/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:43:56,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:43:56,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:43:56,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:43:56,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:43:56,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:43:56,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:43:56,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:43:56,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:43:56,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:43:56,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:43:56,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 20:43:56,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:43:56,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:43:56,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:43:56,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:43:56,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:43:56,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:43:56,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:43:56,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:43:56,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:43:56,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:43:56,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:43:56,913 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-Delay.epf [2021-08-06 20:43:56,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:43:56,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:43:56,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:43:56,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:43:56,931 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:43:56,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:43:56,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:43:56,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:43:56,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:43:56,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:43:56,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:43:56,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:43:56,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:43:56,934 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:43:56,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:43:57,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:43:57,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:43:57,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:43:57,173 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:43:57,174 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:43:57,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-08-06 20:43:57,175 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-08-06 20:43:57,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:43:57,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:43:57,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:43:57,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:43:57,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:43:57,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:43:57,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:43:57,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:43:57,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:43:57,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:43:57,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:43:57,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:43:57,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:43:57,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/1) ... [2021-08-06 20:43:57,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:43:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:57,259 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) [2021-08-06 20:43:57,268 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 [2021-08-06 20:43:57,282 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:43:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:43:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:43:57,282 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:43:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:43:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:43:57,282 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:43:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:43:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:43:57,283 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:43:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:43:57,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:43:57,283 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:43:57,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:43:57,478 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:43:57,479 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:43:57 BoogieIcfgContainer [2021-08-06 20:43:57,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:43:57,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:43:57,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:43:57,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:43:57,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:43:57" (1/2) ... [2021-08-06 20:43:57,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c48f623 and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:43:57, skipping insertion in model container [2021-08-06 20:43:57,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:43:57" (2/2) ... [2021-08-06 20:43:57,484 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-08-06 20:43:57,487 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:43:57,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:43:57,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:43:57,487 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:43:57,539 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:43:57,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:43:57,571 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, mConcurrency=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 [2021-08-06 20:43:57,571 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:43:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:43:57,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:57,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:57,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1204265674, now seen corresponding path program 1 times [2021-08-06 20:43:57,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:57,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423312922] [2021-08-06 20:43:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:57,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:57,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423312922] [2021-08-06 20:43:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423312922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:43:57,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:43:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:43:57,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280903028] [2021-08-06 20:43:57,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:43:57,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:43:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:43:57,867 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:57,890 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-06 20:43:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:43:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 20:43:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:57,897 INFO L225 Difference]: With dead ends: 217 [2021-08-06 20:43:57,897 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:43:57,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:43:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:43:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-06 20:43:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-06 20:43:57,917 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-06 20:43:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:57,918 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-06 20:43:57,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-06 20:43:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:43:57,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:57,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:57,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:43:57,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -808242772, now seen corresponding path program 1 times [2021-08-06 20:43:57,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:57,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311238518] [2021-08-06 20:43:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:57,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:43:57,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:57,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311238518] [2021-08-06 20:43:57,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311238518] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:43:57,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:43:57,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:43:57,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020228504] [2021-08-06 20:43:57,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:43:57,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:43:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:43:57,963 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:58,024 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-06 20:43:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:43:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:43:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:58,026 INFO L225 Difference]: With dead ends: 55 [2021-08-06 20:43:58,026 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 20:43:58,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:43:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 20:43:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-06 20:43:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-06 20:43:58,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-06 20:43:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:58,030 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-06 20:43:58,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-06 20:43:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:43:58,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:58,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:58,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:43:58,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1904417112, now seen corresponding path program 1 times [2021-08-06 20:43:58,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:58,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095041308] [2021-08-06 20:43:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:58,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:43:58,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:58,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095041308] [2021-08-06 20:43:58,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095041308] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:43:58,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:43:58,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:43:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623451347] [2021-08-06 20:43:58,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:43:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:43:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:43:58,095 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:58,129 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-06 20:43:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:43:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:43:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:58,130 INFO L225 Difference]: With dead ends: 66 [2021-08-06 20:43:58,130 INFO L226 Difference]: Without dead ends: 66 [2021-08-06 20:43:58,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:43:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-06 20:43:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-06 20:43:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-06 20:43:58,134 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-06 20:43:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:58,134 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-06 20:43:58,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-06 20:43:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:43:58,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:58,135 INFO L512 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] [2021-08-06 20:43:58,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:43:58,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1105216778, now seen corresponding path program 1 times [2021-08-06 20:43:58,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:58,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392080170] [2021-08-06 20:43:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:58,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:58,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:43:58,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:43:58,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:43:58,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:43:58,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 80.0 percent of original size [2021-08-06 20:43:58,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 80.0 percent of original size [2021-08-06 20:43:58,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:43:58,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:43:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:58,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:58,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392080170] [2021-08-06 20:43:58,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392080170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:58,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617944970] [2021-08-06 20:43:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:58,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:58,402 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) [2021-08-06 20:43:58,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:43:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:58,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:43:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:58,908 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:43:58,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-08-06 20:43:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:58,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617944970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:58,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:58,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:43:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704691316] [2021-08-06 20:43:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:58,992 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:59,252 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-06 20:43:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:43:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:59,254 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:43:59,254 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 20:43:59,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:43:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 20:43:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-06 20:43:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-06 20:43:59,259 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-06 20:43:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:59,259 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-06 20:43:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-06 20:43:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:43:59,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:59,260 INFO L512 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] [2021-08-06 20:43:59,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:59,472 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 [2021-08-06 20:43:59,473 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash -467167990, now seen corresponding path program 2 times [2021-08-06 20:43:59,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:59,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337887088] [2021-08-06 20:43:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:59,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:59,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:43:59,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:43:59,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:43:59,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:43:59,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:43:59,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:43:59,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:43:59,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:43:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:59,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:59,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337887088] [2021-08-06 20:43:59,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337887088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:59,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950118761] [2021-08-06 20:43:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:59,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:59,677 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) [2021-08-06 20:43:59,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:43:59,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:59,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:43:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:59,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:43:59,990 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 11 treesize of output 15 [2021-08-06 20:44:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950118761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:00,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 20:44:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740636305] [2021-08-06 20:44:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:00,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:00,136 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:00,480 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-06 20:44:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:44:00,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:44:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:00,483 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:44:00,483 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 20:44:00,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:44:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 20:44:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-06 20:44:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-06 20:44:00,501 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-06 20:44:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:00,501 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-06 20:44:00,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-06 20:44:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:44:00,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:00,502 INFO L512 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] [2021-08-06 20:44:00,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:00,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:00,712 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash -640858166, now seen corresponding path program 3 times [2021-08-06 20:44:00,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:00,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180659666] [2021-08-06 20:44:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:00,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:00,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:44:00,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 77.6 percent of original size [2021-08-06 20:44:00,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:00,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:00,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:00,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:00,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:00,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180659666] [2021-08-06 20:44:00,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180659666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:00,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47011479] [2021-08-06 20:44:00,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:00,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:00,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:00,867 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) [2021-08-06 20:44:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:44:00,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:44:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:44:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:01,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-08-06 20:44:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:01,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47011479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:01,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:01,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 20:44:01,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463313210] [2021-08-06 20:44:01,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:01,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:01,364 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:01,584 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-06 20:44:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:44:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:44:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:01,586 INFO L225 Difference]: With dead ends: 134 [2021-08-06 20:44:01,586 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:44:01,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:44:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-06 20:44:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-06 20:44:01,596 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-06 20:44:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:01,597 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-06 20:44:01,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-06 20:44:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:01,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:01,598 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:01,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:01,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:01,809 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1444572436, now seen corresponding path program 4 times [2021-08-06 20:44:01,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:01,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919501875] [2021-08-06 20:44:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:01,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:01,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:01,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919501875] [2021-08-06 20:44:01,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919501875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:01,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096039477] [2021-08-06 20:44:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:01,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:01,873 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) [2021-08-06 20:44:01,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:44:02,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:02,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:02,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:02,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:02,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:02,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096039477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:02,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:02,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:44:02,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093094044] [2021-08-06 20:44:02,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:44:02,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:44:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:02,171 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:02,317 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-06 20:44:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:44:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:02,318 INFO L225 Difference]: With dead ends: 192 [2021-08-06 20:44:02,318 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 20:44:02,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:44:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 20:44:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-06 20:44:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-06 20:44:02,321 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-06 20:44:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-06 20:44:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-06 20:44:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:02,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:02,322 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:02,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:02,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:02,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1358899948, now seen corresponding path program 5 times [2021-08-06 20:44:02,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:02,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350608119] [2021-08-06 20:44:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:02,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:02,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350608119] [2021-08-06 20:44:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350608119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528617211] [2021-08-06 20:44:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:02,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:02,609 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) [2021-08-06 20:44:02,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:44:02,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:02,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:02,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528617211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:02,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:02,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839471181] [2021-08-06 20:44:02,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:02,930 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:03,283 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-06 20:44:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:44:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:03,285 INFO L225 Difference]: With dead ends: 254 [2021-08-06 20:44:03,285 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 20:44:03,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:44:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 20:44:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-06 20:44:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:44:03,289 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-06 20:44:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:44:03,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:44:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:03,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:03,290 INFO L512 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] [2021-08-06 20:44:03,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:03,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:03,506 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -751378072, now seen corresponding path program 1 times [2021-08-06 20:44:03,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:03,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671801475] [2021-08-06 20:44:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:03,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:03,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:03,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671801475] [2021-08-06 20:44:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671801475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:03,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237132269] [2021-08-06 20:44:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:03,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:03,550 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) [2021-08-06 20:44:03,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:44:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:03,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:03,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:03,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:44:03,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:44:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237132269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:03,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:44:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871321302] [2021-08-06 20:44:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:03,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:03,857 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:03,914 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-06 20:44:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:44:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:03,915 INFO L225 Difference]: With dead ends: 206 [2021-08-06 20:44:03,915 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:44:03,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:44:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:44:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-06 20:44:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-06 20:44:03,919 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-06 20:44:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:03,919 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-06 20:44:03,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-06 20:44:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:03,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:03,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:03,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:04,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:04,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1693841640, now seen corresponding path program 6 times [2021-08-06 20:44:04,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:04,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937673217] [2021-08-06 20:44:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:04,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:04,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:04,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937673217] [2021-08-06 20:44:04,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937673217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:04,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464239851] [2021-08-06 20:44:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:04,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:04,186 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) [2021-08-06 20:44:04,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:44:04,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:04,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464239851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:04,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:04,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:04,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328350013] [2021-08-06 20:44:04,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:04,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:04,533 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:04,634 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-06 20:44:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:44:04,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:04,635 INFO L225 Difference]: With dead ends: 230 [2021-08-06 20:44:04,635 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 20:44:04,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 20:44:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-06 20:44:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-06 20:44:04,639 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-06 20:44:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:04,639 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-06 20:44:04,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-06 20:44:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:04,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:04,640 INFO L512 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] [2021-08-06 20:44:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:04,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:04,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1547404952, now seen corresponding path program 2 times [2021-08-06 20:44:04,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:04,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991440918] [2021-08-06 20:44:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:04,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:04,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:04,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991440918] [2021-08-06 20:44:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991440918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:04,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701707305] [2021-08-06 20:44:04,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:04,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:04,886 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) [2021-08-06 20:44:04,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:44:05,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:05,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:05,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:05,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701707305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:05,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:05,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:44:05,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586727938] [2021-08-06 20:44:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:05,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:05,201 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:05,279 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-06 20:44:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:44:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:05,280 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:44:05,280 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:44:05,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:44:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-06 20:44:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-06 20:44:05,284 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-06 20:44:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:05,284 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-06 20:44:05,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-06 20:44:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:05,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:05,285 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:05,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:05,511 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,SelfDestructingSolverStorable10 [2021-08-06 20:44:05,512 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2092221976, now seen corresponding path program 7 times [2021-08-06 20:44:05,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:05,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906076688] [2021-08-06 20:44:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:05,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:05,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:05,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906076688] [2021-08-06 20:44:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906076688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:05,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944417182] [2021-08-06 20:44:05,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:05,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:05,556 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) [2021-08-06 20:44:05,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:44:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:05,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:05,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944417182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:05,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:05,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291831848] [2021-08-06 20:44:05,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:05,911 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:06,447 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-06 20:44:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:44:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:06,450 INFO L225 Difference]: With dead ends: 577 [2021-08-06 20:44:06,450 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 20:44:06,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:44:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 20:44:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-06 20:44:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-06 20:44:06,456 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-06 20:44:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:06,456 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-06 20:44:06,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-06 20:44:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:06,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:06,457 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:06,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:06,673 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1834399512, now seen corresponding path program 8 times [2021-08-06 20:44:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:06,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128854110] [2021-08-06 20:44:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:06,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:06,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:06,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128854110] [2021-08-06 20:44:06,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128854110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:06,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389217216] [2021-08-06 20:44:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:06,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:06,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:06,714 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) [2021-08-06 20:44:06,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:44:06,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:06,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:06,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389217216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:07,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:07,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:07,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639969697] [2021-08-06 20:44:07,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:07,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:07,133 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:07,337 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-06 20:44:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:07,339 INFO L225 Difference]: With dead ends: 355 [2021-08-06 20:44:07,339 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 20:44:07,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 20:44:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-06 20:44:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-06 20:44:07,344 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-06 20:44:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:07,344 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-06 20:44:07,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-06 20:44:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:07,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:07,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:07,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:07,552 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,SelfDestructingSolverStorable12 [2021-08-06 20:44:07,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash 888183016, now seen corresponding path program 9 times [2021-08-06 20:44:07,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:07,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200148752] [2021-08-06 20:44:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:07,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:07,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:07,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200148752] [2021-08-06 20:44:07,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200148752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:07,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690460757] [2021-08-06 20:44:07,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:07,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:07,618 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) [2021-08-06 20:44:07,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:44:07,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:07,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:08,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690460757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:08,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:08,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:08,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859973578] [2021-08-06 20:44:08,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:08,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:08,005 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:08,281 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-06 20:44:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:44:08,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:08,282 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:44:08,282 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:44:08,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:44:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:44:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-06 20:44:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-06 20:44:08,287 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-06 20:44:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:08,288 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-06 20:44:08,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-06 20:44:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:08,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:08,288 INFO L512 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] [2021-08-06 20:44:08,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:08,509 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,SelfDestructingSolverStorable13 [2021-08-06 20:44:08,509 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1801158104, now seen corresponding path program 3 times [2021-08-06 20:44:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:08,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547850186] [2021-08-06 20:44:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:08,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:08,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:08,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547850186] [2021-08-06 20:44:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547850186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:08,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659920755] [2021-08-06 20:44:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:08,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:08,557 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) [2021-08-06 20:44:08,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:44:08,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:44:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:08,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:08,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:08,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659920755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:08,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:08,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:44:08,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543685930] [2021-08-06 20:44:08,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:08,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:08,878 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:08,946 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-06 20:44:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:44:08,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:08,947 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:44:08,947 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 20:44:08,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 20:44:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-06 20:44:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-06 20:44:08,952 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-06 20:44:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:08,952 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-06 20:44:08,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-06 20:44:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:08,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:08,952 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:08,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:09,169 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,SelfDestructingSolverStorable14 [2021-08-06 20:44:09,169 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1504756568, now seen corresponding path program 10 times [2021-08-06 20:44:09,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:09,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702627863] [2021-08-06 20:44:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:09,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:09,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:09,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702627863] [2021-08-06 20:44:09,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702627863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:09,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420147712] [2021-08-06 20:44:09,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:09,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:09,219 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) [2021-08-06 20:44:09,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:44:09,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:09,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:09,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:09,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420147712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:09,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:09,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:09,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241257809] [2021-08-06 20:44:09,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:09,614 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:09,920 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-06 20:44:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:44:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:09,922 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:44:09,922 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:44:09,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:44:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:44:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-06 20:44:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-06 20:44:09,929 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-06 20:44:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:09,929 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-06 20:44:09,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-06 20:44:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:09,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:09,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:09,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:10,139 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,SelfDestructingSolverStorable15 [2021-08-06 20:44:10,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1327513290, now seen corresponding path program 4 times [2021-08-06 20:44:10,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:10,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587908997] [2021-08-06 20:44:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:10,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:10,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 51.5 percent of original size [2021-08-06 20:44:10,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 51.5 percent of original size [2021-08-06 20:44:10,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 93.6 percent of original size [2021-08-06 20:44:10,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 93.6 percent of original size [2021-08-06 20:44:10,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 92.7 percent of original size [2021-08-06 20:44:10,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 92.7 percent of original size [2021-08-06 20:44:10,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 55.6 percent of original size [2021-08-06 20:44:10,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 55.6 percent of original size [2021-08-06 20:44:10,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:10,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:10,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:10,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587908997] [2021-08-06 20:44:10,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587908997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:10,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10702759] [2021-08-06 20:44:10,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:10,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:10,377 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) [2021-08-06 20:44:10,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:44:10,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:11,074 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:11,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:44:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:11,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10702759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:11,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:11,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:11,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495278461] [2021-08-06 20:44:11,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:11,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:11,142 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:11,483 INFO L93 Difference]: Finished difference Result 420 states and 858 transitions. [2021-08-06 20:44:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:44:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:11,484 INFO L225 Difference]: With dead ends: 420 [2021-08-06 20:44:11,485 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 20:44:11,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 20:44:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 292. [2021-08-06 20:44:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-06 20:44:11,491 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-06 20:44:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:11,491 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-06 20:44:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-06 20:44:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:11,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:11,492 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:11,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:11,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:11,705 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1581302414, now seen corresponding path program 5 times [2021-08-06 20:44:11,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:11,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186272072] [2021-08-06 20:44:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:11,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:11,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 52.7 percent of original size [2021-08-06 20:44:11,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 52.7 percent of original size [2021-08-06 20:44:11,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:44:11,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:44:11,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:11,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:11,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:11,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:11,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:11,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186272072] [2021-08-06 20:44:11,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186272072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:11,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158133956] [2021-08-06 20:44:11,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:11,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:11,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:11,965 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) [2021-08-06 20:44:11,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:44:12,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:12,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:12,668 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:44:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:12,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158133956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:12,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:12,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:44:12,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513642283] [2021-08-06 20:44:12,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:12,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:12,753 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:13,284 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-06 20:44:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:13,285 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:44:13,285 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 20:44:13,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:44:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 20:44:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-06 20:44:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-06 20:44:13,291 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-06 20:44:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:13,291 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-06 20:44:13,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-06 20:44:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:13,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:13,292 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:13,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:13,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:44:13,509 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -522234294, now seen corresponding path program 11 times [2021-08-06 20:44:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:13,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330992817] [2021-08-06 20:44:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:13,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:13,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:13,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:13,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 67.9 percent of original size [2021-08-06 20:44:13,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 67.9 percent of original size [2021-08-06 20:44:13,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 68.2 percent of original size [2021-08-06 20:44:13,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 68.2 percent of original size [2021-08-06 20:44:13,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 75.2 percent of original size [2021-08-06 20:44:13,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 75.2 percent of original size [2021-08-06 20:44:13,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 73.9 percent of original size [2021-08-06 20:44:13,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 73.9 percent of original size [2021-08-06 20:44:13,830 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:13,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:13,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:13,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:13,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:13,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330992817] [2021-08-06 20:44:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330992817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:13,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446725017] [2021-08-06 20:44:13,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:13,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:13,861 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) [2021-08-06 20:44:13,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:44:14,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:14,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:14,531 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:44:14,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:44:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446725017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:14,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:44:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351569465] [2021-08-06 20:44:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:14,597 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:15,614 INFO L93 Difference]: Finished difference Result 358 states and 728 transitions. [2021-08-06 20:44:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:44:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-08-06 20:44:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:15,616 INFO L225 Difference]: With dead ends: 358 [2021-08-06 20:44:15,616 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 20:44:15,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 969.9ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:44:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 20:44:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2021-08-06 20:44:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:44:15,622 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:44:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:15,622 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:44:15,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:44:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:15,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:15,622 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:15,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:15,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:15,836 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:15,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1437337910, now seen corresponding path program 6 times [2021-08-06 20:44:15,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:15,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34878752] [2021-08-06 20:44:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:15,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:15,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:44:15,914 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:44:16,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:16,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:16,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:16,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:16,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:16,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34878752] [2021-08-06 20:44:16,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34878752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:16,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884367661] [2021-08-06 20:44:16,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:16,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:16,083 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) [2021-08-06 20:44:16,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:44:16,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:16,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:16,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:16,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:16,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:44:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884367661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:16,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:16,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:44:16,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491286880] [2021-08-06 20:44:16,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:16,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:16,872 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:17,894 INFO L93 Difference]: Finished difference Result 508 states and 997 transitions. [2021-08-06 20:44:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:44:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:17,895 INFO L225 Difference]: With dead ends: 508 [2021-08-06 20:44:17,896 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 20:44:17,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:44:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 20:44:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 310. [2021-08-06 20:44:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.168284789644013) internal successors, (670), 309 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 670 transitions. [2021-08-06 20:44:17,901 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 670 transitions. Word has length 26 [2021-08-06 20:44:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:17,902 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 670 transitions. [2021-08-06 20:44:17,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 670 transitions. [2021-08-06 20:44:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:17,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:17,902 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:17,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:18,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:18,119 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash 531486410, now seen corresponding path program 7 times [2021-08-06 20:44:18,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:18,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879993063] [2021-08-06 20:44:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:18,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:18,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:18,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:18,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:18,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:18,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:18,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:18,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:18,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879993063] [2021-08-06 20:44:18,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879993063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:18,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367457005] [2021-08-06 20:44:18,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:18,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:18,325 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) [2021-08-06 20:44:18,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:44:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:19,127 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:44:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:19,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367457005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:19,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:19,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:19,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680067592] [2021-08-06 20:44:19,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:19,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:19,180 INFO L87 Difference]: Start difference. First operand 310 states and 670 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:19,839 INFO L93 Difference]: Finished difference Result 532 states and 1070 transitions. [2021-08-06 20:44:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:44:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:19,841 INFO L225 Difference]: With dead ends: 532 [2021-08-06 20:44:19,841 INFO L226 Difference]: Without dead ends: 527 [2021-08-06 20:44:19,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:44:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-06 20:44:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 314. [2021-08-06 20:44:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1725239616613417) internal successors, (680), 313 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 680 transitions. [2021-08-06 20:44:19,847 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 680 transitions. Word has length 26 [2021-08-06 20:44:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:19,847 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 680 transitions. [2021-08-06 20:44:19,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 680 transitions. [2021-08-06 20:44:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:19,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:19,848 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:19,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:20,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:20,061 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1040898358, now seen corresponding path program 8 times [2021-08-06 20:44:20,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:20,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172755410] [2021-08-06 20:44:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:20,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:20,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:20,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:20,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:20,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:20,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:20,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:20,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:20,262 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:20,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:20,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172755410] [2021-08-06 20:44:20,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172755410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:20,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415780475] [2021-08-06 20:44:20,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:20,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:20,276 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) [2021-08-06 20:44:20,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:44:20,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:20,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:20,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:20,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:44:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:21,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415780475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:21,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:21,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:44:21,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301250954] [2021-08-06 20:44:21,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:21,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:21,119 INFO L87 Difference]: Start difference. First operand 314 states and 680 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:22,253 INFO L93 Difference]: Finished difference Result 591 states and 1182 transitions. [2021-08-06 20:44:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:44:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:22,255 INFO L225 Difference]: With dead ends: 591 [2021-08-06 20:44:22,255 INFO L226 Difference]: Without dead ends: 586 [2021-08-06 20:44:22,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:44:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-06 20:44:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 315. [2021-08-06 20:44:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.1687898089171975) internal successors, (681), 314 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 681 transitions. [2021-08-06 20:44:22,262 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 681 transitions. Word has length 26 [2021-08-06 20:44:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:22,262 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 681 transitions. [2021-08-06 20:44:22,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 681 transitions. [2021-08-06 20:44:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:22,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:22,263 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:22,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:22,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:22,477 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1139814798, now seen corresponding path program 9 times [2021-08-06 20:44:22,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:22,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108475696] [2021-08-06 20:44:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:22,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:22,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:22,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:22,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:22,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 75.7 percent of original size [2021-08-06 20:44:22,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:44:22,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:44:22,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:22,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:22,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:22,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:22,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:22,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108475696] [2021-08-06 20:44:22,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108475696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:22,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081085131] [2021-08-06 20:44:22,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:22,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:22,693 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) [2021-08-06 20:44:22,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:44:23,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:23,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:23,588 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:44:23,588 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 35 treesize of output 43 [2021-08-06 20:44:23,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:44:23,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:44:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081085131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:23,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:23,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:23,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973441178] [2021-08-06 20:44:23,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:23,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:23,959 INFO L87 Difference]: Start difference. First operand 315 states and 681 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:24,867 INFO L93 Difference]: Finished difference Result 612 states and 1215 transitions. [2021-08-06 20:44:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:44:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:24,869 INFO L225 Difference]: With dead ends: 612 [2021-08-06 20:44:24,869 INFO L226 Difference]: Without dead ends: 607 [2021-08-06 20:44:24,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:44:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-06 20:44:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 316. [2021-08-06 20:44:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-06 20:44:24,876 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-06 20:44:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:24,876 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-06 20:44:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-06 20:44:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:24,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:24,876 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:24,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:25,092 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,SelfDestructingSolverStorable22 [2021-08-06 20:44:25,093 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash 244491850, now seen corresponding path program 12 times [2021-08-06 20:44:25,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:25,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476755908] [2021-08-06 20:44:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:25,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:25,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:25,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:25,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 71.6 percent of original size [2021-08-06 20:44:25,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 71.6 percent of original size [2021-08-06 20:44:25,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:44:25,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:44:25,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 77.3 percent of original size [2021-08-06 20:44:25,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 77.3 percent of original size [2021-08-06 20:44:25,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.7 percent of original size [2021-08-06 20:44:25,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.7 percent of original size [2021-08-06 20:44:25,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:25,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:25,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:25,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:25,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:25,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476755908] [2021-08-06 20:44:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476755908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:25,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883380288] [2021-08-06 20:44:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:25,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:25,440 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) [2021-08-06 20:44:25,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:44:25,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:44:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:26,266 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:44:26,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2021-08-06 20:44:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:26,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883380288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:26,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:26,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:44:26,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172396236] [2021-08-06 20:44:26,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:44:26,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:44:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:44:26,457 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:27,939 INFO L93 Difference]: Finished difference Result 412 states and 822 transitions. [2021-08-06 20:44:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:44:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:27,942 INFO L225 Difference]: With dead ends: 412 [2021-08-06 20:44:27,942 INFO L226 Difference]: Without dead ends: 407 [2021-08-06 20:44:27,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1428.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:44:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-06 20:44:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 314. [2021-08-06 20:44:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.159744408945687) internal successors, (676), 313 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 676 transitions. [2021-08-06 20:44:27,954 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 676 transitions. Word has length 26 [2021-08-06 20:44:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:27,955 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 676 transitions. [2021-08-06 20:44:27,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 676 transitions. [2021-08-06 20:44:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:27,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:27,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:27,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:28,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 20:44:28,169 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:28,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1327892918, now seen corresponding path program 13 times [2021-08-06 20:44:28,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:28,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573967892] [2021-08-06 20:44:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:28,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:28,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:28,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:28,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:28,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:28,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:28,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:28,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.2 percent of original size [2021-08-06 20:44:28,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.2 percent of original size [2021-08-06 20:44:28,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:28,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:28,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:28,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:28,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:28,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:28,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:28,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573967892] [2021-08-06 20:44:28,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573967892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:28,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268345401] [2021-08-06 20:44:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:28,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:28,413 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:28,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:44:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:29,237 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:44:29,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:44:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:29,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268345401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:29,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:29,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:44:29,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933240001] [2021-08-06 20:44:29,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:29,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:29,393 INFO L87 Difference]: Start difference. First operand 314 states and 676 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:31,130 INFO L93 Difference]: Finished difference Result 640 states and 1274 transitions. [2021-08-06 20:44:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:44:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:31,132 INFO L225 Difference]: With dead ends: 640 [2021-08-06 20:44:31,132 INFO L226 Difference]: Without dead ends: 625 [2021-08-06 20:44:31,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1529.2ms TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:44:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-06 20:44:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 323. [2021-08-06 20:44:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1739130434782608) internal successors, (700), 322 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 700 transitions. [2021-08-06 20:44:31,139 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 700 transitions. Word has length 26 [2021-08-06 20:44:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:31,139 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 700 transitions. [2021-08-06 20:44:31,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 700 transitions. [2021-08-06 20:44:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:31,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:31,139 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:31,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:31,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:31,353 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash 277733258, now seen corresponding path program 10 times [2021-08-06 20:44:31,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:31,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052174125] [2021-08-06 20:44:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:31,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:31,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:31,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:31,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:31,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:31,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:31,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:31,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:31,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:31,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:31,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052174125] [2021-08-06 20:44:31,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052174125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:31,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446810276] [2021-08-06 20:44:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:31,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:31,615 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:31,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:44:32,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:32,546 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:44:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446810276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:32,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:32,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:32,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374674446] [2021-08-06 20:44:32,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:32,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:32,602 INFO L87 Difference]: Start difference. First operand 323 states and 700 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:32,956 INFO L93 Difference]: Finished difference Result 445 states and 924 transitions. [2021-08-06 20:44:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:32,958 INFO L225 Difference]: With dead ends: 445 [2021-08-06 20:44:32,958 INFO L226 Difference]: Without dead ends: 440 [2021-08-06 20:44:32,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:44:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-06 20:44:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 331. [2021-08-06 20:44:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.16969696969697) internal successors, (716), 330 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 716 transitions. [2021-08-06 20:44:32,963 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 716 transitions. Word has length 26 [2021-08-06 20:44:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:32,963 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 716 transitions. [2021-08-06 20:44:32,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 716 transitions. [2021-08-06 20:44:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:32,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:32,964 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:32,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:33,173 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1294651510, now seen corresponding path program 11 times [2021-08-06 20:44:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:33,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074258091] [2021-08-06 20:44:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:33,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:33,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:33,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:33,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:33,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:33,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:33,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:33,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:33,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:33,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:33,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:33,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:33,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074258091] [2021-08-06 20:44:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074258091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:33,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277410513] [2021-08-06 20:44:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:33,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:33,394 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:33,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:44:33,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:33,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:34,273 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:44:34,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2021-08-06 20:44:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:34,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277410513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:34,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:34,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:44:34,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650445254] [2021-08-06 20:44:34,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:34,416 INFO L87 Difference]: Start difference. First operand 331 states and 716 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:35,218 INFO L93 Difference]: Finished difference Result 501 states and 1024 transitions. [2021-08-06 20:44:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:44:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:35,220 INFO L225 Difference]: With dead ends: 501 [2021-08-06 20:44:35,220 INFO L226 Difference]: Without dead ends: 496 [2021-08-06 20:44:35,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:44:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-06 20:44:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 333. [2021-08-06 20:44:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1716867469879517) internal successors, (721), 332 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 721 transitions. [2021-08-06 20:44:35,225 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 721 transitions. Word has length 26 [2021-08-06 20:44:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:35,225 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 721 transitions. [2021-08-06 20:44:35,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 721 transitions. [2021-08-06 20:44:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:35,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:35,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:35,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:35,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 20:44:35,442 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash -791382962, now seen corresponding path program 12 times [2021-08-06 20:44:35,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:35,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62997980] [2021-08-06 20:44:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:35,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:35,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:35,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:35,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:35,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:35,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:35,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:44:35,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:35,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:35,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:35,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:35,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:35,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62997980] [2021-08-06 20:44:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62997980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:35,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883820609] [2021-08-06 20:44:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:35,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:35,684 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:35,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:44:36,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:36,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:36,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:44:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883820609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:36,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:44:36,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609633612] [2021-08-06 20:44:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:36,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:36,796 INFO L87 Difference]: Start difference. First operand 333 states and 721 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:37,328 INFO L93 Difference]: Finished difference Result 460 states and 959 transitions. [2021-08-06 20:44:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:37,330 INFO L225 Difference]: With dead ends: 460 [2021-08-06 20:44:37,330 INFO L226 Difference]: Without dead ends: 455 [2021-08-06 20:44:37,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:44:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-08-06 20:44:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2021-08-06 20:44:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.182089552238806) internal successors, (731), 335 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 731 transitions. [2021-08-06 20:44:37,334 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 731 transitions. Word has length 26 [2021-08-06 20:44:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:37,335 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 731 transitions. [2021-08-06 20:44:37,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 731 transitions. [2021-08-06 20:44:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:37,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:37,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:37,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:37,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:44:37,549 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1908751862, now seen corresponding path program 13 times [2021-08-06 20:44:37,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:37,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479794440] [2021-08-06 20:44:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:37,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:37,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:37,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:37,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:37,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.1 percent of original size [2021-08-06 20:44:37,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:37,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:37,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:37,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:37,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:37,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:37,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479794440] [2021-08-06 20:44:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479794440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791518150] [2021-08-06 20:44:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:37,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:37,744 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:37,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:44:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:38,766 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:44:38,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 20:44:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791518150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:38,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:38,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147146241] [2021-08-06 20:44:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:38,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:38,884 INFO L87 Difference]: Start difference. First operand 336 states and 731 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:39,315 INFO L93 Difference]: Finished difference Result 514 states and 1058 transitions. [2021-08-06 20:44:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:44:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:39,317 INFO L225 Difference]: With dead ends: 514 [2021-08-06 20:44:39,317 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 20:44:39,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:44:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 20:44:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 338. [2021-08-06 20:44:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1810089020771515) internal successors, (735), 337 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 735 transitions. [2021-08-06 20:44:39,322 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 735 transitions. Word has length 26 [2021-08-06 20:44:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:39,322 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 735 transitions. [2021-08-06 20:44:39,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 735 transitions. [2021-08-06 20:44:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:39,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:39,323 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:39,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:39,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:44:39,524 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1275612790, now seen corresponding path program 14 times [2021-08-06 20:44:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42776158] [2021-08-06 20:44:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:39,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:39,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:44:39,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:44:39,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:39,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:44:39,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:39,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:39,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:39,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42776158] [2021-08-06 20:44:39,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42776158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:39,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700459029] [2021-08-06 20:44:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:39,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:39,767 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:39,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:44:40,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:40,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:40,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-08-06 20:44:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:41,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700459029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:41,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:41,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-06 20:44:41,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491846408] [2021-08-06 20:44:41,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:41,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:41,123 INFO L87 Difference]: Start difference. First operand 338 states and 735 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:42,003 INFO L93 Difference]: Finished difference Result 500 states and 1014 transitions. [2021-08-06 20:44:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:44:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:42,005 INFO L225 Difference]: With dead ends: 500 [2021-08-06 20:44:42,005 INFO L226 Difference]: Without dead ends: 490 [2021-08-06 20:44:42,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:44:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-06 20:44:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 341. [2021-08-06 20:44:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.1911764705882355) internal successors, (745), 340 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 745 transitions. [2021-08-06 20:44:42,010 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 745 transitions. Word has length 26 [2021-08-06 20:44:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 745 transitions. [2021-08-06 20:44:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 745 transitions. [2021-08-06 20:44:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:42,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:42,011 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:42,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:42,225 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash 831957258, now seen corresponding path program 14 times [2021-08-06 20:44:42,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:42,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562090620] [2021-08-06 20:44:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:42,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:42,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:42,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:44:42,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 71.6 percent of original size [2021-08-06 20:44:42,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 71.6 percent of original size [2021-08-06 20:44:42,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:44:42,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:44:42,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 69.6 percent of original size [2021-08-06 20:44:42,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 69.6 percent of original size [2021-08-06 20:44:42,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.7 percent of original size [2021-08-06 20:44:42,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.7 percent of original size [2021-08-06 20:44:42,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:42,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:42,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:42,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:42,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562090620] [2021-08-06 20:44:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562090620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617627245] [2021-08-06 20:44:42,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:42,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:42,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:42,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:44:43,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:43,721 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:44:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2021-08-06 20:44:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:43,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617627245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:43,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:44:43,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389397207] [2021-08-06 20:44:43,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:44:43,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:44:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:44:43,885 INFO L87 Difference]: Start difference. First operand 341 states and 745 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:44,953 INFO L93 Difference]: Finished difference Result 431 states and 874 transitions. [2021-08-06 20:44:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:44:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:44,954 INFO L225 Difference]: With dead ends: 431 [2021-08-06 20:44:44,955 INFO L226 Difference]: Without dead ends: 421 [2021-08-06 20:44:44,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:44:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-06 20:44:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2021-08-06 20:44:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.1911764705882355) internal successors, (745), 340 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 745 transitions. [2021-08-06 20:44:44,959 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 745 transitions. Word has length 26 [2021-08-06 20:44:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:44,960 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 745 transitions. [2021-08-06 20:44:44,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 745 transitions. [2021-08-06 20:44:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:44,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:44,961 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:44,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:45,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:45,174 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -659537654, now seen corresponding path program 15 times [2021-08-06 20:44:45,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:45,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838902457] [2021-08-06 20:44:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:45,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:45,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:45,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:45,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:45,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:45,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:45,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:45,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:45,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:45,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:45,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:45,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:45,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:45,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:45,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838902457] [2021-08-06 20:44:45,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838902457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:45,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359315140] [2021-08-06 20:44:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:45,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:45,419 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:45,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:44:46,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:44:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:46,657 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-06 20:44:46,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2021-08-06 20:44:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:47,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359315140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:47,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:47,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 20:44:47,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284369892] [2021-08-06 20:44:47,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:44:47,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:44:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:44:47,220 INFO L87 Difference]: Start difference. First operand 341 states and 745 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:48,282 INFO L93 Difference]: Finished difference Result 537 states and 1086 transitions. [2021-08-06 20:44:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:44:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 26 [2021-08-06 20:44:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:48,284 INFO L225 Difference]: With dead ends: 537 [2021-08-06 20:44:48,284 INFO L226 Difference]: Without dead ends: 527 [2021-08-06 20:44:48,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1068.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:44:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-06 20:44:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 348. [2021-08-06 20:44:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.1930835734870318) internal successors, (761), 347 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 761 transitions. [2021-08-06 20:44:48,289 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 761 transitions. Word has length 26 [2021-08-06 20:44:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 761 transitions. [2021-08-06 20:44:48,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 761 transitions. [2021-08-06 20:44:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:48,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:48,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:48,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:48,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:48,501 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash -83146358, now seen corresponding path program 15 times [2021-08-06 20:44:48,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:48,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231369806] [2021-08-06 20:44:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:48,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:48,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:48,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:48,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:44:48,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:44:48,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:48,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:48,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:48,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:48,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:48,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231369806] [2021-08-06 20:44:48,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231369806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:48,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546329550] [2021-08-06 20:44:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:48,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:48,684 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:48,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:44:49,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:49,861 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:44:49,861 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 35 treesize of output 43 [2021-08-06 20:44:50,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:44:50,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:44:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546329550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:50,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:50,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:50,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262807671] [2021-08-06 20:44:50,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:50,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:50,175 INFO L87 Difference]: Start difference. First operand 348 states and 761 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:51,048 INFO L93 Difference]: Finished difference Result 588 states and 1197 transitions. [2021-08-06 20:44:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:44:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:51,050 INFO L225 Difference]: With dead ends: 588 [2021-08-06 20:44:51,050 INFO L226 Difference]: Without dead ends: 583 [2021-08-06 20:44:51,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:44:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-06 20:44:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 350. [2021-08-06 20:44:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.1977077363896846) internal successors, (767), 349 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 767 transitions. [2021-08-06 20:44:51,056 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 767 transitions. Word has length 26 [2021-08-06 20:44:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:51,056 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 767 transitions. [2021-08-06 20:44:51,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 767 transitions. [2021-08-06 20:44:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:51,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:51,056 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:51,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 20:44:51,262 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -740427510, now seen corresponding path program 16 times [2021-08-06 20:44:51,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:51,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578907790] [2021-08-06 20:44:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:51,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:51,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:51,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:51,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:51,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:51,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:51,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:51,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:51,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:51,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:51,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:51,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:51,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:51,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:51,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:51,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:51,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578907790] [2021-08-06 20:44:51,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578907790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:51,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755666284] [2021-08-06 20:44:51,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:51,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:51,505 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:51,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:44:52,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:52,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:44:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:52,690 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:44:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:44:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755666284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:52,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:52,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:44:52,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717506798] [2021-08-06 20:44:52,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:52,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:52,845 INFO L87 Difference]: Start difference. First operand 350 states and 767 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:54,233 INFO L93 Difference]: Finished difference Result 649 states and 1328 transitions. [2021-08-06 20:44:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:44:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:54,235 INFO L225 Difference]: With dead ends: 649 [2021-08-06 20:44:54,235 INFO L226 Difference]: Without dead ends: 633 [2021-08-06 20:44:54,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:44:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-08-06 20:44:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 380. [2021-08-06 20:44:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2242744063324538) internal successors, (843), 379 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 843 transitions. [2021-08-06 20:44:54,242 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 843 transitions. Word has length 26 [2021-08-06 20:44:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:54,242 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 843 transitions. [2021-08-06 20:44:54,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 843 transitions. [2021-08-06 20:44:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:54,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:54,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:54,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:54,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:54,456 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2097566798, now seen corresponding path program 16 times [2021-08-06 20:44:54,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:54,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048003114] [2021-08-06 20:44:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:54,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:54,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:54,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.5 percent of original size [2021-08-06 20:44:54,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:54,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:54,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:54,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:44:54,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:54,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:44:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:54,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:54,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048003114] [2021-08-06 20:44:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048003114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:54,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139027222] [2021-08-06 20:44:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:54,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:54,647 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:44:55,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:55,861 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:44:55,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 20:44:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:55,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139027222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:55,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:55,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:55,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993413026] [2021-08-06 20:44:55,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:55,993 INFO L87 Difference]: Start difference. First operand 380 states and 843 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:56,513 INFO L93 Difference]: Finished difference Result 580 states and 1204 transitions. [2021-08-06 20:44:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:44:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:56,516 INFO L225 Difference]: With dead ends: 580 [2021-08-06 20:44:56,516 INFO L226 Difference]: Without dead ends: 575 [2021-08-06 20:44:56,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:44:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-06 20:44:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 376. [2021-08-06 20:44:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2213333333333334) internal successors, (833), 375 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 833 transitions. [2021-08-06 20:44:56,521 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 833 transitions. Word has length 26 [2021-08-06 20:44:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:56,521 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 833 transitions. [2021-08-06 20:44:56,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 833 transitions. [2021-08-06 20:44:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:56,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:56,522 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:56,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 20:44:56,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:56,728 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1098279730, now seen corresponding path program 17 times [2021-08-06 20:44:56,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:56,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313469771] [2021-08-06 20:44:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:56,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:56,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:56,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:44:56,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:56,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:44:56,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:56,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.4 percent of original size [2021-08-06 20:44:56,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:56,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 67.2 percent of original size [2021-08-06 20:44:56,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 76.4 percent of original size [2021-08-06 20:44:56,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 76.4 percent of original size [2021-08-06 20:44:56,920 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:56,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:44:56,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:56,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:44:56,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:56,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:44:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:56,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:56,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313469771] [2021-08-06 20:44:56,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313469771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:56,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637366248] [2021-08-06 20:44:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:56,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:56,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:56,974 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:56,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:44:57,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:44:57,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:58,175 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:44:58,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:44:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:58,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637366248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:58,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:58,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:44:58,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740799481] [2021-08-06 20:44:58,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:58,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:58,319 INFO L87 Difference]: Start difference. First operand 376 states and 833 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:59,852 INFO L93 Difference]: Finished difference Result 525 states and 1127 transitions. [2021-08-06 20:44:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:44:59,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:59,854 INFO L225 Difference]: With dead ends: 525 [2021-08-06 20:44:59,854 INFO L226 Difference]: Without dead ends: 515 [2021-08-06 20:44:59,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1446.3ms TimeCoverageRelationStatistics Valid=492, Invalid=2058, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:44:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-06 20:44:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 384. [2021-08-06 20:44:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.227154046997389) internal successors, (853), 383 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 853 transitions. [2021-08-06 20:44:59,860 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 853 transitions. Word has length 26 [2021-08-06 20:44:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:59,860 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 853 transitions. [2021-08-06 20:44:59,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 853 transitions. [2021-08-06 20:44:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:59,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:59,861 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:59,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 20:45:00,075 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1552875658, now seen corresponding path program 17 times [2021-08-06 20:45:00,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:00,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247256352] [2021-08-06 20:45:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:00,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:00,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:00,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:00,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:00,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:00,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:00,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247256352] [2021-08-06 20:45:00,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247256352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:00,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961866512] [2021-08-06 20:45:00,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:00,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:00,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:00,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:45:01,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:01,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:45:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:01,578 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:45:01,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:45:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:01,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961866512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:01,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:01,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:45:01,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341269632] [2021-08-06 20:45:01,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:01,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:01,638 INFO L87 Difference]: Start difference. First operand 384 states and 853 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:02,181 INFO L93 Difference]: Finished difference Result 538 states and 1143 transitions. [2021-08-06 20:45:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:45:02,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 26 [2021-08-06 20:45:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:02,183 INFO L225 Difference]: With dead ends: 538 [2021-08-06 20:45:02,183 INFO L226 Difference]: Without dead ends: 533 [2021-08-06 20:45:02,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:45:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-06 20:45:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 398. [2021-08-06 20:45:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-06 20:45:02,189 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-06 20:45:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:02,190 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-06 20:45:02,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-06 20:45:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:02,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:02,190 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:02,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:02,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 20:45:02,410 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash -19509110, now seen corresponding path program 18 times [2021-08-06 20:45:02,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:02,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719883495] [2021-08-06 20:45:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:02,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:02,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:02,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:02,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:02,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:02,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:02,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:02,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:02,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719883495] [2021-08-06 20:45:02,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719883495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:02,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137931086] [2021-08-06 20:45:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:02,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:02,651 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:02,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:45:03,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:04,144 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-08-06 20:45:04,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-08-06 20:45:04,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 20:45:04,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 20:45:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:04,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137931086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:04,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:04,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581162225] [2021-08-06 20:45:04,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:04,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:04,278 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:04,679 INFO L93 Difference]: Finished difference Result 617 states and 1292 transitions. [2021-08-06 20:45:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:04,681 INFO L225 Difference]: With dead ends: 617 [2021-08-06 20:45:04,681 INFO L226 Difference]: Without dead ends: 612 [2021-08-06 20:45:04,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:45:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-06 20:45:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 398. [2021-08-06 20:45:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-06 20:45:04,688 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-06 20:45:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-06 20:45:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-06 20:45:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:04,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:04,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:04,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:04,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 20:45:04,890 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash -193199286, now seen corresponding path program 19 times [2021-08-06 20:45:04,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:04,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540060002] [2021-08-06 20:45:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:04,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:04,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:04,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:45:05,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:05,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:05,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:05,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:05,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:05,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540060002] [2021-08-06 20:45:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540060002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783633177] [2021-08-06 20:45:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:05,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:05,063 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:05,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:45:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:45:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:06,534 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:45:06,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 20:45:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:06,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783633177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:06,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:06,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:06,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340049035] [2021-08-06 20:45:06,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:06,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:06,650 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:07,035 INFO L93 Difference]: Finished difference Result 552 states and 1179 transitions. [2021-08-06 20:45:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:07,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:07,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:07,037 INFO L225 Difference]: With dead ends: 552 [2021-08-06 20:45:07,037 INFO L226 Difference]: Without dead ends: 547 [2021-08-06 20:45:07,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:45:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-06 20:45:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 398. [2021-08-06 20:45:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-06 20:45:07,056 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-06 20:45:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-06 20:45:07,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-06 20:45:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:07,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:07,057 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:07,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:07,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 20:45:07,269 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash -785003702, now seen corresponding path program 20 times [2021-08-06 20:45:07,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:07,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237916036] [2021-08-06 20:45:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:07,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:07,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:07,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:07,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:07,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:07,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:07,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237916036] [2021-08-06 20:45:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237916036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:07,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431544690] [2021-08-06 20:45:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:07,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:07,533 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:07,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:45:08,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:45:08,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:08,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:45:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:09,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431544690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:09,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:09,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:45:09,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524038521] [2021-08-06 20:45:09,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:09,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:09,047 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:09,473 INFO L93 Difference]: Finished difference Result 558 states and 1187 transitions. [2021-08-06 20:45:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:09,475 INFO L225 Difference]: With dead ends: 558 [2021-08-06 20:45:09,475 INFO L226 Difference]: Without dead ends: 553 [2021-08-06 20:45:09,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:45:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-06 20:45:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 402. [2021-08-06 20:45:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-08-06 20:45:09,481 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 26 [2021-08-06 20:45:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:09,481 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-08-06 20:45:09,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-08-06 20:45:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:09,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:09,482 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:09,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 20:45:09,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 20:45:09,683 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -834692602, now seen corresponding path program 21 times [2021-08-06 20:45:09,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:09,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297604279] [2021-08-06 20:45:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:09,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:09,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:09,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:09,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:09,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:09,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:09,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:09,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:09,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297604279] [2021-08-06 20:45:09,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297604279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:09,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421614884] [2021-08-06 20:45:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:09,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:09,861 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:09,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:45:10,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:45:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:11,362 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:11,362 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 35 treesize of output 43 [2021-08-06 20:45:11,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:45:11,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 66.7 percent of original size [2021-08-06 20:45:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421614884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:11,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:11,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:11,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337914700] [2021-08-06 20:45:11,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:11,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:11,677 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:12,043 INFO L93 Difference]: Finished difference Result 546 states and 1168 transitions. [2021-08-06 20:45:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:12,045 INFO L225 Difference]: With dead ends: 546 [2021-08-06 20:45:12,045 INFO L226 Difference]: Without dead ends: 541 [2021-08-06 20:45:12,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:45:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-06 20:45:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 406. [2021-08-06 20:45:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.2271604938271605) internal successors, (902), 405 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 902 transitions. [2021-08-06 20:45:12,051 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 902 transitions. Word has length 26 [2021-08-06 20:45:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:12,051 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 902 transitions. [2021-08-06 20:45:12,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 902 transitions. [2021-08-06 20:45:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:12,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:12,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:12,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:12,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 20:45:12,273 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -337213050, now seen corresponding path program 22 times [2021-08-06 20:45:12,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:12,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692807050] [2021-08-06 20:45:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:12,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:12,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 71.3 percent of original size [2021-08-06 20:45:12,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 71.3 percent of original size [2021-08-06 20:45:12,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:45:12,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 20:45:12,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:12,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:12,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:12,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692807050] [2021-08-06 20:45:12,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692807050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:12,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112410846] [2021-08-06 20:45:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:12,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:12,489 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:12,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:45:13,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:13,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:45:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:14,081 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:45:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-08-06 20:45:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:14,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112410846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:14,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:14,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:45:14,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696308619] [2021-08-06 20:45:14,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:14,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:14,151 INFO L87 Difference]: Start difference. First operand 406 states and 902 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:14,512 INFO L93 Difference]: Finished difference Result 548 states and 1159 transitions. [2021-08-06 20:45:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:14,514 INFO L225 Difference]: With dead ends: 548 [2021-08-06 20:45:14,514 INFO L226 Difference]: Without dead ends: 543 [2021-08-06 20:45:14,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:45:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-06 20:45:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 408. [2021-08-06 20:45:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.230958230958231) internal successors, (908), 407 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 908 transitions. [2021-08-06 20:45:14,519 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 908 transitions. Word has length 26 [2021-08-06 20:45:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:14,519 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 908 transitions. [2021-08-06 20:45:14,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 908 transitions. [2021-08-06 20:45:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:14,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:14,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:14,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:14,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 20:45:14,720 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1770356998, now seen corresponding path program 18 times [2021-08-06 20:45:14,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:14,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263661613] [2021-08-06 20:45:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:14,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:14,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:14,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:14,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:14,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:14,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:14,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:14,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:14,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263661613] [2021-08-06 20:45:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263661613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:14,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229154342] [2021-08-06 20:45:14,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:14,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:14,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:14,857 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:14,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:45:16,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:16,369 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:45:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2021-08-06 20:45:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:16,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229154342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:16,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:16,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 20:45:16,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595067142] [2021-08-06 20:45:16,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:16,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:16,479 INFO L87 Difference]: Start difference. First operand 408 states and 908 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:17,166 INFO L93 Difference]: Finished difference Result 535 states and 1102 transitions. [2021-08-06 20:45:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:45:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:17,172 INFO L225 Difference]: With dead ends: 535 [2021-08-06 20:45:17,172 INFO L226 Difference]: Without dead ends: 525 [2021-08-06 20:45:17,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:45:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-06 20:45:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 417. [2021-08-06 20:45:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.235576923076923) internal successors, (930), 416 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 930 transitions. [2021-08-06 20:45:17,178 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 930 transitions. Word has length 26 [2021-08-06 20:45:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:17,178 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 930 transitions. [2021-08-06 20:45:17,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 930 transitions. [2021-08-06 20:45:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:17,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:17,179 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:17,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 20:45:17,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 20:45:17,393 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:17,393 INFO L82 PathProgramCache]: Analyzing trace with hash 855253382, now seen corresponding path program 23 times [2021-08-06 20:45:17,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:17,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52874967] [2021-08-06 20:45:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:17,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:17,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 86.4 percent of original size [2021-08-06 20:45:17,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 86.4 percent of original size [2021-08-06 20:45:17,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:45:17,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 20:45:17,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:17,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:17,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:17,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:17,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:17,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52874967] [2021-08-06 20:45:17,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52874967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:17,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82060954] [2021-08-06 20:45:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:17,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:17,563 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:17,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:45:18,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:18,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:19,114 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:45:19,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 20:45:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:19,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82060954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:19,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:19,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:19,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494988567] [2021-08-06 20:45:19,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:19,250 INFO L87 Difference]: Start difference. First operand 417 states and 930 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:20,077 INFO L93 Difference]: Finished difference Result 658 states and 1373 transitions. [2021-08-06 20:45:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:45:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:20,080 INFO L225 Difference]: With dead ends: 658 [2021-08-06 20:45:20,080 INFO L226 Difference]: Without dead ends: 653 [2021-08-06 20:45:20,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:45:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-08-06 20:45:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 417. [2021-08-06 20:45:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.235576923076923) internal successors, (930), 416 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 930 transitions. [2021-08-06 20:45:20,086 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 930 transitions. Word has length 26 [2021-08-06 20:45:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:20,086 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 930 transitions. [2021-08-06 20:45:20,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 930 transitions. [2021-08-06 20:45:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:20,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:20,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:20,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:20,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:20,287 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 197972230, now seen corresponding path program 19 times [2021-08-06 20:45:20,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:20,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377810023] [2021-08-06 20:45:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:20,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:20,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:20,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:20,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:20,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:20,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:20,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:20,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:20,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:20,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:20,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377810023] [2021-08-06 20:45:20,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377810023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:20,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147392590] [2021-08-06 20:45:20,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:20,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:20,437 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:20,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:45:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:45:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:21,988 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:45:21,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:45:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:22,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147392590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:22,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:22,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:45:22,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682081413] [2021-08-06 20:45:22,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:45:22,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:45:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:45:22,168 INFO L87 Difference]: Start difference. First operand 417 states and 930 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:22,931 INFO L93 Difference]: Finished difference Result 725 states and 1475 transitions. [2021-08-06 20:45:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:45:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:22,933 INFO L225 Difference]: With dead ends: 725 [2021-08-06 20:45:22,933 INFO L226 Difference]: Without dead ends: 711 [2021-08-06 20:45:22,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:45:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-08-06 20:45:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 426. [2021-08-06 20:45:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.2376470588235295) internal successors, (951), 425 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 951 transitions. [2021-08-06 20:45:22,939 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 951 transitions. Word has length 26 [2021-08-06 20:45:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:22,940 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 951 transitions. [2021-08-06 20:45:22,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 951 transitions. [2021-08-06 20:45:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:22,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:22,940 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:22,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:45:23,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:23,141 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1259000758, now seen corresponding path program 24 times [2021-08-06 20:45:23,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:23,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271490055] [2021-08-06 20:45:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:23,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:23,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 86.4 percent of original size [2021-08-06 20:45:23,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 86.4 percent of original size [2021-08-06 20:45:23,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:45:23,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:45:23,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:23,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:23,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:23,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:23,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:23,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271490055] [2021-08-06 20:45:23,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271490055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:23,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194736621] [2021-08-06 20:45:23,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:23,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:23,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:23,325 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:23,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:45:24,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:24,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:24,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:24,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:24,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-06 20:45:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:24,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194736621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:24,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:24,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:45:24,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656626579] [2021-08-06 20:45:24,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:24,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:24,983 INFO L87 Difference]: Start difference. First operand 426 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:25,736 INFO L93 Difference]: Finished difference Result 600 states and 1276 transitions. [2021-08-06 20:45:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:45:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:25,738 INFO L225 Difference]: With dead ends: 600 [2021-08-06 20:45:25,738 INFO L226 Difference]: Without dead ends: 595 [2021-08-06 20:45:25,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:45:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-06 20:45:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 423. [2021-08-06 20:45:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2298578199052135) internal successors, (941), 422 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 941 transitions. [2021-08-06 20:45:25,743 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 941 transitions. Word has length 26 [2021-08-06 20:45:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:25,743 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 941 transitions. [2021-08-06 20:45:25,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 941 transitions. [2021-08-06 20:45:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:25,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:25,744 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:25,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 20:45:25,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 20:45:25,945 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash -159879990, now seen corresponding path program 20 times [2021-08-06 20:45:25,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:25,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213602816] [2021-08-06 20:45:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:25,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:25,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:25,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:26,009 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:26,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.0 percent of original size [2021-08-06 20:45:26,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 70.0 percent of original size [2021-08-06 20:45:26,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 70.0 percent of original size [2021-08-06 20:45:26,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:26,085 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:26,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:26,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:26,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:26,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213602816] [2021-08-06 20:45:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213602816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:26,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411125716] [2021-08-06 20:45:26,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:26,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:26,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:26,121 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:26,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:45:27,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:45:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:27,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:27,752 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 20:45:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:27,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411125716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:27,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:27,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:45:27,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090277701] [2021-08-06 20:45:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:27,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:27,922 INFO L87 Difference]: Start difference. First operand 423 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:29,098 INFO L93 Difference]: Finished difference Result 649 states and 1358 transitions. [2021-08-06 20:45:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:45:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:29,100 INFO L225 Difference]: With dead ends: 649 [2021-08-06 20:45:29,100 INFO L226 Difference]: Without dead ends: 639 [2021-08-06 20:45:29,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1030.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:45:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-08-06 20:45:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 427. [2021-08-06 20:45:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.232394366197183) internal successors, (951), 426 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 951 transitions. [2021-08-06 20:45:29,106 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 951 transitions. Word has length 26 [2021-08-06 20:45:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:29,106 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 951 transitions. [2021-08-06 20:45:29,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 951 transitions. [2021-08-06 20:45:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:29,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:29,107 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:29,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 20:45:29,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 20:45:29,308 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 946842442, now seen corresponding path program 25 times [2021-08-06 20:45:29,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:29,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701355518] [2021-08-06 20:45:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:29,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:29,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:29,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:29,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:29,391 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 65.1 percent of original size [2021-08-06 20:45:29,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:29,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:29,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:29,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:29,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:29,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701355518] [2021-08-06 20:45:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701355518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:29,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347710804] [2021-08-06 20:45:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:29,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:29,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:29,487 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:29,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:45:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:45:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:31,206 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:45:31,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 20:45:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:31,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347710804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:31,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:31,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:31,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344198174] [2021-08-06 20:45:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:31,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:31,330 INFO L87 Difference]: Start difference. First operand 427 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:31,768 INFO L93 Difference]: Finished difference Result 586 states and 1251 transitions. [2021-08-06 20:45:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:31,770 INFO L225 Difference]: With dead ends: 586 [2021-08-06 20:45:31,770 INFO L226 Difference]: Without dead ends: 581 [2021-08-06 20:45:31,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:45:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-08-06 20:45:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 431. [2021-08-06 20:45:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.23953488372093) internal successors, (963), 430 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 963 transitions. [2021-08-06 20:45:31,776 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 963 transitions. Word has length 26 [2021-08-06 20:45:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:31,776 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 963 transitions. [2021-08-06 20:45:31,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 963 transitions. [2021-08-06 20:45:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:31,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:31,776 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:31,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 20:45:31,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 20:45:31,981 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 639945674, now seen corresponding path program 21 times [2021-08-06 20:45:31,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:31,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868606592] [2021-08-06 20:45:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:31,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:32,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:32,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 53.8 percent of original size [2021-08-06 20:45:32,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:32,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:45:32,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:32,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:45:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:32,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:32,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868606592] [2021-08-06 20:45:32,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868606592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:32,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117513260] [2021-08-06 20:45:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:32,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:32,157 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:45:33,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:33,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:45:33,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:33,767 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:45:33,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:45:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117513260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:34,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:45:34,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129966585] [2021-08-06 20:45:34,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:45:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:45:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:45:34,008 INFO L87 Difference]: Start difference. First operand 431 states and 963 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:34,542 INFO L93 Difference]: Finished difference Result 600 states and 1271 transitions. [2021-08-06 20:45:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:45:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:34,544 INFO L225 Difference]: With dead ends: 600 [2021-08-06 20:45:34,544 INFO L226 Difference]: Without dead ends: 590 [2021-08-06 20:45:34,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:45:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-06 20:45:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 426. [2021-08-06 20:45:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.232941176470588) internal successors, (949), 425 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 949 transitions. [2021-08-06 20:45:34,550 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 949 transitions. Word has length 26 [2021-08-06 20:45:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:34,550 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 949 transitions. [2021-08-06 20:45:34,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 949 transitions. [2021-08-06 20:45:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:34,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:34,550 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:34,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 20:45:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:34,769 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1982319532, now seen corresponding path program 26 times [2021-08-06 20:45:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:34,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629457422] [2021-08-06 20:45:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:34,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:34,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:34,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629457422] [2021-08-06 20:45:34,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629457422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:34,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313932467] [2021-08-06 20:45:34,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:34,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:34,835 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:45:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:45:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:36,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:36,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:36,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313932467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:36,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:36,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:45:36,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311489494] [2021-08-06 20:45:36,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:45:36,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:45:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:45:36,548 INFO L87 Difference]: Start difference. First operand 426 states and 949 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:37,236 INFO L93 Difference]: Finished difference Result 965 states and 1937 transitions. [2021-08-06 20:45:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:45:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-08-06 20:45:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:37,238 INFO L225 Difference]: With dead ends: 965 [2021-08-06 20:45:37,238 INFO L226 Difference]: Without dead ends: 965 [2021-08-06 20:45:37,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:45:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-08-06 20:45:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 486. [2021-08-06 20:45:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.270103092783505) internal successors, (1101), 485 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1101 transitions. [2021-08-06 20:45:37,246 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1101 transitions. Word has length 28 [2021-08-06 20:45:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:37,246 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1101 transitions. [2021-08-06 20:45:37,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1101 transitions. [2021-08-06 20:45:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:37,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:37,247 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:37,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 20:45:37,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 20:45:37,447 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash 490824620, now seen corresponding path program 27 times [2021-08-06 20:45:37,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:37,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833021792] [2021-08-06 20:45:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:37,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:37,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:37,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833021792] [2021-08-06 20:45:37,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833021792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:37,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314226547] [2021-08-06 20:45:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:37,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:37,527 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:37,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:45:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:45:38,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:45:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:39,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:39,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:39,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314226547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:39,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:39,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:45:39,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073930721] [2021-08-06 20:45:39,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:39,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:39,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:39,202 INFO L87 Difference]: Start difference. First operand 486 states and 1101 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:40,056 INFO L93 Difference]: Finished difference Result 1115 states and 2178 transitions. [2021-08-06 20:45:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:45:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:40,058 INFO L225 Difference]: With dead ends: 1115 [2021-08-06 20:45:40,058 INFO L226 Difference]: Without dead ends: 1115 [2021-08-06 20:45:40,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:45:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-08-06 20:45:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 488. [2021-08-06 20:45:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.2566735112936347) internal successors, (1099), 487 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1099 transitions. [2021-08-06 20:45:40,067 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1099 transitions. Word has length 28 [2021-08-06 20:45:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:40,067 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1099 transitions. [2021-08-06 20:45:40,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1099 transitions. [2021-08-06 20:45:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:40,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:40,068 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:40,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 20:45:40,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:40,272 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:40,272 INFO L82 PathProgramCache]: Analyzing trace with hash 132571948, now seen corresponding path program 22 times [2021-08-06 20:45:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:40,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58718425] [2021-08-06 20:45:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:40,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:40,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58718425] [2021-08-06 20:45:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58718425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:40,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920098843] [2021-08-06 20:45:40,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:40,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:40,333 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:40,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:45:41,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:45:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:41,956 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:41,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:41,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920098843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:41,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:41,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:45:41,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35638315] [2021-08-06 20:45:41,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:45:41,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:45:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:45:41,977 INFO L87 Difference]: Start difference. First operand 488 states and 1099 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:42,343 INFO L93 Difference]: Finished difference Result 846 states and 1722 transitions. [2021-08-06 20:45:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:45:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:42,345 INFO L225 Difference]: With dead ends: 846 [2021-08-06 20:45:42,345 INFO L226 Difference]: Without dead ends: 846 [2021-08-06 20:45:42,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:45:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-06 20:45:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 486. [2021-08-06 20:45:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.2536082474226804) internal successors, (1093), 485 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1093 transitions. [2021-08-06 20:45:42,352 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1093 transitions. Word has length 28 [2021-08-06 20:45:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:42,352 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1093 transitions. [2021-08-06 20:45:42,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1093 transitions. [2021-08-06 20:45:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:42,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:42,353 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:42,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 20:45:42,573 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1872794840, now seen corresponding path program 28 times [2021-08-06 20:45:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:42,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834100844] [2021-08-06 20:45:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:42,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:45:42,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:42,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834100844] [2021-08-06 20:45:42,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834100844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:42,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204803943] [2021-08-06 20:45:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:42,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:42,625 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:42,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:45:44,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:44,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:45:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:44,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:44,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:45:44,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204803943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:44,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:44,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:45:44,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976310422] [2021-08-06 20:45:44,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:45:44,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:45:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:45:44,323 INFO L87 Difference]: Start difference. First operand 486 states and 1093 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:44,414 INFO L93 Difference]: Finished difference Result 799 states and 1693 transitions. [2021-08-06 20:45:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:45:44,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:44,416 INFO L225 Difference]: With dead ends: 799 [2021-08-06 20:45:44,416 INFO L226 Difference]: Without dead ends: 799 [2021-08-06 20:45:44,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:45:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-08-06 20:45:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 678. [2021-08-06 20:45:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.2511078286558344) internal successors, (1524), 677 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1524 transitions. [2021-08-06 20:45:44,424 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1524 transitions. Word has length 28 [2021-08-06 20:45:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:44,424 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1524 transitions. [2021-08-06 20:45:44,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1524 transitions. [2021-08-06 20:45:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:44,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:44,425 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:44,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:44,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 20:45:44,626 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 572424872, now seen corresponding path program 29 times [2021-08-06 20:45:44,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:44,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262701035] [2021-08-06 20:45:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:44,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:44,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:44,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262701035] [2021-08-06 20:45:44,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262701035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:44,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360263995] [2021-08-06 20:45:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:44,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:44,684 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:44,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:45:46,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:46,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:45:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:46,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:46,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360263995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:46,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:45:46,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654256797] [2021-08-06 20:45:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:45:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:45:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:45:46,431 INFO L87 Difference]: Start difference. First operand 678 states and 1524 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:46,759 INFO L93 Difference]: Finished difference Result 989 states and 2011 transitions. [2021-08-06 20:45:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:45:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:46,761 INFO L225 Difference]: With dead ends: 989 [2021-08-06 20:45:46,761 INFO L226 Difference]: Without dead ends: 971 [2021-08-06 20:45:46,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:45:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-08-06 20:45:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 747. [2021-08-06 20:45:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.253351206434316) internal successors, (1681), 746 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1681 transitions. [2021-08-06 20:45:46,771 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1681 transitions. Word has length 28 [2021-08-06 20:45:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:46,771 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1681 transitions. [2021-08-06 20:45:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1681 transitions. [2021-08-06 20:45:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:46,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:46,773 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:46,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 20:45:46,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:46,973 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1081457192, now seen corresponding path program 23 times [2021-08-06 20:45:46,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501133736] [2021-08-06 20:45:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:46,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:47,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:47,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501133736] [2021-08-06 20:45:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501133736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:47,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364752477] [2021-08-06 20:45:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:47,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:47,041 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:45:48,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:45:48,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:45:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:48,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364752477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:48,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:48,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:45:48,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383639239] [2021-08-06 20:45:48,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:48,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:48,726 INFO L87 Difference]: Start difference. First operand 747 states and 1681 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:49,022 INFO L93 Difference]: Finished difference Result 1481 states and 2980 transitions. [2021-08-06 20:45:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:45:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:49,025 INFO L225 Difference]: With dead ends: 1481 [2021-08-06 20:45:49,025 INFO L226 Difference]: Without dead ends: 1465 [2021-08-06 20:45:49,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:45:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-08-06 20:45:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 975. [2021-08-06 20:45:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.2751540041067764) internal successors, (2216), 974 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2216 transitions. [2021-08-06 20:45:49,041 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2216 transitions. Word has length 28 [2021-08-06 20:45:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2216 transitions. [2021-08-06 20:45:49,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2216 transitions. [2021-08-06 20:45:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:49,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:49,042 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:49,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 20:45:49,243 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2135177896, now seen corresponding path program 30 times [2021-08-06 20:45:49,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:49,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158981458] [2021-08-06 20:45:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:49,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:49,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158981458] [2021-08-06 20:45:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158981458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536155477] [2021-08-06 20:45:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:49,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:49,305 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:45:50,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:45:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:45:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:50,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:50,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536155477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:50,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:45:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689991010] [2021-08-06 20:45:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:45:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:45:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:45:50,969 INFO L87 Difference]: Start difference. First operand 975 states and 2216 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:51,387 INFO L93 Difference]: Finished difference Result 1387 states and 2786 transitions. [2021-08-06 20:45:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:45:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:51,389 INFO L225 Difference]: With dead ends: 1387 [2021-08-06 20:45:51,389 INFO L226 Difference]: Without dead ends: 1375 [2021-08-06 20:45:51,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:45:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-08-06 20:45:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 987. [2021-08-06 20:45:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.281947261663286) internal successors, (2250), 986 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2250 transitions. [2021-08-06 20:45:51,403 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2250 transitions. Word has length 28 [2021-08-06 20:45:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2250 transitions. [2021-08-06 20:45:51,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2250 transitions. [2021-08-06 20:45:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:51,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:51,405 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:51,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 20:45:51,611 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash -629673304, now seen corresponding path program 31 times [2021-08-06 20:45:51,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:51,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501539912] [2021-08-06 20:45:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:51,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:51,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:51,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501539912] [2021-08-06 20:45:51,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501539912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:51,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320028450] [2021-08-06 20:45:51,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:51,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:51,672 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:51,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:45:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:45:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:53,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:53,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320028450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:53,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:45:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049685902] [2021-08-06 20:45:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:45:53,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:45:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:45:53,373 INFO L87 Difference]: Start difference. First operand 987 states and 2250 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:53,855 INFO L93 Difference]: Finished difference Result 1351 states and 2746 transitions. [2021-08-06 20:45:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:45:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:53,857 INFO L225 Difference]: With dead ends: 1351 [2021-08-06 20:45:53,857 INFO L226 Difference]: Without dead ends: 1337 [2021-08-06 20:45:53,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:45:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-06 20:45:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 975. [2021-08-06 20:45:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.293634496919918) internal successors, (2234), 974 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2234 transitions. [2021-08-06 20:45:53,881 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2234 transitions. Word has length 28 [2021-08-06 20:45:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:53,881 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2234 transitions. [2021-08-06 20:45:53,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2234 transitions. [2021-08-06 20:45:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:53,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:53,883 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:53,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:54,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:54,101 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 94771880, now seen corresponding path program 32 times [2021-08-06 20:45:54,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:54,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584143118] [2021-08-06 20:45:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:54,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:54,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:54,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584143118] [2021-08-06 20:45:54,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584143118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:54,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183407817] [2021-08-06 20:45:54,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:54,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:54,165 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:45:55,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:55,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:45:55,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:55,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:55,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:45:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:55,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183407817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:55,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:55,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:45:55,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192805758] [2021-08-06 20:45:55,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:45:55,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:45:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:45:55,813 INFO L87 Difference]: Start difference. First operand 975 states and 2234 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:56,087 INFO L93 Difference]: Finished difference Result 1452 states and 2941 transitions. [2021-08-06 20:45:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:45:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:56,089 INFO L225 Difference]: With dead ends: 1452 [2021-08-06 20:45:56,090 INFO L226 Difference]: Without dead ends: 1440 [2021-08-06 20:45:56,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:45:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-08-06 20:45:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 983. [2021-08-06 20:45:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 2.3024439918533606) internal successors, (2261), 982 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2261 transitions. [2021-08-06 20:45:56,104 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2261 transitions. Word has length 28 [2021-08-06 20:45:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:56,104 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 2261 transitions. [2021-08-06 20:45:56,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2261 transitions. [2021-08-06 20:45:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:56,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:56,106 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:56,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:56,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:56,306 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1148492584, now seen corresponding path program 33 times [2021-08-06 20:45:56,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:56,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404998235] [2021-08-06 20:45:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:56,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:45:56,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:56,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404998235] [2021-08-06 20:45:56,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404998235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:56,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437389278] [2021-08-06 20:45:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:56,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:56,349 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:56,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:45:57,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:45:57,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:57,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:57,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:45:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437389278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:57,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:57,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:45:57,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232550772] [2021-08-06 20:45:57,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:45:57,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:45:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:45:57,973 INFO L87 Difference]: Start difference. First operand 983 states and 2261 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:58,054 INFO L93 Difference]: Finished difference Result 1122 states and 2447 transitions. [2021-08-06 20:45:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:45:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:45:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:58,055 INFO L225 Difference]: With dead ends: 1122 [2021-08-06 20:45:58,055 INFO L226 Difference]: Without dead ends: 1122 [2021-08-06 20:45:58,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:45:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-08-06 20:45:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 910. [2021-08-06 20:45:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.3014301430143016) internal successors, (2092), 909 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2092 transitions. [2021-08-06 20:45:58,065 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2092 transitions. Word has length 28 [2021-08-06 20:45:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:58,065 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2092 transitions. [2021-08-06 20:45:58,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2092 transitions. [2021-08-06 20:45:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:45:58,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:58,067 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:58,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:58,267 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 603675560, now seen corresponding path program 34 times [2021-08-06 20:45:58,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:58,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337999738] [2021-08-06 20:45:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:58,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:58,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:58,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337999738] [2021-08-06 20:45:58,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337999738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:58,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092291317] [2021-08-06 20:45:58,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:58,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:58,317 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:58,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:45:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:45:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:59,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:45:59,990 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:00,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092291317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:00,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:00,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:46:00,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243704258] [2021-08-06 20:46:00,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:00,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:00,010 INFO L87 Difference]: Start difference. First operand 910 states and 2092 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:00,708 INFO L93 Difference]: Finished difference Result 2867 states and 5769 transitions. [2021-08-06 20:46:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:46:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:00,712 INFO L225 Difference]: With dead ends: 2867 [2021-08-06 20:46:00,712 INFO L226 Difference]: Without dead ends: 2867 [2021-08-06 20:46:00,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:46:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-08-06 20:46:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 851. [2021-08-06 20:46:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.2741176470588234) internal successors, (1933), 850 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1933 transitions. [2021-08-06 20:46:00,729 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1933 transitions. Word has length 28 [2021-08-06 20:46:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:00,730 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1933 transitions. [2021-08-06 20:46:00,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1933 transitions. [2021-08-06 20:46:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:00,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:00,731 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:00,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:00,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 20:46:00,945 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 861498024, now seen corresponding path program 35 times [2021-08-06 20:46:00,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:00,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384978679] [2021-08-06 20:46:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:00,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384978679] [2021-08-06 20:46:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384978679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167574523] [2021-08-06 20:46:00,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:00,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:00,995 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:46:02,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:02,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:02,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:02,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:02,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167574523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:02,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512379618] [2021-08-06 20:46:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:02,636 INFO L87 Difference]: Start difference. First operand 851 states and 1933 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:02,955 INFO L93 Difference]: Finished difference Result 1368 states and 2775 transitions. [2021-08-06 20:46:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:46:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:02,958 INFO L225 Difference]: With dead ends: 1368 [2021-08-06 20:46:02,958 INFO L226 Difference]: Without dead ends: 1364 [2021-08-06 20:46:02,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:46:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-08-06 20:46:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 919. [2021-08-06 20:46:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3061002178649237) internal successors, (2117), 918 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2117 transitions. [2021-08-06 20:46:02,971 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2117 transitions. Word has length 28 [2021-08-06 20:46:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:02,971 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2117 transitions. [2021-08-06 20:46:02,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2117 transitions. [2021-08-06 20:46:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:02,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:02,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:02,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:03,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 20:46:03,181 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash -710886744, now seen corresponding path program 36 times [2021-08-06 20:46:03,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:03,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235050948] [2021-08-06 20:46:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:03,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:03,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235050948] [2021-08-06 20:46:03,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235050948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881667464] [2021-08-06 20:46:03,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:03,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:03,234 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:46:04,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:04,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:04,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:04,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881667464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:04,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:04,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221089841] [2021-08-06 20:46:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:04,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:04,907 INFO L87 Difference]: Start difference. First operand 919 states and 2117 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:05,288 INFO L93 Difference]: Finished difference Result 1392 states and 2830 transitions. [2021-08-06 20:46:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:46:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:05,290 INFO L225 Difference]: With dead ends: 1392 [2021-08-06 20:46:05,290 INFO L226 Difference]: Without dead ends: 1392 [2021-08-06 20:46:05,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:46:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-08-06 20:46:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 854. [2021-08-06 20:46:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.287221570926143) internal successors, (1951), 853 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1951 transitions. [2021-08-06 20:46:05,304 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1951 transitions. Word has length 28 [2021-08-06 20:46:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:05,304 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1951 transitions. [2021-08-06 20:46:05,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1951 transitions. [2021-08-06 20:46:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:05,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:05,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:05,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 20:46:05,506 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2125030056, now seen corresponding path program 37 times [2021-08-06 20:46:05,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:05,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073687989] [2021-08-06 20:46:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:05,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:05,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073687989] [2021-08-06 20:46:05,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073687989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098134718] [2021-08-06 20:46:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:05,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:05,567 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:46:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:07,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:07,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098134718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:07,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:07,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:07,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480643862] [2021-08-06 20:46:07,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:07,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:07,271 INFO L87 Difference]: Start difference. First operand 854 states and 1951 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:07,693 INFO L93 Difference]: Finished difference Result 1412 states and 2930 transitions. [2021-08-06 20:46:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:46:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:07,695 INFO L225 Difference]: With dead ends: 1412 [2021-08-06 20:46:07,695 INFO L226 Difference]: Without dead ends: 1410 [2021-08-06 20:46:07,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:46:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-08-06 20:46:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 990. [2021-08-06 20:46:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 2.2932254802831142) internal successors, (2268), 989 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2268 transitions. [2021-08-06 20:46:07,707 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2268 transitions. Word has length 28 [2021-08-06 20:46:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:07,707 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 2268 transitions. [2021-08-06 20:46:07,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2268 transitions. [2021-08-06 20:46:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:07,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:07,709 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:07,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:07,929 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -62367192, now seen corresponding path program 24 times [2021-08-06 20:46:07,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:07,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818662619] [2021-08-06 20:46:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:07,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:07,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:07,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818662619] [2021-08-06 20:46:07,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818662619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:07,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679271571] [2021-08-06 20:46:07,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:07,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:07,989 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:08,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:46:09,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:09,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:09,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679271571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:09,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:46:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868167941] [2021-08-06 20:46:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:09,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:09,710 INFO L87 Difference]: Start difference. First operand 990 states and 2268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:10,011 INFO L93 Difference]: Finished difference Result 1911 states and 4062 transitions. [2021-08-06 20:46:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:46:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:10,014 INFO L225 Difference]: With dead ends: 1911 [2021-08-06 20:46:10,014 INFO L226 Difference]: Without dead ends: 1899 [2021-08-06 20:46:10,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:46:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-08-06 20:46:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1437. [2021-08-06 20:46:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.3356545961002784) internal successors, (3354), 1436 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3354 transitions. [2021-08-06 20:46:10,032 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3354 transitions. Word has length 28 [2021-08-06 20:46:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:10,032 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 3354 transitions. [2021-08-06 20:46:10,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3354 transitions. [2021-08-06 20:46:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:10,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:10,036 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:10,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:10,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:10,259 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash -977470808, now seen corresponding path program 38 times [2021-08-06 20:46:10,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:10,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963281845] [2021-08-06 20:46:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:10,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:10,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:10,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963281845] [2021-08-06 20:46:10,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963281845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:10,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695552007] [2021-08-06 20:46:10,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:10,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:10,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:10,341 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:10,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:46:11,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:11,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:12,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:12,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695552007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:12,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:12,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:12,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501286820] [2021-08-06 20:46:12,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:12,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:12,069 INFO L87 Difference]: Start difference. First operand 1437 states and 3354 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:12,654 INFO L93 Difference]: Finished difference Result 2023 states and 4324 transitions. [2021-08-06 20:46:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:46:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:12,657 INFO L225 Difference]: With dead ends: 2023 [2021-08-06 20:46:12,657 INFO L226 Difference]: Without dead ends: 2023 [2021-08-06 20:46:12,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:46:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-08-06 20:46:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1447. [2021-08-06 20:46:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 2.3291839557399725) internal successors, (3368), 1446 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 3368 transitions. [2021-08-06 20:46:12,676 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 3368 transitions. Word has length 28 [2021-08-06 20:46:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:12,676 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 3368 transitions. [2021-08-06 20:46:12,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 3368 transitions. [2021-08-06 20:46:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:12,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:12,678 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:12,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 20:46:12,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 20:46:12,879 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1051128680, now seen corresponding path program 39 times [2021-08-06 20:46:12,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:12,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431246680] [2021-08-06 20:46:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:12,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:12,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:12,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431246680] [2021-08-06 20:46:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431246680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:12,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934578901] [2021-08-06 20:46:12,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:12,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:12,930 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:12,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:46:14,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:14,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:14,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:14,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934578901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:14,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:14,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:46:14,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029172412] [2021-08-06 20:46:14,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:46:14,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:46:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:46:14,641 INFO L87 Difference]: Start difference. First operand 1447 states and 3368 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:14,825 INFO L93 Difference]: Finished difference Result 2285 states and 5071 transitions. [2021-08-06 20:46:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:46:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:14,828 INFO L225 Difference]: With dead ends: 2285 [2021-08-06 20:46:14,828 INFO L226 Difference]: Without dead ends: 2273 [2021-08-06 20:46:14,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:46:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-06 20:46:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1835. [2021-08-06 20:46:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 2.3380588876772084) internal successors, (4288), 1834 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 4288 transitions. [2021-08-06 20:46:14,851 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 4288 transitions. Word has length 28 [2021-08-06 20:46:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:14,851 INFO L470 AbstractCegarLoop]: Abstraction has 1835 states and 4288 transitions. [2021-08-06 20:46:14,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 4288 transitions. [2021-08-06 20:46:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:14,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:14,854 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:14,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:15,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 20:46:15,069 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1851096232, now seen corresponding path program 40 times [2021-08-06 20:46:15,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:15,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765689675] [2021-08-06 20:46:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:15,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:15,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:15,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765689675] [2021-08-06 20:46:15,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765689675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:15,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141424996] [2021-08-06 20:46:15,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:15,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:15,111 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:15,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:46:16,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:16,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:46:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:16,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:16,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:16,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141424996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:16,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:16,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:46:16,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534250318] [2021-08-06 20:46:16,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:46:16,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:46:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:46:16,828 INFO L87 Difference]: Start difference. First operand 1835 states and 4288 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:16,921 INFO L93 Difference]: Finished difference Result 1973 states and 4550 transitions. [2021-08-06 20:46:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:46:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:16,931 INFO L225 Difference]: With dead ends: 1973 [2021-08-06 20:46:16,931 INFO L226 Difference]: Without dead ends: 1973 [2021-08-06 20:46:16,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-08-06 20:46:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1938. [2021-08-06 20:46:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.3226639132679403) internal successors, (4499), 1937 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 4499 transitions. [2021-08-06 20:46:16,953 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 4499 transitions. Word has length 28 [2021-08-06 20:46:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:16,953 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 4499 transitions. [2021-08-06 20:46:16,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 4499 transitions. [2021-08-06 20:46:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:16,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:16,956 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:16,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 20:46:17,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:17,156 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:17,156 INFO L82 PathProgramCache]: Analyzing trace with hash 127625004, now seen corresponding path program 41 times [2021-08-06 20:46:17,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:17,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738732293] [2021-08-06 20:46:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:17,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:17,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:17,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738732293] [2021-08-06 20:46:17,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738732293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:17,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638513478] [2021-08-06 20:46:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:17,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:17,229 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:17,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:46:18,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:18,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:18,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638513478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:18,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:46:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020111089] [2021-08-06 20:46:18,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:46:18,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:46:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:46:18,984 INFO L87 Difference]: Start difference. First operand 1938 states and 4499 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:19,167 INFO L93 Difference]: Finished difference Result 2373 states and 5348 transitions. [2021-08-06 20:46:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:46:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:19,170 INFO L225 Difference]: With dead ends: 2373 [2021-08-06 20:46:19,170 INFO L226 Difference]: Without dead ends: 2367 [2021-08-06 20:46:19,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:46:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-06 20:46:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2223. [2021-08-06 20:46:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.332583258325833) internal successors, (5183), 2222 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 5183 transitions. [2021-08-06 20:46:19,193 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 5183 transitions. Word has length 28 [2021-08-06 20:46:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:19,193 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 5183 transitions. [2021-08-06 20:46:19,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 5183 transitions. [2021-08-06 20:46:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:19,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:19,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:19,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:19,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 20:46:19,397 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1444759764, now seen corresponding path program 42 times [2021-08-06 20:46:19,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:19,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464447508] [2021-08-06 20:46:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:19,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:19,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464447508] [2021-08-06 20:46:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464447508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:19,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954509133] [2021-08-06 20:46:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:19,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:19,449 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:19,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:46:21,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:21,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:21,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:21,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:21,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954509133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:21,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:21,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:46:21,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451613051] [2021-08-06 20:46:21,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:46:21,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:46:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:46:21,217 INFO L87 Difference]: Start difference. First operand 2223 states and 5183 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:21,428 INFO L93 Difference]: Finished difference Result 2346 states and 5330 transitions. [2021-08-06 20:46:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:46:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:21,443 INFO L225 Difference]: With dead ends: 2346 [2021-08-06 20:46:21,444 INFO L226 Difference]: Without dead ends: 2346 [2021-08-06 20:46:21,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:46:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-08-06 20:46:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2181. [2021-08-06 20:46:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.3334862385321102) internal successors, (5087), 2180 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 5087 transitions. [2021-08-06 20:46:21,466 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 5087 transitions. Word has length 28 [2021-08-06 20:46:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:21,466 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 5087 transitions. [2021-08-06 20:46:21,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 5087 transitions. [2021-08-06 20:46:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:21,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:21,469 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:21,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:21,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 20:46:21,669 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1802611984, now seen corresponding path program 43 times [2021-08-06 20:46:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:21,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704549585] [2021-08-06 20:46:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:21,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:21,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:21,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704549585] [2021-08-06 20:46:21,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704549585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:21,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175124892] [2021-08-06 20:46:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:21,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:21,732 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:21,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:46:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:23,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:23,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175124892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:23,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:23,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:46:23,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945174230] [2021-08-06 20:46:23,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:46:23,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:46:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:46:23,497 INFO L87 Difference]: Start difference. First operand 2181 states and 5087 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:23,800 INFO L93 Difference]: Finished difference Result 2448 states and 5621 transitions. [2021-08-06 20:46:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:46:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:23,803 INFO L225 Difference]: With dead ends: 2448 [2021-08-06 20:46:23,803 INFO L226 Difference]: Without dead ends: 2448 [2021-08-06 20:46:23,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:46:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-06 20:46:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2247. [2021-08-06 20:46:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 2.320124666073019) internal successors, (5211), 2246 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 5211 transitions. [2021-08-06 20:46:23,827 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 5211 transitions. Word has length 28 [2021-08-06 20:46:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 5211 transitions. [2021-08-06 20:46:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 5211 transitions. [2021-08-06 20:46:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:23,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:23,830 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:23,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 20:46:24,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 20:46:24,030 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash 317593192, now seen corresponding path program 44 times [2021-08-06 20:46:24,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:24,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470047281] [2021-08-06 20:46:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:24,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:24,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:24,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470047281] [2021-08-06 20:46:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470047281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:24,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545257047] [2021-08-06 20:46:24,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:24,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:24,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:24,085 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:24,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:46:25,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:25,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:25,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:25,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545257047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:25,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:25,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:46:25,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233372285] [2021-08-06 20:46:25,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:25,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:25,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:25,947 INFO L87 Difference]: Start difference. First operand 2247 states and 5211 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:26,595 INFO L93 Difference]: Finished difference Result 4605 states and 9750 transitions. [2021-08-06 20:46:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:46:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:26,601 INFO L225 Difference]: With dead ends: 4605 [2021-08-06 20:46:26,601 INFO L226 Difference]: Without dead ends: 4605 [2021-08-06 20:46:26,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:46:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-08-06 20:46:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2321. [2021-08-06 20:46:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.3224137931034483) internal successors, (5388), 2320 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 5388 transitions. [2021-08-06 20:46:26,636 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 5388 transitions. Word has length 28 [2021-08-06 20:46:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:26,637 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 5388 transitions. [2021-08-06 20:46:26,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 5388 transitions. [2021-08-06 20:46:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:26,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:26,639 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:26,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:26,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 20:46:26,840 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1869804056, now seen corresponding path program 25 times [2021-08-06 20:46:26,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:26,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755816742] [2021-08-06 20:46:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:26,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755816742] [2021-08-06 20:46:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755816742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:26,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903655875] [2021-08-06 20:46:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:26,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:26,899 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:26,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:46:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:28,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:28,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:28,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903655875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:28,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:28,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:46:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75429319] [2021-08-06 20:46:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:28,747 INFO L87 Difference]: Start difference. First operand 2321 states and 5388 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:29,229 INFO L93 Difference]: Finished difference Result 4327 states and 9159 transitions. [2021-08-06 20:46:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:46:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-08-06 20:46:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:29,234 INFO L225 Difference]: With dead ends: 4327 [2021-08-06 20:46:29,234 INFO L226 Difference]: Without dead ends: 4327 [2021-08-06 20:46:29,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:46:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4327 states. [2021-08-06 20:46:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4327 to 2319. [2021-08-06 20:46:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 2.3218291630716132) internal successors, (5382), 2318 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 5382 transitions. [2021-08-06 20:46:29,267 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 5382 transitions. Word has length 28 [2021-08-06 20:46:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:29,267 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 5382 transitions. [2021-08-06 20:46:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 5382 transitions. [2021-08-06 20:46:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:29,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:29,270 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:29,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 20:46:29,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:29,471 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1360771736, now seen corresponding path program 45 times [2021-08-06 20:46:29,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:29,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70579145] [2021-08-06 20:46:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:29,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:29,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70579145] [2021-08-06 20:46:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70579145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028664389] [2021-08-06 20:46:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:29,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:29,521 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:46:31,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:31,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:31,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:31,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028664389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:31,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279531112] [2021-08-06 20:46:31,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:31,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:31,419 INFO L87 Difference]: Start difference. First operand 2319 states and 5382 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:31,688 INFO L93 Difference]: Finished difference Result 3032 states and 6689 transitions. [2021-08-06 20:46:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:46:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:31,692 INFO L225 Difference]: With dead ends: 3032 [2021-08-06 20:46:31,692 INFO L226 Difference]: Without dead ends: 3026 [2021-08-06 20:46:31,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:46:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-08-06 20:46:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2640. [2021-08-06 20:46:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.3289124668435015) internal successors, (6146), 2639 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6146 transitions. [2021-08-06 20:46:31,723 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6146 transitions. Word has length 28 [2021-08-06 20:46:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:31,723 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 6146 transitions. [2021-08-06 20:46:31,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6146 transitions. [2021-08-06 20:46:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:31,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:31,726 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:31,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:31,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:31,927 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1084447976, now seen corresponding path program 26 times [2021-08-06 20:46:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:31,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729578155] [2021-08-06 20:46:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:31,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:31,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:31,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729578155] [2021-08-06 20:46:31,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729578155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:31,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855999098] [2021-08-06 20:46:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:31,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:31,980 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:31,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:46:33,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855999098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:33,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:33,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:46:33,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348177491] [2021-08-06 20:46:33,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:33,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:33,822 INFO L87 Difference]: Start difference. First operand 2640 states and 6146 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:34,073 INFO L93 Difference]: Finished difference Result 3136 states and 7017 transitions. [2021-08-06 20:46:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:46:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:34,077 INFO L225 Difference]: With dead ends: 3136 [2021-08-06 20:46:34,078 INFO L226 Difference]: Without dead ends: 3130 [2021-08-06 20:46:34,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:46:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-08-06 20:46:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 2575. [2021-08-06 20:46:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 2.3271173271173273) internal successors, (5990), 2574 states have internal predecessors, (5990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 5990 transitions. [2021-08-06 20:46:34,122 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 5990 transitions. Word has length 28 [2021-08-06 20:46:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:34,122 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 5990 transitions. [2021-08-06 20:46:34,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 5990 transitions. [2021-08-06 20:46:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:34,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:34,125 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:34,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 20:46:34,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:34,325 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash 169344360, now seen corresponding path program 46 times [2021-08-06 20:46:34,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:34,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893647757] [2021-08-06 20:46:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:34,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:34,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:34,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893647757] [2021-08-06 20:46:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893647757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:34,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704739691] [2021-08-06 20:46:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:34,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:34,380 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:34,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:46:36,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:36,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:36,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:36,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704739691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:36,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:36,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:36,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26963192] [2021-08-06 20:46:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:36,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:36,242 INFO L87 Difference]: Start difference. First operand 2575 states and 5990 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:36,543 INFO L93 Difference]: Finished difference Result 2898 states and 6432 transitions. [2021-08-06 20:46:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:46:36,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:36,546 INFO L225 Difference]: With dead ends: 2898 [2021-08-06 20:46:36,546 INFO L226 Difference]: Without dead ends: 2892 [2021-08-06 20:46:36,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:46:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-08-06 20:46:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2551. [2021-08-06 20:46:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 2.3258823529411763) internal successors, (5931), 2550 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 5931 transitions. [2021-08-06 20:46:36,576 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 5931 transitions. Word has length 28 [2021-08-06 20:46:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:36,576 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 5931 transitions. [2021-08-06 20:46:36,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 5931 transitions. [2021-08-06 20:46:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:36,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:36,579 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:36,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 20:46:36,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 20:46:36,781 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2138168680, now seen corresponding path program 47 times [2021-08-06 20:46:36,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:36,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902411489] [2021-08-06 20:46:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:36,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:36,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:36,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902411489] [2021-08-06 20:46:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902411489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:36,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993650639] [2021-08-06 20:46:36,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:36,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:36,832 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:36,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:46:38,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:38,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:38,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993650639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:38,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:46:38,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923600325] [2021-08-06 20:46:38,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:38,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:38,714 INFO L87 Difference]: Start difference. First operand 2551 states and 5931 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:39,000 INFO L93 Difference]: Finished difference Result 2996 states and 6655 transitions. [2021-08-06 20:46:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:46:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:39,003 INFO L225 Difference]: With dead ends: 2996 [2021-08-06 20:46:39,003 INFO L226 Difference]: Without dead ends: 2992 [2021-08-06 20:46:39,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:46:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-08-06 20:46:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2551. [2021-08-06 20:46:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 2.3250980392156864) internal successors, (5929), 2550 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 5929 transitions. [2021-08-06 20:46:39,048 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 5929 transitions. Word has length 28 [2021-08-06 20:46:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:39,048 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 5929 transitions. [2021-08-06 20:46:39,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 5929 transitions. [2021-08-06 20:46:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:39,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:39,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:39,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 20:46:39,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:39,252 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash 565783912, now seen corresponding path program 48 times [2021-08-06 20:46:39,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:39,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756207221] [2021-08-06 20:46:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:39,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:39,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:39,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756207221] [2021-08-06 20:46:39,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756207221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:39,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426126083] [2021-08-06 20:46:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:39,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:39,321 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:39,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:46:41,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:41,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:41,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426126083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:41,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:41,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:46:41,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851078869] [2021-08-06 20:46:41,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:41,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:41,189 INFO L87 Difference]: Start difference. First operand 2551 states and 5929 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:41,660 INFO L93 Difference]: Finished difference Result 3093 states and 6910 transitions. [2021-08-06 20:46:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:46:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:41,664 INFO L225 Difference]: With dead ends: 3093 [2021-08-06 20:46:41,664 INFO L226 Difference]: Without dead ends: 3093 [2021-08-06 20:46:41,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:46:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-08-06 20:46:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2523. [2021-08-06 20:46:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.330689928628073) internal successors, (5878), 2522 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 5878 transitions. [2021-08-06 20:46:41,691 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 5878 transitions. Word has length 28 [2021-08-06 20:46:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:41,691 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 5878 transitions. [2021-08-06 20:46:41,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 5878 transitions. [2021-08-06 20:46:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:41,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:41,694 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:41,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 20:46:41,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:41,895 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1859471148, now seen corresponding path program 49 times [2021-08-06 20:46:41,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:41,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487001069] [2021-08-06 20:46:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:41,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:41,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:41,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487001069] [2021-08-06 20:46:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487001069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:41,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023924304] [2021-08-06 20:46:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:41,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:41,944 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:46:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:43,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:43,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:43,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023924304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:43,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:43,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:43,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337864510] [2021-08-06 20:46:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:43,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:43,820 INFO L87 Difference]: Start difference. First operand 2523 states and 5878 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:44,122 INFO L93 Difference]: Finished difference Result 3227 states and 7181 transitions. [2021-08-06 20:46:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:46:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:44,126 INFO L225 Difference]: With dead ends: 3227 [2021-08-06 20:46:44,126 INFO L226 Difference]: Without dead ends: 3223 [2021-08-06 20:46:44,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:46:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-08-06 20:46:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2676. [2021-08-06 20:46:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 2.3416822429906543) internal successors, (6264), 2675 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 6264 transitions. [2021-08-06 20:46:44,167 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 6264 transitions. Word has length 28 [2021-08-06 20:46:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 6264 transitions. [2021-08-06 20:46:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 6264 transitions. [2021-08-06 20:46:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:44,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:44,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:44,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 20:46:44,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 20:46:44,371 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 287086380, now seen corresponding path program 50 times [2021-08-06 20:46:44,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:44,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355278639] [2021-08-06 20:46:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:44,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:44,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:44,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355278639] [2021-08-06 20:46:44,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355278639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:44,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579419510] [2021-08-06 20:46:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:44,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:44,433 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:44,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:46:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:46,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:46,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:46,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579419510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:46,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:46,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449503238] [2021-08-06 20:46:46,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:46,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:46,295 INFO L87 Difference]: Start difference. First operand 2676 states and 6264 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:46,730 INFO L93 Difference]: Finished difference Result 2968 states and 6681 transitions. [2021-08-06 20:46:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:46:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:46,734 INFO L225 Difference]: With dead ends: 2968 [2021-08-06 20:46:46,734 INFO L226 Difference]: Without dead ends: 2968 [2021-08-06 20:46:46,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:46:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-08-06 20:46:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2659. [2021-08-06 20:46:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 2.3416102332580886) internal successors, (6224), 2658 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 6224 transitions. [2021-08-06 20:46:46,763 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 6224 transitions. Word has length 28 [2021-08-06 20:46:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:46,763 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 6224 transitions. [2021-08-06 20:46:46,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 6224 transitions. [2021-08-06 20:46:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:46,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:46,766 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:46,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 20:46:46,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 20:46:46,969 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash -70765840, now seen corresponding path program 51 times [2021-08-06 20:46:46,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:46,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497484043] [2021-08-06 20:46:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:46,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:47,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497484043] [2021-08-06 20:46:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497484043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572272045] [2021-08-06 20:46:47,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:47,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:47,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:47,020 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:47,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:46:48,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:46:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:48,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:48,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:48,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:48,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572272045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:48,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:48,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632316965] [2021-08-06 20:46:48,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:48,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:48,902 INFO L87 Difference]: Start difference. First operand 2659 states and 6224 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:49,384 INFO L93 Difference]: Finished difference Result 3513 states and 7916 transitions. [2021-08-06 20:46:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:46:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:49,388 INFO L225 Difference]: With dead ends: 3513 [2021-08-06 20:46:49,388 INFO L226 Difference]: Without dead ends: 3513 [2021-08-06 20:46:49,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:46:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-08-06 20:46:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2781. [2021-08-06 20:46:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 2.337410071942446) internal successors, (6498), 2780 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 6498 transitions. [2021-08-06 20:46:49,417 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 6498 transitions. Word has length 28 [2021-08-06 20:46:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 2781 states and 6498 transitions. [2021-08-06 20:46:49,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 6498 transitions. [2021-08-06 20:46:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:49,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:49,420 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:49,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 20:46:49,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:49,621 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1294751916, now seen corresponding path program 27 times [2021-08-06 20:46:49,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:49,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056280890] [2021-08-06 20:46:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:49,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:49,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:49,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056280890] [2021-08-06 20:46:49,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056280890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:49,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061192914] [2021-08-06 20:46:49,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:49,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:49,675 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:49,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:46:51,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:46:51,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:51,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:51,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:51,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061192914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:51,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:51,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:46:51,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139044912] [2021-08-06 20:46:51,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:51,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:51,634 INFO L87 Difference]: Start difference. First operand 2781 states and 6498 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:52,582 INFO L93 Difference]: Finished difference Result 9619 states and 19909 transitions. [2021-08-06 20:46:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:46:52,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:52,595 INFO L225 Difference]: With dead ends: 9619 [2021-08-06 20:46:52,595 INFO L226 Difference]: Without dead ends: 9619 [2021-08-06 20:46:52,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:46:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2021-08-06 20:46:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 3874. [2021-08-06 20:46:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 3873 states have (on average 2.3764523625096823) internal successors, (9204), 3873 states have internal predecessors, (9204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 9204 transitions. [2021-08-06 20:46:52,707 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 9204 transitions. Word has length 28 [2021-08-06 20:46:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 3874 states and 9204 transitions. [2021-08-06 20:46:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 9204 transitions. [2021-08-06 20:46:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:52,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:52,711 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:52,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 20:46:52,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:52,911 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1476783376, now seen corresponding path program 52 times [2021-08-06 20:46:52,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:52,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034528579] [2021-08-06 20:46:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:52,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:52,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:52,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034528579] [2021-08-06 20:46:52,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034528579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:52,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706999998] [2021-08-06 20:46:52,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:52,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:52,966 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:52,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:46:54,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:54,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:54,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:54,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706999998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:54,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:54,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:46:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619213498] [2021-08-06 20:46:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:54,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:54,904 INFO L87 Difference]: Start difference. First operand 3874 states and 9204 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:55,476 INFO L93 Difference]: Finished difference Result 4815 states and 11088 transitions. [2021-08-06 20:46:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:46:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:55,481 INFO L225 Difference]: With dead ends: 4815 [2021-08-06 20:46:55,481 INFO L226 Difference]: Without dead ends: 4815 [2021-08-06 20:46:55,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:46:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2021-08-06 20:46:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 4018. [2021-08-06 20:46:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4017 states have (on average 2.3594722429673887) internal successors, (9478), 4017 states have internal predecessors, (9478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 9478 transitions. [2021-08-06 20:46:55,526 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 9478 transitions. Word has length 28 [2021-08-06 20:46:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:55,527 INFO L470 AbstractCegarLoop]: Abstraction has 4018 states and 9478 transitions. [2021-08-06 20:46:55,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 9478 transitions. [2021-08-06 20:46:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:55,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:55,530 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:55,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 20:46:55,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 20:46:55,745 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash -741118356, now seen corresponding path program 53 times [2021-08-06 20:46:55,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:55,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031551582] [2021-08-06 20:46:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:55,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:55,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:55,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031551582] [2021-08-06 20:46:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031551582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:55,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286702073] [2021-08-06 20:46:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:55,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:55,806 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:55,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:46:57,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:46:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:57,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:57,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:57,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286702073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:57,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:57,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:46:57,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631682436] [2021-08-06 20:46:57,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:57,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:57,788 INFO L87 Difference]: Start difference. First operand 4018 states and 9478 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:58,201 INFO L93 Difference]: Finished difference Result 7173 states and 15368 transitions. [2021-08-06 20:46:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:46:58,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:58,210 INFO L225 Difference]: With dead ends: 7173 [2021-08-06 20:46:58,210 INFO L226 Difference]: Without dead ends: 7173 [2021-08-06 20:46:58,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:46:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2021-08-06 20:46:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4297. [2021-08-06 20:46:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 2.3696461824953445) internal successors, (10180), 4296 states have internal predecessors, (10180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 10180 transitions. [2021-08-06 20:46:58,281 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 10180 transitions. Word has length 28 [2021-08-06 20:46:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:58,281 INFO L470 AbstractCegarLoop]: Abstraction has 4297 states and 10180 transitions. [2021-08-06 20:46:58,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 10180 transitions. [2021-08-06 20:46:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:58,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:58,286 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:58,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:58,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:58,507 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2062354028, now seen corresponding path program 54 times [2021-08-06 20:46:58,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:58,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884871044] [2021-08-06 20:46:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:58,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:58,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:58,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884871044] [2021-08-06 20:46:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884871044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:58,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814736937] [2021-08-06 20:46:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:58,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:58,567 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:58,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:47:00,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:47:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:00,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:00,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814736937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:00,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:47:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970893763] [2021-08-06 20:47:00,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:47:00,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:47:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:00,600 INFO L87 Difference]: Start difference. First operand 4297 states and 10180 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:01,248 INFO L93 Difference]: Finished difference Result 7583 states and 16111 transitions. [2021-08-06 20:47:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:47:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:01,258 INFO L225 Difference]: With dead ends: 7583 [2021-08-06 20:47:01,258 INFO L226 Difference]: Without dead ends: 7583 [2021-08-06 20:47:01,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:47:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2021-08-06 20:47:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 4194. [2021-08-06 20:47:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4194 states, 4193 states have (on average 2.352730741712378) internal successors, (9865), 4193 states have internal predecessors, (9865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 9865 transitions. [2021-08-06 20:47:01,323 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 9865 transitions. Word has length 28 [2021-08-06 20:47:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:01,324 INFO L470 AbstractCegarLoop]: Abstraction has 4194 states and 9865 transitions. [2021-08-06 20:47:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 9865 transitions. [2021-08-06 20:47:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:01,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:01,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:01,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:01,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:01,528 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash -47923992, now seen corresponding path program 55 times [2021-08-06 20:47:01,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:01,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878162169] [2021-08-06 20:47:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:01,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:01,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:01,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878162169] [2021-08-06 20:47:01,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878162169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:01,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273435818] [2021-08-06 20:47:01,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:01,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:01,576 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:01,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:47:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:47:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:03,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:03,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:47:03,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273435818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:03,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:03,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:47:03,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907842050] [2021-08-06 20:47:03,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:03,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:03,546 INFO L87 Difference]: Start difference. First operand 4194 states and 9865 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:03,629 INFO L93 Difference]: Finished difference Result 5475 states and 12543 transitions. [2021-08-06 20:47:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:47:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:03,636 INFO L225 Difference]: With dead ends: 5475 [2021-08-06 20:47:03,636 INFO L226 Difference]: Without dead ends: 5473 [2021-08-06 20:47:03,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:47:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-08-06 20:47:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4296. [2021-08-06 20:47:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 2.3552968568102446) internal successors, (10116), 4295 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 10116 transitions. [2021-08-06 20:47:03,710 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 10116 transitions. Word has length 28 [2021-08-06 20:47:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:03,710 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 10116 transitions. [2021-08-06 20:47:03,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 10116 transitions. [2021-08-06 20:47:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:03,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:03,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:03,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 20:47:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 20:47:03,915 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1897671576, now seen corresponding path program 56 times [2021-08-06 20:47:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:03,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845413956] [2021-08-06 20:47:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:03,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:03,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:03,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845413956] [2021-08-06 20:47:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845413956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167288784] [2021-08-06 20:47:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:03,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:03,977 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:47:05,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:05,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:05,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:05,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167288784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:05,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:05,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:47:05,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98241861] [2021-08-06 20:47:05,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:47:05,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:47:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:47:05,936 INFO L87 Difference]: Start difference. First operand 4296 states and 10116 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:06,057 INFO L93 Difference]: Finished difference Result 6096 states and 13920 transitions. [2021-08-06 20:47:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:47:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:06,066 INFO L225 Difference]: With dead ends: 6096 [2021-08-06 20:47:06,066 INFO L226 Difference]: Without dead ends: 6084 [2021-08-06 20:47:06,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:47:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6084 states. [2021-08-06 20:47:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 5638. [2021-08-06 20:47:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 2.336703920525102) internal successors, (13172), 5637 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 13172 transitions. [2021-08-06 20:47:06,140 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 13172 transitions. Word has length 28 [2021-08-06 20:47:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:06,140 INFO L470 AbstractCegarLoop]: Abstraction has 5638 states and 13172 transitions. [2021-08-06 20:47:06,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 13172 transitions. [2021-08-06 20:47:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:06,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:06,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:06,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 20:47:06,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:06,347 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash -843950872, now seen corresponding path program 57 times [2021-08-06 20:47:06,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:06,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973248837] [2021-08-06 20:47:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:06,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:06,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:06,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973248837] [2021-08-06 20:47:06,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973248837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:06,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720992679] [2021-08-06 20:47:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:06,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:06,411 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:47:08,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:47:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:47:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:08,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:08,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:47:08,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720992679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:08,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:08,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:47:08,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431705141] [2021-08-06 20:47:08,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:08,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:08,380 INFO L87 Difference]: Start difference. First operand 5638 states and 13172 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:08,477 INFO L93 Difference]: Finished difference Result 6706 states and 15321 transitions. [2021-08-06 20:47:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:47:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:08,485 INFO L225 Difference]: With dead ends: 6706 [2021-08-06 20:47:08,485 INFO L226 Difference]: Without dead ends: 6706 [2021-08-06 20:47:08,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2021-08-06 20:47:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 5446. [2021-08-06 20:47:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 2.323048668503214) internal successors, (12649), 5445 states have internal predecessors, (12649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 12649 transitions. [2021-08-06 20:47:08,553 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 12649 transitions. Word has length 28 [2021-08-06 20:47:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:08,553 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 12649 transitions. [2021-08-06 20:47:08,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 12649 transitions. [2021-08-06 20:47:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:08,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:08,558 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:08,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 20:47:08,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:08,759 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1591637096, now seen corresponding path program 58 times [2021-08-06 20:47:08,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:08,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793275152] [2021-08-06 20:47:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:08,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:08,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:08,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793275152] [2021-08-06 20:47:08,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793275152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:08,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282079834] [2021-08-06 20:47:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:08,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:08,835 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:08,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:47:10,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:10,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:10,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:10,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282079834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:10,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:10,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:47:10,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688693950] [2021-08-06 20:47:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:10,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:10,775 INFO L87 Difference]: Start difference. First operand 5446 states and 12649 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:10,912 INFO L93 Difference]: Finished difference Result 5633 states and 12843 transitions. [2021-08-06 20:47:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:47:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:10,919 INFO L225 Difference]: With dead ends: 5633 [2021-08-06 20:47:10,919 INFO L226 Difference]: Without dead ends: 5633 [2021-08-06 20:47:10,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:47:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5633 states. [2021-08-06 20:47:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5633 to 5256. [2021-08-06 20:47:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 2.314557564224548) internal successors, (12163), 5255 states have internal predecessors, (12163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 12163 transitions. [2021-08-06 20:47:10,976 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 12163 transitions. Word has length 28 [2021-08-06 20:47:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:10,976 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 12163 transitions. [2021-08-06 20:47:10,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 12163 transitions. [2021-08-06 20:47:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:10,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:10,981 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:11,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:11,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 20:47:11,197 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1097704024, now seen corresponding path program 59 times [2021-08-06 20:47:11,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:11,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736415268] [2021-08-06 20:47:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:11,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:11,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:11,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736415268] [2021-08-06 20:47:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736415268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:11,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331330980] [2021-08-06 20:47:11,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:11,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:11,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:11,284 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:11,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:47:13,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:47:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:47:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:13,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:13,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:47:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331330980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:13,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:13,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:47:13,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113480988] [2021-08-06 20:47:13,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:47:13,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:47:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:47:13,272 INFO L87 Difference]: Start difference. First operand 5256 states and 12163 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:13,368 INFO L93 Difference]: Finished difference Result 5464 states and 12594 transitions. [2021-08-06 20:47:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:47:13,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:13,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:13,376 INFO L225 Difference]: With dead ends: 5464 [2021-08-06 20:47:13,376 INFO L226 Difference]: Without dead ends: 5464 [2021-08-06 20:47:13,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5464 states. [2021-08-06 20:47:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5464 to 5229. [2021-08-06 20:47:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 5228 states have (on average 2.3135042081101758) internal successors, (12095), 5228 states have internal predecessors, (12095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 12095 transitions. [2021-08-06 20:47:13,483 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 12095 transitions. Word has length 28 [2021-08-06 20:47:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:13,483 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 12095 transitions. [2021-08-06 20:47:13,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 12095 transitions. [2021-08-06 20:47:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:13,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:13,488 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:13,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:13,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:13,689 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 177438376, now seen corresponding path program 60 times [2021-08-06 20:47:13,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:13,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775251934] [2021-08-06 20:47:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:13,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:13,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:13,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775251934] [2021-08-06 20:47:13,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775251934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:13,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828992469] [2021-08-06 20:47:13,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:13,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:13,741 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:47:15,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:47:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:47:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:15,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:15,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828992469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:15,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:15,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:47:15,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630225694] [2021-08-06 20:47:15,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:47:15,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:47:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:47:15,772 INFO L87 Difference]: Start difference. First operand 5229 states and 12095 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:15,879 INFO L93 Difference]: Finished difference Result 5768 states and 13221 transitions. [2021-08-06 20:47:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:47:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:15,886 INFO L225 Difference]: With dead ends: 5768 [2021-08-06 20:47:15,886 INFO L226 Difference]: Without dead ends: 5768 [2021-08-06 20:47:15,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:47:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2021-08-06 20:47:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 5455. [2021-08-06 20:47:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.304913824715805) internal successors, (12571), 5454 states have internal predecessors, (12571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 12571 transitions. [2021-08-06 20:47:15,950 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 12571 transitions. Word has length 28 [2021-08-06 20:47:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 12571 transitions. [2021-08-06 20:47:15,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 12571 transitions. [2021-08-06 20:47:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:15,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:15,956 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:15,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:16,169 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1705304104, now seen corresponding path program 61 times [2021-08-06 20:47:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:16,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938024682] [2021-08-06 20:47:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:16,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:16,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:16,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938024682] [2021-08-06 20:47:16,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938024682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:16,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783627742] [2021-08-06 20:47:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:16,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:16,226 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:16,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:47:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:18,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:18,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:18,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783627742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:18,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:18,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:47:18,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540379302] [2021-08-06 20:47:18,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:47:18,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:18,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:47:18,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:18,300 INFO L87 Difference]: Start difference. First operand 5455 states and 12571 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:18,831 INFO L93 Difference]: Finished difference Result 13358 states and 28122 transitions. [2021-08-06 20:47:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:47:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:18,848 INFO L225 Difference]: With dead ends: 13358 [2021-08-06 20:47:18,848 INFO L226 Difference]: Without dead ends: 13358 [2021-08-06 20:47:18,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:47:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-08-06 20:47:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 7506. [2021-08-06 20:47:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 2.3264490339773483) internal successors, (17460), 7505 states have internal predecessors, (17460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 17460 transitions. [2021-08-06 20:47:18,972 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 17460 transitions. Word has length 28 [2021-08-06 20:47:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:18,972 INFO L470 AbstractCegarLoop]: Abstraction has 7506 states and 17460 transitions. [2021-08-06 20:47:18,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 17460 transitions. [2021-08-06 20:47:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:18,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:18,980 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:19,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:19,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:19,193 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:19,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1963126568, now seen corresponding path program 62 times [2021-08-06 20:47:19,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:19,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8373327] [2021-08-06 20:47:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:19,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:19,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:19,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8373327] [2021-08-06 20:47:19,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8373327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:19,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682544252] [2021-08-06 20:47:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:19,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:19,262 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:19,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:47:21,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:21,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:21,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682544252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:21,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:21,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:47:21,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345903149] [2021-08-06 20:47:21,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:21,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:21,342 INFO L87 Difference]: Start difference. First operand 7506 states and 17460 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:21,500 INFO L93 Difference]: Finished difference Result 9003 states and 20669 transitions. [2021-08-06 20:47:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:47:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:21,511 INFO L225 Difference]: With dead ends: 9003 [2021-08-06 20:47:21,511 INFO L226 Difference]: Without dead ends: 8999 [2021-08-06 20:47:21,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:47:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8999 states. [2021-08-06 20:47:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8999 to 8865. [2021-08-06 20:47:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 2.3155460288808665) internal successors, (20525), 8864 states have internal predecessors, (20525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 20525 transitions. [2021-08-06 20:47:21,640 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 20525 transitions. Word has length 28 [2021-08-06 20:47:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 8865 states and 20525 transitions. [2021-08-06 20:47:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 20525 transitions. [2021-08-06 20:47:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:21,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:21,649 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:21,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 20:47:21,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 20:47:21,856 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash 390741800, now seen corresponding path program 63 times [2021-08-06 20:47:21,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:21,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851649200] [2021-08-06 20:47:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:21,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:21,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:21,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851649200] [2021-08-06 20:47:21,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851649200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:21,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230157626] [2021-08-06 20:47:21,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:21,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:21,916 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:47:23,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:47:23,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:23,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:23,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:23,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230157626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:23,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:23,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:47:23,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059576557] [2021-08-06 20:47:23,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:23,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:23,963 INFO L87 Difference]: Start difference. First operand 8865 states and 20525 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:24,135 INFO L93 Difference]: Finished difference Result 9020 states and 20714 transitions. [2021-08-06 20:47:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:47:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:24,148 INFO L225 Difference]: With dead ends: 9020 [2021-08-06 20:47:24,148 INFO L226 Difference]: Without dead ends: 9020 [2021-08-06 20:47:24,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:47:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-08-06 20:47:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 8802. [2021-08-06 20:47:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8802 states, 8801 states have (on average 2.3137143506419724) internal successors, (20363), 8801 states have internal predecessors, (20363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 20363 transitions. [2021-08-06 20:47:24,268 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 20363 transitions. Word has length 28 [2021-08-06 20:47:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:24,268 INFO L470 AbstractCegarLoop]: Abstraction has 8802 states and 20363 transitions. [2021-08-06 20:47:24,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 20363 transitions. [2021-08-06 20:47:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:24,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:24,278 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:24,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:24,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:24,493 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 32889580, now seen corresponding path program 64 times [2021-08-06 20:47:24,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:24,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563997130] [2021-08-06 20:47:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:24,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:24,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:24,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563997130] [2021-08-06 20:47:24,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563997130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:24,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21052001] [2021-08-06 20:47:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:24,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:24,566 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:24,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:47:26,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:26,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:26,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:26,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21052001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:26,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:26,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:47:26,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036648249] [2021-08-06 20:47:26,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:26,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:26,697 INFO L87 Difference]: Start difference. First operand 8802 states and 20363 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:26,895 INFO L93 Difference]: Finished difference Result 9036 states and 20823 transitions. [2021-08-06 20:47:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:47:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:26,907 INFO L225 Difference]: With dead ends: 9036 [2021-08-06 20:47:26,907 INFO L226 Difference]: Without dead ends: 9036 [2021-08-06 20:47:26,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:47:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-08-06 20:47:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 8930. [2021-08-06 20:47:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 2.311681039310113) internal successors, (20641), 8929 states have internal predecessors, (20641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 20641 transitions. [2021-08-06 20:47:27,043 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 20641 transitions. Word has length 28 [2021-08-06 20:47:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:27,044 INFO L470 AbstractCegarLoop]: Abstraction has 8930 states and 20641 transitions. [2021-08-06 20:47:27,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 20641 transitions. [2021-08-06 20:47:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:27,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:27,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:27,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:27,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:27,253 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 832715244, now seen corresponding path program 65 times [2021-08-06 20:47:27,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:27,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722406572] [2021-08-06 20:47:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:27,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:27,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:27,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722406572] [2021-08-06 20:47:27,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722406572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:27,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359356209] [2021-08-06 20:47:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:27,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:27,315 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:47:29,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:47:29,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:29,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:29,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:29,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359356209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:29,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:29,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:47:29,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744374868] [2021-08-06 20:47:29,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:47:29,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:47:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:47:29,435 INFO L87 Difference]: Start difference. First operand 8930 states and 20641 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:29,680 INFO L93 Difference]: Finished difference Result 9300 states and 21425 transitions. [2021-08-06 20:47:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:47:29,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:29,692 INFO L225 Difference]: With dead ends: 9300 [2021-08-06 20:47:29,692 INFO L226 Difference]: Without dead ends: 9300 [2021-08-06 20:47:29,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:47:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9300 states. [2021-08-06 20:47:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9300 to 9003. [2021-08-06 20:47:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 2.311153077093979) internal successors, (20805), 9002 states have internal predecessors, (20805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 20805 transitions. [2021-08-06 20:47:29,804 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 20805 transitions. Word has length 28 [2021-08-06 20:47:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:29,804 INFO L470 AbstractCegarLoop]: Abstraction has 9003 states and 20805 transitions. [2021-08-06 20:47:29,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 20805 transitions. [2021-08-06 20:47:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:29,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:29,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:29,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 20:47:30,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:30,029 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -180039896, now seen corresponding path program 66 times [2021-08-06 20:47:30,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:30,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204890872] [2021-08-06 20:47:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:30,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:30,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204890872] [2021-08-06 20:47:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204890872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578543089] [2021-08-06 20:47:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:30,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:30,094 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:47:32,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:47:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:32,170 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:32,171 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578543089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:32,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:47:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404240896] [2021-08-06 20:47:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:32,197 INFO L87 Difference]: Start difference. First operand 9003 states and 20805 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:32,362 INFO L93 Difference]: Finished difference Result 10062 states and 22885 transitions. [2021-08-06 20:47:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:47:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:32,376 INFO L225 Difference]: With dead ends: 10062 [2021-08-06 20:47:32,376 INFO L226 Difference]: Without dead ends: 10058 [2021-08-06 20:47:32,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:47:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-08-06 20:47:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 9848. [2021-08-06 20:47:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9848 states, 9847 states have (on average 2.3015131512135674) internal successors, (22663), 9847 states have internal predecessors, (22663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9848 states to 9848 states and 22663 transitions. [2021-08-06 20:47:32,499 INFO L78 Accepts]: Start accepts. Automaton has 9848 states and 22663 transitions. Word has length 28 [2021-08-06 20:47:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:32,499 INFO L470 AbstractCegarLoop]: Abstraction has 9848 states and 22663 transitions. [2021-08-06 20:47:32,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9848 states and 22663 transitions. [2021-08-06 20:47:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:32,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:32,509 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:32,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 20:47:32,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:32,709 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1752424664, now seen corresponding path program 67 times [2021-08-06 20:47:32,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:32,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435983126] [2021-08-06 20:47:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:32,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:32,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435983126] [2021-08-06 20:47:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435983126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667715110] [2021-08-06 20:47:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:32,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:32,774 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:32,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:47:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:34,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:34,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667715110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:34,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:47:34,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142732744] [2021-08-06 20:47:34,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:34,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:34,907 INFO L87 Difference]: Start difference. First operand 9848 states and 22663 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:35,147 INFO L93 Difference]: Finished difference Result 10095 states and 22972 transitions. [2021-08-06 20:47:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:47:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:35,159 INFO L225 Difference]: With dead ends: 10095 [2021-08-06 20:47:35,159 INFO L226 Difference]: Without dead ends: 10095 [2021-08-06 20:47:35,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:47:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10095 states. [2021-08-06 20:47:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10095 to 8536. [2021-08-06 20:47:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8536 states, 8535 states have (on average 2.3102519039250144) internal successors, (19718), 8535 states have internal predecessors, (19718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8536 states to 8536 states and 19718 transitions. [2021-08-06 20:47:35,279 INFO L78 Accepts]: Start accepts. Automaton has 8536 states and 19718 transitions. Word has length 28 [2021-08-06 20:47:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 8536 states and 19718 transitions. [2021-08-06 20:47:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8536 states and 19718 transitions. [2021-08-06 20:47:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:35,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:35,288 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:35,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 20:47:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 20:47:35,488 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1310451220, now seen corresponding path program 68 times [2021-08-06 20:47:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464530840] [2021-08-06 20:47:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:35,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:35,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:35,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464530840] [2021-08-06 20:47:35,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464530840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:35,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413522903] [2021-08-06 20:47:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:35,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:35,558 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:35,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:47:37,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:37,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:37,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:37,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413522903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:37,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:37,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:47:37,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728099743] [2021-08-06 20:47:37,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:37,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:37,791 INFO L87 Difference]: Start difference. First operand 8536 states and 19718 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:37,989 INFO L93 Difference]: Finished difference Result 8711 states and 20076 transitions. [2021-08-06 20:47:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:47:37,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:38,003 INFO L225 Difference]: With dead ends: 8711 [2021-08-06 20:47:38,003 INFO L226 Difference]: Without dead ends: 8711 [2021-08-06 20:47:38,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:47:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8711 states. [2021-08-06 20:47:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8711 to 8526. [2021-08-06 20:47:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 8525 states have (on average 2.310615835777126) internal successors, (19698), 8525 states have internal predecessors, (19698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 19698 transitions. [2021-08-06 20:47:38,109 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 19698 transitions. Word has length 28 [2021-08-06 20:47:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:38,110 INFO L470 AbstractCegarLoop]: Abstraction has 8526 states and 19698 transitions. [2021-08-06 20:47:38,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 19698 transitions. [2021-08-06 20:47:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:38,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:38,118 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 20:47:38,319 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash 421394924, now seen corresponding path program 69 times [2021-08-06 20:47:38,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:38,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367834968] [2021-08-06 20:47:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:38,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:38,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:38,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367834968] [2021-08-06 20:47:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367834968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:38,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377251724] [2021-08-06 20:47:38,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:38,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:38,388 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:38,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:47:40,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:47:40,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:40,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:40,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:40,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:40,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:40,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377251724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:40,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:40,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:47:40,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955110201] [2021-08-06 20:47:40,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:47:40,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:47:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:47:40,528 INFO L87 Difference]: Start difference. First operand 8526 states and 19698 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:40,736 INFO L93 Difference]: Finished difference Result 8740 states and 20127 transitions. [2021-08-06 20:47:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:47:40,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:40,747 INFO L225 Difference]: With dead ends: 8740 [2021-08-06 20:47:40,747 INFO L226 Difference]: Without dead ends: 8740 [2021-08-06 20:47:40,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:47:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8740 states. [2021-08-06 20:47:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8740 to 8514. [2021-08-06 20:47:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 2.3101139433807116) internal successors, (19666), 8513 states have internal predecessors, (19666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 19666 transitions. [2021-08-06 20:47:40,844 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 19666 transitions. Word has length 28 [2021-08-06 20:47:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:40,845 INFO L470 AbstractCegarLoop]: Abstraction has 8514 states and 19666 transitions. [2021-08-06 20:47:40,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 19666 transitions. [2021-08-06 20:47:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:47:40,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:40,853 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:40,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:41,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:41,054 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 330778506, now seen corresponding path program 70 times [2021-08-06 20:47:41,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:41,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473266324] [2021-08-06 20:47:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:41,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:41,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:41,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:41,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:41,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:41,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:41,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473266324] [2021-08-06 20:47:41,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473266324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:41,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226746893] [2021-08-06 20:47:41,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:41,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:41,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:41,321 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:41,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:47:43,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:47:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:43,933 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:47:43,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:47:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226746893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:43,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:43,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:47:43,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147421959] [2021-08-06 20:47:43,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:47:43,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:47:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:47:43,989 INFO L87 Difference]: Start difference. First operand 8514 states and 19666 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:45,026 INFO L93 Difference]: Finished difference Result 10251 states and 23579 transitions. [2021-08-06 20:47:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:47:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:47:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:45,039 INFO L225 Difference]: With dead ends: 10251 [2021-08-06 20:47:45,039 INFO L226 Difference]: Without dead ends: 10241 [2021-08-06 20:47:45,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 931.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:47:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-08-06 20:47:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 8571. [2021-08-06 20:47:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 8570 states have (on average 2.3108518086347725) internal successors, (19804), 8570 states have internal predecessors, (19804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 19804 transitions. [2021-08-06 20:47:45,155 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 19804 transitions. Word has length 30 [2021-08-06 20:47:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:45,155 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 19804 transitions. [2021-08-06 20:47:45,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 19804 transitions. [2021-08-06 20:47:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:47:45,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:45,165 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:45,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 20:47:45,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:45,365 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash 584567630, now seen corresponding path program 71 times [2021-08-06 20:47:45,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:45,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106417532] [2021-08-06 20:47:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:45,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:45,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:45,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:45,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:45,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:45,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:45,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106417532] [2021-08-06 20:47:45,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106417532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:45,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268462676] [2021-08-06 20:47:45,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:45,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:45,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:45,662 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:45,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:47:47,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:47:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:47:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:48,278 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:47:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:47:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:48,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268462676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:48,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:48,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:47:48,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136211360] [2021-08-06 20:47:48,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:47:48,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:47:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:47:48,350 INFO L87 Difference]: Start difference. First operand 8571 states and 19804 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:49,457 INFO L93 Difference]: Finished difference Result 10253 states and 23593 transitions. [2021-08-06 20:47:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:47:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:47:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:49,471 INFO L225 Difference]: With dead ends: 10253 [2021-08-06 20:47:49,471 INFO L226 Difference]: Without dead ends: 10248 [2021-08-06 20:47:49,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 960.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:47:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2021-08-06 20:47:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 8575. [2021-08-06 20:47:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 2.310940051317938) internal successors, (19814), 8574 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 19814 transitions. [2021-08-06 20:47:49,587 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 19814 transitions. Word has length 30 [2021-08-06 20:47:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:49,587 INFO L470 AbstractCegarLoop]: Abstraction has 8575 states and 19814 transitions. [2021-08-06 20:47:49,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 19814 transitions. [2021-08-06 20:47:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:47:49,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:49,596 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:49,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 20:47:49,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 20:47:49,797 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1518969078, now seen corresponding path program 72 times [2021-08-06 20:47:49,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:49,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603711581] [2021-08-06 20:47:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:49,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:49,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 35.1 percent of original size [2021-08-06 20:47:49,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 35.1 percent of original size [2021-08-06 20:47:49,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:47:49,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:47:49,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 20:47:49,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 20:47:49,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:47:49,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:47:50,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 71.1 percent of original size [2021-08-06 20:47:50,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 71.1 percent of original size [2021-08-06 20:47:50,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:47:50,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:47:50,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:47:50,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:47:50,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:50,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:50,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:50,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603711581] [2021-08-06 20:47:50,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603711581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:50,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987127788] [2021-08-06 20:47:50,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:50,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:50,143 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:50,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:47:52,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:47:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:47:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:52,793 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:47:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:47:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:52,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987127788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:52,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:52,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:47:52,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182519287] [2021-08-06 20:47:52,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:47:52,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:47:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:47:52,850 INFO L87 Difference]: Start difference. First operand 8575 states and 19814 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:55,088 INFO L93 Difference]: Finished difference Result 8688 states and 19985 transitions. [2021-08-06 20:47:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:47:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:47:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:55,099 INFO L225 Difference]: With dead ends: 8688 [2021-08-06 20:47:55,099 INFO L226 Difference]: Without dead ends: 8683 [2021-08-06 20:47:55,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2009.6ms TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:47:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8683 states. [2021-08-06 20:47:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8683 to 8589. [2021-08-06 20:47:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8589 states, 8588 states have (on average 2.311597578015836) internal successors, (19852), 8588 states have internal predecessors, (19852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8589 states to 8589 states and 19852 transitions. [2021-08-06 20:47:55,194 INFO L78 Accepts]: Start accepts. Automaton has 8589 states and 19852 transitions. Word has length 30 [2021-08-06 20:47:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:55,194 INFO L470 AbstractCegarLoop]: Abstraction has 8589 states and 19852 transitions. [2021-08-06 20:47:55,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8589 states and 19852 transitions. [2021-08-06 20:47:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:47:55,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:55,204 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:55,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 20:47:55,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:55,405 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894602, now seen corresponding path program 73 times [2021-08-06 20:47:55,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:55,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849442099] [2021-08-06 20:47:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:55,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:55,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:55,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:47:55,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:55,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:47:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:55,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:55,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849442099] [2021-08-06 20:47:55,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849442099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:55,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488513413] [2021-08-06 20:47:55,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:55,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:55,649 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:55,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:47:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:47:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:58,444 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:47:58,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:47:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:58,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488513413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:58,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:58,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:47:58,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129998128] [2021-08-06 20:47:58,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:47:58,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:47:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:47:58,515 INFO L87 Difference]: Start difference. First operand 8589 states and 19852 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:59,770 INFO L93 Difference]: Finished difference Result 10320 states and 23712 transitions. [2021-08-06 20:47:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:47:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:47:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:59,782 INFO L225 Difference]: With dead ends: 10320 [2021-08-06 20:47:59,782 INFO L226 Difference]: Without dead ends: 10315 [2021-08-06 20:47:59,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:47:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-08-06 20:47:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 8595. [2021-08-06 20:47:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 2.3106818710728416) internal successors, (19858), 8594 states have internal predecessors, (19858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 19858 transitions. [2021-08-06 20:47:59,888 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 19858 transitions. Word has length 30 [2021-08-06 20:47:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:59,888 INFO L470 AbstractCegarLoop]: Abstraction has 8595 states and 19858 transitions. [2021-08-06 20:47:59,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 19858 transitions. [2021-08-06 20:47:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:47:59,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:59,896 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:59,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:00,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 20:48:00,097 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -253359538, now seen corresponding path program 74 times [2021-08-06 20:48:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:00,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272880079] [2021-08-06 20:48:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:00,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:00,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:48:00,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:48:00,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:00,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:00,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:00,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272880079] [2021-08-06 20:48:00,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272880079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:00,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921114209] [2021-08-06 20:48:00,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:48:00,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:00,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:00,397 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:00,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:48:02,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:48:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:03,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:48:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-08-06 20:48:03,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:48:03,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:48:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:03,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921114209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:03,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:03,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:48:03,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703103302] [2021-08-06 20:48:03,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:48:03,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:48:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:48:03,640 INFO L87 Difference]: Start difference. First operand 8595 states and 19858 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:11,194 INFO L93 Difference]: Finished difference Result 10339 states and 23752 transitions. [2021-08-06 20:48:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:48:11,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:48:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:11,207 INFO L225 Difference]: With dead ends: 10339 [2021-08-06 20:48:11,207 INFO L226 Difference]: Without dead ends: 10329 [2021-08-06 20:48:11,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 3512.7ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:48:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2021-08-06 20:48:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 8625. [2021-08-06 20:48:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8625 states, 8624 states have (on average 2.309601113172542) internal successors, (19918), 8624 states have internal predecessors, (19918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8625 states to 8625 states and 19918 transitions. [2021-08-06 20:48:11,322 INFO L78 Accepts]: Start accepts. Automaton has 8625 states and 19918 transitions. Word has length 30 [2021-08-06 20:48:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:11,322 INFO L470 AbstractCegarLoop]: Abstraction has 8625 states and 19918 transitions. [2021-08-06 20:48:11,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8625 states and 19918 transitions. [2021-08-06 20:48:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:11,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:11,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:11,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:11,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:48:11,532 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1854210510, now seen corresponding path program 75 times [2021-08-06 20:48:11,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:11,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999188675] [2021-08-06 20:48:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:11,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:11,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 35.1 percent of original size [2021-08-06 20:48:11,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 35.1 percent of original size [2021-08-06 20:48:11,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:48:11,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:48:11,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 20:48:11,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 20:48:11,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:48:11,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 71.6 percent of original size [2021-08-06 20:48:12,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:48:12,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 20:48:12,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.3 percent of original size [2021-08-06 20:48:12,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.3 percent of original size [2021-08-06 20:48:12,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:12,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:12,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:12,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:12,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:12,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999188675] [2021-08-06 20:48:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999188675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:12,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053998897] [2021-08-06 20:48:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:12,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:12,417 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:48:14,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:48:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:48:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:15,836 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:48:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-06 20:48:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053998897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:16,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:16,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:48:16,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936407301] [2021-08-06 20:48:16,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:48:16,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:48:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:48:16,231 INFO L87 Difference]: Start difference. First operand 8625 states and 19918 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:24,903 INFO L93 Difference]: Finished difference Result 9453 states and 21322 transitions. [2021-08-06 20:48:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:48:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:48:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:24,917 INFO L225 Difference]: With dead ends: 9453 [2021-08-06 20:48:24,917 INFO L226 Difference]: Without dead ends: 9443 [2021-08-06 20:48:24,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 7648.3ms TimeCoverageRelationStatistics Valid=445, Invalid=3215, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:48:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9443 states. [2021-08-06 20:48:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9443 to 8646. [2021-08-06 20:48:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8646 states, 8645 states have (on average 2.3090803932909196) internal successors, (19962), 8645 states have internal predecessors, (19962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 19962 transitions. [2021-08-06 20:48:25,039 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 19962 transitions. Word has length 30 [2021-08-06 20:48:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:25,039 INFO L470 AbstractCegarLoop]: Abstraction has 8646 states and 19962 transitions. [2021-08-06 20:48:25,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 19962 transitions. [2021-08-06 20:48:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:25,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:25,049 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:25,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 20:48:25,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 20:48:25,250 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2107999634, now seen corresponding path program 76 times [2021-08-06 20:48:25,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:25,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359887657] [2021-08-06 20:48:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:25,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:25,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:25,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:25,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:25,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:26,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:26,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359887657] [2021-08-06 20:48:26,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359887657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:26,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918321498] [2021-08-06 20:48:26,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:26,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:26,021 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:26,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:48:28,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:28,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:48:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:29,555 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:48:29,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:48:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918321498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:29,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:29,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:48:29,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081332788] [2021-08-06 20:48:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:48:29,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:48:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:48:29,699 INFO L87 Difference]: Start difference. First operand 8646 states and 19962 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:37,052 INFO L93 Difference]: Finished difference Result 11139 states and 25586 transitions. [2021-08-06 20:48:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:48:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:48:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:37,074 INFO L225 Difference]: With dead ends: 11139 [2021-08-06 20:48:37,074 INFO L226 Difference]: Without dead ends: 11134 [2021-08-06 20:48:37,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 6603.9ms TimeCoverageRelationStatistics Valid=480, Invalid=3552, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:48:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11134 states. [2021-08-06 20:48:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11134 to 8672. [2021-08-06 20:48:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 8671 states have (on average 2.3076923076923075) internal successors, (20010), 8671 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 20010 transitions. [2021-08-06 20:48:37,245 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 20010 transitions. Word has length 30 [2021-08-06 20:48:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:37,245 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 20010 transitions. [2021-08-06 20:48:37,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 20010 transitions. [2021-08-06 20:48:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:37,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:37,255 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:37,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 20:48:37,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:37,456 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1009936758, now seen corresponding path program 28 times [2021-08-06 20:48:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:37,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614849512] [2021-08-06 20:48:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:37,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:37,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:48:37,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 34.5 percent of original size [2021-08-06 20:48:37,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:48:37,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:48:37,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 62.3 percent of original size [2021-08-06 20:48:37,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 62.3 percent of original size [2021-08-06 20:48:37,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 65.7 percent of original size [2021-08-06 20:48:38,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 65.7 percent of original size [2021-08-06 20:48:38,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 54.8 percent of original size [2021-08-06 20:48:38,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 54.8 percent of original size [2021-08-06 20:48:38,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 55.5 percent of original size [2021-08-06 20:48:38,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 55.5 percent of original size [2021-08-06 20:48:38,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:48:38,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:48:38,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:38,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:38,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:38,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:38,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614849512] [2021-08-06 20:48:38,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614849512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:38,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994613185] [2021-08-06 20:48:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:38,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:38,732 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:38,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:48:40,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:48:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:42,215 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:48:42,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:48:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:42,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994613185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:42,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:42,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-06 20:48:42,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731276180] [2021-08-06 20:48:42,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:48:42,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:48:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:48:42,327 INFO L87 Difference]: Start difference. First operand 8672 states and 20010 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:48,493 INFO L93 Difference]: Finished difference Result 8721 states and 20073 transitions. [2021-08-06 20:48:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:48:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:48:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:48,505 INFO L225 Difference]: With dead ends: 8721 [2021-08-06 20:48:48,505 INFO L226 Difference]: Without dead ends: 8716 [2021-08-06 20:48:48,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 6006.0ms TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:48:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8716 states. [2021-08-06 20:48:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8716 to 8676. [2021-08-06 20:48:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.3072046109510085) internal successors, (20015), 8675 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20015 transitions. [2021-08-06 20:48:48,603 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20015 transitions. Word has length 30 [2021-08-06 20:48:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:48,603 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20015 transitions. [2021-08-06 20:48:48,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20015 transitions. [2021-08-06 20:48:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:48,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:48,611 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:48,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 20:48:48,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:48,812 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1805963638, now seen corresponding path program 29 times [2021-08-06 20:48:48,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:48,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389702405] [2021-08-06 20:48:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:48,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:48,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 33.3 percent of original size [2021-08-06 20:48:48,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 33.3 percent of original size [2021-08-06 20:48:48,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:48:48,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:48:49,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 61.2 percent of original size [2021-08-06 20:48:49,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 61.2 percent of original size [2021-08-06 20:48:49,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 64.7 percent of original size [2021-08-06 20:48:49,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 64.7 percent of original size [2021-08-06 20:48:49,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 53.8 percent of original size [2021-08-06 20:48:49,400 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 53.8 percent of original size [2021-08-06 20:48:49,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 62.5 percent of original size [2021-08-06 20:48:49,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 62.5 percent of original size [2021-08-06 20:48:49,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:48:49,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:48:49,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:49,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:48:49,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:49,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:48:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:49,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:49,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389702405] [2021-08-06 20:48:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389702405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:49,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662083371] [2021-08-06 20:48:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:49,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:49,887 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:49,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:48:52,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:48:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:48:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:53,448 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:48:53,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:48:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:53,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662083371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:53,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:53,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-06 20:48:53,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522401446] [2021-08-06 20:48:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:48:53,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:48:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:48:53,563 INFO L87 Difference]: Start difference. First operand 8676 states and 20015 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:01,769 INFO L93 Difference]: Finished difference Result 8761 states and 20133 transitions. [2021-08-06 20:49:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:49:01,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:01,781 INFO L225 Difference]: With dead ends: 8761 [2021-08-06 20:49:01,781 INFO L226 Difference]: Without dead ends: 8756 [2021-08-06 20:49:01,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 7450.3ms TimeCoverageRelationStatistics Valid=538, Invalid=3244, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:49:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8756 states. [2021-08-06 20:49:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8756 to 8676. [2021-08-06 20:49:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.3072046109510085) internal successors, (20015), 8675 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20015 transitions. [2021-08-06 20:49:01,881 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20015 transitions. Word has length 30 [2021-08-06 20:49:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:01,881 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20015 transitions. [2021-08-06 20:49:01,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20015 transitions. [2021-08-06 20:49:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:01,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:01,890 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:01,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:02,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 20:49:02,090 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash -613497206, now seen corresponding path program 30 times [2021-08-06 20:49:02,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:02,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084242706] [2021-08-06 20:49:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:02,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:02,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 33.3 percent of original size [2021-08-06 20:49:02,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 33.3 percent of original size [2021-08-06 20:49:02,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:49:02,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 59.1 percent of original size [2021-08-06 20:49:02,390 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 61.2 percent of original size [2021-08-06 20:49:02,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 61.2 percent of original size [2021-08-06 20:49:02,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 64.7 percent of original size [2021-08-06 20:49:02,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 64.7 percent of original size [2021-08-06 20:49:02,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 53.8 percent of original size [2021-08-06 20:49:02,692 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 53.8 percent of original size [2021-08-06 20:49:02,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 62.5 percent of original size [2021-08-06 20:49:02,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 62.5 percent of original size [2021-08-06 20:49:02,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 60.4 percent of original size [2021-08-06 20:49:02,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 60.4 percent of original size [2021-08-06 20:49:03,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:03,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:03,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:03,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:03,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:03,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084242706] [2021-08-06 20:49:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084242706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:03,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212552661] [2021-08-06 20:49:03,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:03,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:03,173 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:03,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:49:05,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:49:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:49:05,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:06,786 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:49:06,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:49:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:06,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212552661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:06,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:06,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:49:06,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984829714] [2021-08-06 20:49:06,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:06,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:06,938 INFO L87 Difference]: Start difference. First operand 8676 states and 20015 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:16,489 INFO L93 Difference]: Finished difference Result 8823 states and 20227 transitions. [2021-08-06 20:49:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:49:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:16,501 INFO L225 Difference]: With dead ends: 8823 [2021-08-06 20:49:16,501 INFO L226 Difference]: Without dead ends: 8818 [2021-08-06 20:49:16,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 8911.2ms TimeCoverageRelationStatistics Valid=630, Invalid=3792, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:49:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8818 states. [2021-08-06 20:49:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8818 to 8675. [2021-08-06 20:49:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 8674 states have (on average 2.3068941664745215) internal successors, (20010), 8674 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 20010 transitions. [2021-08-06 20:49:16,625 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 20010 transitions. Word has length 30 [2021-08-06 20:49:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:16,626 INFO L470 AbstractCegarLoop]: Abstraction has 8675 states and 20010 transitions. [2021-08-06 20:49:16,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 20010 transitions. [2021-08-06 20:49:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:16,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:16,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:16,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 20:49:16,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:16,835 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash -146874486, now seen corresponding path program 77 times [2021-08-06 20:49:16,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:16,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274191110] [2021-08-06 20:49:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:16,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:17,029 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:17,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:17,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:17,421 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:17,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:17,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274191110] [2021-08-06 20:49:17,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274191110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:17,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693456027] [2021-08-06 20:49:17,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:49:17,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:17,462 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:17,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:49:19,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:49:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:49:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:21,193 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:49:21,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:49:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693456027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:21,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:49:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323610771] [2021-08-06 20:49:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:21,299 INFO L87 Difference]: Start difference. First operand 8675 states and 20010 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:26,567 INFO L93 Difference]: Finished difference Result 10501 states and 24064 transitions. [2021-08-06 20:49:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:49:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:26,581 INFO L225 Difference]: With dead ends: 10501 [2021-08-06 20:49:26,582 INFO L226 Difference]: Without dead ends: 10491 [2021-08-06 20:49:26,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 4117.7ms TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:49:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2021-08-06 20:49:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8690. [2021-08-06 20:49:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8690 states, 8689 states have (on average 2.307285073080907) internal successors, (20048), 8689 states have internal predecessors, (20048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8690 states to 8690 states and 20048 transitions. [2021-08-06 20:49:26,708 INFO L78 Accepts]: Start accepts. Automaton has 8690 states and 20048 transitions. Word has length 30 [2021-08-06 20:49:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:26,708 INFO L470 AbstractCegarLoop]: Abstraction has 8690 states and 20048 transitions. [2021-08-06 20:49:26,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8690 states and 20048 transitions. [2021-08-06 20:49:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:26,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:26,717 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:26,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:26,917 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash 106914638, now seen corresponding path program 78 times [2021-08-06 20:49:26,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:26,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514955117] [2021-08-06 20:49:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:26,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:27,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:27,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:27,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:27,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:27,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:27,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514955117] [2021-08-06 20:49:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514955117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:27,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437719593] [2021-08-06 20:49:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:27,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:27,619 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:49:30,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:49:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:49:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:31,519 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:49:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:49:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:31,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437719593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:31,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:31,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:49:31,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821189165] [2021-08-06 20:49:31,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:49:31,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:49:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:49:31,646 INFO L87 Difference]: Start difference. First operand 8690 states and 20048 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:35,277 INFO L93 Difference]: Finished difference Result 10590 states and 24261 transitions. [2021-08-06 20:49:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:49:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:35,291 INFO L225 Difference]: With dead ends: 10590 [2021-08-06 20:49:35,291 INFO L226 Difference]: Without dead ends: 10585 [2021-08-06 20:49:35,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 3036.5ms TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:49:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2021-08-06 20:49:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 8739. [2021-08-06 20:49:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8739 states, 8738 states have (on average 2.3081940947585258) internal successors, (20169), 8738 states have internal predecessors, (20169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 20169 transitions. [2021-08-06 20:49:35,408 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 20169 transitions. Word has length 30 [2021-08-06 20:49:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:35,409 INFO L470 AbstractCegarLoop]: Abstraction has 8739 states and 20169 transitions. [2021-08-06 20:49:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 20169 transitions. [2021-08-06 20:49:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:35,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:35,418 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:35,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 20:49:35,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:35,619 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1383241610, now seen corresponding path program 79 times [2021-08-06 20:49:35,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:35,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60296357] [2021-08-06 20:49:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:35,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:35,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:35,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:49:36,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:36,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:36,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:36,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60296357] [2021-08-06 20:49:36,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60296357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:36,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941853904] [2021-08-06 20:49:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:36,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:36,270 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:36,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:49:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:49:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:40,092 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:49:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:49:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941853904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:40,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:40,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:49:40,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77860650] [2021-08-06 20:49:40,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:49:40,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:49:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:49:40,213 INFO L87 Difference]: Start difference. First operand 8739 states and 20169 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:44,437 INFO L93 Difference]: Finished difference Result 10667 states and 24377 transitions. [2021-08-06 20:49:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:49:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:44,451 INFO L225 Difference]: With dead ends: 10667 [2021-08-06 20:49:44,451 INFO L226 Difference]: Without dead ends: 10662 [2021-08-06 20:49:44,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 3311.4ms TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:49:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-08-06 20:49:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 8749. [2021-08-06 20:49:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8749 states, 8748 states have (on average 2.30761316872428) internal successors, (20187), 8748 states have internal predecessors, (20187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 20187 transitions. [2021-08-06 20:49:44,571 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 20187 transitions. Word has length 30 [2021-08-06 20:49:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:44,571 INFO L470 AbstractCegarLoop]: Abstraction has 8749 states and 20187 transitions. [2021-08-06 20:49:44,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 20187 transitions. [2021-08-06 20:49:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:44,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:44,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:44,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 20:49:44,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 20:49:44,782 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash -804155638, now seen corresponding path program 80 times [2021-08-06 20:49:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123640725] [2021-08-06 20:49:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:44,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:44,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 66, result has 46.8 percent of original size [2021-08-06 20:49:44,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 66, result has 46.8 percent of original size [2021-08-06 20:49:45,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.5 percent of original size [2021-08-06 20:49:45,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.5 percent of original size [2021-08-06 20:49:45,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.0 percent of original size [2021-08-06 20:49:45,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.0 percent of original size [2021-08-06 20:49:45,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:49:45,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:49:45,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:49:45,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:49:45,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 68.4 percent of original size [2021-08-06 20:49:45,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 68.4 percent of original size [2021-08-06 20:49:45,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:45,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:45,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:45,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:45,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:45,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123640725] [2021-08-06 20:49:45,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123640725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:45,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132829387] [2021-08-06 20:49:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:49:45,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:45,685 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:45,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:49:48,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:49:48,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:49:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:49,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:49:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:49:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:49:49,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:49:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:49:49,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:49:49,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 20:49:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132829387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:49,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:49:49,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97033479] [2021-08-06 20:49:49,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:49,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:49,653 INFO L87 Difference]: Start difference. First operand 8749 states and 20187 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:55,944 INFO L93 Difference]: Finished difference Result 9610 states and 21661 transitions. [2021-08-06 20:49:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:49:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:55,958 INFO L225 Difference]: With dead ends: 9610 [2021-08-06 20:49:55,958 INFO L226 Difference]: Without dead ends: 9600 [2021-08-06 20:49:55,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5751.5ms TimeCoverageRelationStatistics Valid=397, Invalid=2465, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:49:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2021-08-06 20:49:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 8751. [2021-08-06 20:49:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8750 states have (on average 2.3077714285714284) internal successors, (20193), 8750 states have internal predecessors, (20193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 20193 transitions. [2021-08-06 20:49:56,100 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 20193 transitions. Word has length 30 [2021-08-06 20:49:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:56,100 INFO L470 AbstractCegarLoop]: Abstraction has 8751 states and 20193 transitions. [2021-08-06 20:49:56,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 20193 transitions. [2021-08-06 20:49:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:56,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:56,111 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:56,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:56,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 20:49:56,312 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1999316746, now seen corresponding path program 81 times [2021-08-06 20:49:56,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:56,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664351282] [2021-08-06 20:49:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:56,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:56,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:56,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:49:56,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:56,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:49:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:56,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:56,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664351282] [2021-08-06 20:49:56,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664351282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:56,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474623594] [2021-08-06 20:49:56,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:49:56,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:56,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:56,980 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:49:59,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:49:59,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:49:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:00,677 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:50:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-06 20:50:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474623594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:01,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:01,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:50:01,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754182712] [2021-08-06 20:50:01,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:01,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:01,141 INFO L87 Difference]: Start difference. First operand 8751 states and 20193 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:06,173 INFO L93 Difference]: Finished difference Result 12336 states and 28186 transitions. [2021-08-06 20:50:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:50:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:06,193 INFO L225 Difference]: With dead ends: 12336 [2021-08-06 20:50:06,194 INFO L226 Difference]: Without dead ends: 12326 [2021-08-06 20:50:06,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 3971.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:50:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-08-06 20:50:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 8759. [2021-08-06 20:50:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 8758 states have (on average 2.3078328385476135) internal successors, (20212), 8758 states have internal predecessors, (20212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 20212 transitions. [2021-08-06 20:50:06,352 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 20212 transitions. Word has length 30 [2021-08-06 20:50:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:06,353 INFO L470 AbstractCegarLoop]: Abstraction has 8759 states and 20212 transitions. [2021-08-06 20:50:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 20212 transitions. [2021-08-06 20:50:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:06,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:06,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:06,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:50:06,571 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1860571018, now seen corresponding path program 82 times [2021-08-06 20:50:06,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:06,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781013182] [2021-08-06 20:50:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:06,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:06,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:06,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:07,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:07,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781013182] [2021-08-06 20:50:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781013182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528198497] [2021-08-06 20:50:07,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:50:07,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:07,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:07,321 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:07,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:50:10,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:50:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:50:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:11,711 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:50:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:50:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528198497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:11,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:11,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:50:11,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463730525] [2021-08-06 20:50:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:50:11,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:50:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:50:11,851 INFO L87 Difference]: Start difference. First operand 8759 states and 20212 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:17,837 INFO L93 Difference]: Finished difference Result 13296 states and 30045 transitions. [2021-08-06 20:50:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:50:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:17,856 INFO L225 Difference]: With dead ends: 13296 [2021-08-06 20:50:17,857 INFO L226 Difference]: Without dead ends: 13286 [2021-08-06 20:50:17,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 4612.6ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:50:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13286 states. [2021-08-06 20:50:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13286 to 8769. [2021-08-06 20:50:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8768 states have (on average 2.3079379562043796) internal successors, (20236), 8768 states have internal predecessors, (20236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 20236 transitions. [2021-08-06 20:50:18,002 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 20236 transitions. Word has length 30 [2021-08-06 20:50:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:18,002 INFO L470 AbstractCegarLoop]: Abstraction has 8769 states and 20236 transitions. [2021-08-06 20:50:18,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 20236 transitions. [2021-08-06 20:50:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:18,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:18,013 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:18,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:18,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 20:50:18,218 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1779681162, now seen corresponding path program 83 times [2021-08-06 20:50:18,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:18,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366708228] [2021-08-06 20:50:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:18,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:18,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:18,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:18,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:50:18,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:50:18,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:18,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:18,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:18,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366708228] [2021-08-06 20:50:18,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366708228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:18,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264735463] [2021-08-06 20:50:18,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:50:18,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:18,956 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:18,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:50:21,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:50:21,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:50:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:23,265 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:50:23,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 51 [2021-08-06 20:50:23,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:50:23,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:50:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264735463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:23,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:23,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:50:23,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913293451] [2021-08-06 20:50:23,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:23,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:23,724 INFO L87 Difference]: Start difference. First operand 8769 states and 20236 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:34,724 INFO L93 Difference]: Finished difference Result 14259 states and 32138 transitions. [2021-08-06 20:50:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:50:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:34,747 INFO L225 Difference]: With dead ends: 14259 [2021-08-06 20:50:34,748 INFO L226 Difference]: Without dead ends: 14249 [2021-08-06 20:50:34,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 9204.4ms TimeCoverageRelationStatistics Valid=1043, Invalid=5119, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:50:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2021-08-06 20:50:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 8773. [2021-08-06 20:50:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8773 states, 8772 states have (on average 2.308025535795714) internal successors, (20246), 8772 states have internal predecessors, (20246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8773 states to 8773 states and 20246 transitions. [2021-08-06 20:50:34,907 INFO L78 Accepts]: Start accepts. Automaton has 8773 states and 20246 transitions. Word has length 30 [2021-08-06 20:50:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:34,907 INFO L470 AbstractCegarLoop]: Abstraction has 8773 states and 20246 transitions. [2021-08-06 20:50:34,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 8773 states and 20246 transitions. [2021-08-06 20:50:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:34,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:34,918 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:34,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 20:50:35,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:35,118 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:35,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -334572978, now seen corresponding path program 84 times [2021-08-06 20:50:35,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:35,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679188231] [2021-08-06 20:50:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:35,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:35,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:35,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:50:35,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:50:35,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:50:35,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:35,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:50:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:35,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:35,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679188231] [2021-08-06 20:50:35,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679188231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:35,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117545867] [2021-08-06 20:50:35,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:50:35,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:35,892 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:50:38,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:50:38,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:38,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:50:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:40,257 INFO L354 Elim1Store]: treesize reduction 8, result has 86.0 percent of original size [2021-08-06 20:50:40,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 69 [2021-08-06 20:50:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:41,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117545867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:41,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:41,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-06 20:50:41,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339037625] [2021-08-06 20:50:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:50:41,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:50:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:50:41,900 INFO L87 Difference]: Start difference. First operand 8773 states and 20246 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:54,064 INFO L93 Difference]: Finished difference Result 14163 states and 32092 transitions. [2021-08-06 20:50:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 20:50:54,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:54,086 INFO L225 Difference]: With dead ends: 14163 [2021-08-06 20:50:54,086 INFO L226 Difference]: Without dead ends: 14153 [2021-08-06 20:50:54,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 9745.2ms TimeCoverageRelationStatistics Valid=1043, Invalid=5763, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 20:50:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-08-06 20:50:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 8782. [2021-08-06 20:50:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 8781 states have (on average 2.308507003758114) internal successors, (20271), 8781 states have internal predecessors, (20271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 20271 transitions. [2021-08-06 20:50:54,245 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 20271 transitions. Word has length 30 [2021-08-06 20:50:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:54,245 INFO L470 AbstractCegarLoop]: Abstraction has 8782 states and 20271 transitions. [2021-08-06 20:50:54,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 20271 transitions. [2021-08-06 20:50:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:54,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:54,256 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:54,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 20:50:54,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:54,457 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash 957501322, now seen corresponding path program 85 times [2021-08-06 20:50:54,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:54,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427821689] [2021-08-06 20:50:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:54,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:54,681 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:50:54,687 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:50:55,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:50:55,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:50:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:55,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:55,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427821689] [2021-08-06 20:50:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427821689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:55,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492515509] [2021-08-06 20:50:55,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:50:55,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:55,303 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:55,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:50:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:58,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:50:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:59,551 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:50:59,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:50:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:59,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492515509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:59,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:59,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:50:59,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048050496] [2021-08-06 20:50:59,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:50:59,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:59,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:50:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:50:59,683 INFO L87 Difference]: Start difference. First operand 8782 states and 20271 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:05,311 INFO L93 Difference]: Finished difference Result 11665 states and 26559 transitions. [2021-08-06 20:51:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:51:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:05,328 INFO L225 Difference]: With dead ends: 11665 [2021-08-06 20:51:05,329 INFO L226 Difference]: Without dead ends: 11660 [2021-08-06 20:51:05,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3995.5ms TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:51:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-08-06 20:51:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 8793. [2021-08-06 20:51:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 2.3085759781619655) internal successors, (20297), 8792 states have internal predecessors, (20297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 20297 transitions. [2021-08-06 20:51:05,466 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 20297 transitions. Word has length 30 [2021-08-06 20:51:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 8793 states and 20297 transitions. [2021-08-06 20:51:05,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 20297 transitions. [2021-08-06 20:51:05,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:05,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:05,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:05,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 20:51:05,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 20:51:05,677 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1573576458, now seen corresponding path program 86 times [2021-08-06 20:51:05,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:05,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027155099] [2021-08-06 20:51:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:05,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:06,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:51:06,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:51:06,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:51:06,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:51:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:06,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:06,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027155099] [2021-08-06 20:51:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027155099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:06,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910369275] [2021-08-06 20:51:06,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:51:06,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:06,375 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:51:09,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:51:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:51:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:10,511 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:51:10,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:51:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910369275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:10,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:51:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992445608] [2021-08-06 20:51:10,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:10,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:10,656 INFO L87 Difference]: Start difference. First operand 8793 states and 20297 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:21,815 INFO L93 Difference]: Finished difference Result 13483 states and 30624 transitions. [2021-08-06 20:51:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 20:51:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:21,836 INFO L225 Difference]: With dead ends: 13483 [2021-08-06 20:51:21,837 INFO L226 Difference]: Without dead ends: 13468 [2021-08-06 20:51:21,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 9594.1ms TimeCoverageRelationStatistics Valid=744, Invalid=5108, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 20:51:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13468 states. [2021-08-06 20:51:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13468 to 8812. [2021-08-06 20:51:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8812 states, 8811 states have (on average 2.309612983770287) internal successors, (20350), 8811 states have internal predecessors, (20350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8812 states to 8812 states and 20350 transitions. [2021-08-06 20:51:21,984 INFO L78 Accepts]: Start accepts. Automaton has 8812 states and 20350 transitions. Word has length 30 [2021-08-06 20:51:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:21,985 INFO L470 AbstractCegarLoop]: Abstraction has 8812 states and 20350 transitions. [2021-08-06 20:51:21,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 8812 states and 20350 transitions. [2021-08-06 20:51:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:21,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:21,995 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:22,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 20:51:22,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:22,219 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2144999542, now seen corresponding path program 87 times [2021-08-06 20:51:22,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:22,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93138820] [2021-08-06 20:51:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:22,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:22,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:51:22,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:51:22,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:51:22,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:51:22,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:51:22,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:51:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:22,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:22,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93138820] [2021-08-06 20:51:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93138820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:22,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654676635] [2021-08-06 20:51:22,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:51:22,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:22,902 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:22,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:51:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:51:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:51:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:27,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:51:27,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-08-06 20:51:28,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 62.6 percent of original size [2021-08-06 20:51:28,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 62.6 percent of original size [2021-08-06 20:51:29,088 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 27.0 percent of original size [2021-08-06 20:51:29,089 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 27.0 percent of original size [2021-08-06 20:51:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654676635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:29,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:51:29,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331793692] [2021-08-06 20:51:29,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:29,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:29,188 INFO L87 Difference]: Start difference. First operand 8812 states and 20350 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:42,822 INFO L93 Difference]: Finished difference Result 14650 states and 32973 transitions. [2021-08-06 20:51:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:51:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:42,844 INFO L225 Difference]: With dead ends: 14650 [2021-08-06 20:51:42,844 INFO L226 Difference]: Without dead ends: 14645 [2021-08-06 20:51:42,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 11954.6ms TimeCoverageRelationStatistics Valid=951, Invalid=4305, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 20:51:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14645 states. [2021-08-06 20:51:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14645 to 8810. [2021-08-06 20:51:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8810 states, 8809 states have (on average 2.309456237938472) internal successors, (20344), 8809 states have internal predecessors, (20344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8810 states to 8810 states and 20344 transitions. [2021-08-06 20:51:43,000 INFO L78 Accepts]: Start accepts. Automaton has 8810 states and 20344 transitions. Word has length 30 [2021-08-06 20:51:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:43,000 INFO L470 AbstractCegarLoop]: Abstraction has 8810 states and 20344 transitions. [2021-08-06 20:51:43,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8810 states and 20344 transitions. [2021-08-06 20:51:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:43,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:43,011 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:43,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 20:51:43,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:43,211 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:43,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1492686602, now seen corresponding path program 88 times [2021-08-06 20:51:43,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:43,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783968477] [2021-08-06 20:51:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:43,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:43,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:51:43,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:51:43,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:51:43,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:51:43,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:51:43,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:51:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:44,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:44,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783968477] [2021-08-06 20:51:44,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783968477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:44,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531664106] [2021-08-06 20:51:44,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:51:44,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:44,015 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:44,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 20:51:46,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:51:46,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:51:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:48,358 INFO L354 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-08-06 20:51:48,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 72 [2021-08-06 20:51:49,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:51:49,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:51:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:49,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531664106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:49,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:49,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:51:49,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538475356] [2021-08-06 20:51:49,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:49,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:49,275 INFO L87 Difference]: Start difference. First operand 8810 states and 20344 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:03,309 INFO L93 Difference]: Finished difference Result 14199 states and 32534 transitions. [2021-08-06 20:52:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 20:52:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:03,334 INFO L225 Difference]: With dead ends: 14199 [2021-08-06 20:52:03,334 INFO L226 Difference]: Without dead ends: 14184 [2021-08-06 20:52:03,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 12106.0ms TimeCoverageRelationStatistics Valid=908, Invalid=5098, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:52:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14184 states. [2021-08-06 20:52:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14184 to 8814. [2021-08-06 20:52:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8814 states, 8813 states have (on average 2.30954272098037) internal successors, (20354), 8813 states have internal predecessors, (20354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 20354 transitions. [2021-08-06 20:52:03,508 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 20354 transitions. Word has length 30 [2021-08-06 20:52:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:03,508 INFO L470 AbstractCegarLoop]: Abstraction has 8814 states and 20354 transitions. [2021-08-06 20:52:03,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 20354 transitions. [2021-08-06 20:52:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:03,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:03,519 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:03,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 20:52:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:03,719 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 678803790, now seen corresponding path program 89 times [2021-08-06 20:52:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:03,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38092408] [2021-08-06 20:52:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:03,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:03,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:52:03,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:52:04,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:04,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:04,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38092408] [2021-08-06 20:52:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38092408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:04,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771135891] [2021-08-06 20:52:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:52:04,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:04,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:04,467 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:04,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 20:52:07,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:52:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:52:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:08,737 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:52:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:52:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771135891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:08,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:52:08,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672089472] [2021-08-06 20:52:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:52:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:52:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:52:08,860 INFO L87 Difference]: Start difference. First operand 8814 states and 20354 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:13,570 INFO L93 Difference]: Finished difference Result 11342 states and 25738 transitions. [2021-08-06 20:52:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:52:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:13,601 INFO L225 Difference]: With dead ends: 11342 [2021-08-06 20:52:13,601 INFO L226 Difference]: Without dead ends: 11337 [2021-08-06 20:52:13,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 3710.8ms TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:52:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-08-06 20:52:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 8845. [2021-08-06 20:52:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8845 states, 8844 states have (on average 2.3102668475802806) internal successors, (20432), 8844 states have internal predecessors, (20432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 20432 transitions. [2021-08-06 20:52:13,706 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 20432 transitions. Word has length 30 [2021-08-06 20:52:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:13,707 INFO L470 AbstractCegarLoop]: Abstraction has 8845 states and 20432 transitions. [2021-08-06 20:52:13,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 20432 transitions. [2021-08-06 20:52:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:13,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:13,715 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:13,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:13,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:13,916 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1294878926, now seen corresponding path program 90 times [2021-08-06 20:52:13,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:13,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273379246] [2021-08-06 20:52:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:13,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:14,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:14,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:14,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:14,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:14,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273379246] [2021-08-06 20:52:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273379246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612689629] [2021-08-06 20:52:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:52:14,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:14,629 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:14,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 20:52:17,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:52:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:52:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:18,825 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:52:18,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:52:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612689629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:18,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:52:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331457652] [2021-08-06 20:52:18,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:18,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:18,961 INFO L87 Difference]: Start difference. First operand 8845 states and 20432 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:29,455 INFO L93 Difference]: Finished difference Result 13497 states and 30710 transitions. [2021-08-06 20:52:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 20:52:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:29,472 INFO L225 Difference]: With dead ends: 13497 [2021-08-06 20:52:29,473 INFO L226 Difference]: Without dead ends: 13482 [2021-08-06 20:52:29,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 9141.7ms TimeCoverageRelationStatistics Valid=688, Invalid=5164, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 20:52:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13482 states. [2021-08-06 20:52:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13482 to 8866. [2021-08-06 20:52:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 8865 states have (on average 2.310547095318669) internal successors, (20483), 8865 states have internal predecessors, (20483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 20483 transitions. [2021-08-06 20:52:29,605 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 20483 transitions. Word has length 30 [2021-08-06 20:52:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 8866 states and 20483 transitions. [2021-08-06 20:52:29,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 20483 transitions. [2021-08-06 20:52:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:29,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:29,614 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:29,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 20:52:29,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 20:52:29,815 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1871270222, now seen corresponding path program 91 times [2021-08-06 20:52:29,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:29,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924217361] [2021-08-06 20:52:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:29,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:30,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:52:30,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:52:30,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:52:30,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:52:30,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:52:30,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:52:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:30,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:30,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924217361] [2021-08-06 20:52:30,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924217361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:30,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599006439] [2021-08-06 20:52:30,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:52:30,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:30,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:30,444 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:30,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 20:52:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:52:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:34,660 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:52:34,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 53 [2021-08-06 20:52:34,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:52:34,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:52:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:35,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599006439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:35,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:35,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:52:35,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961079388] [2021-08-06 20:52:35,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:52:35,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:35,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:52:35,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:52:35,032 INFO L87 Difference]: Start difference. First operand 8866 states and 20483 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:40,789 INFO L93 Difference]: Finished difference Result 15098 states and 34031 transitions. [2021-08-06 20:52:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:52:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:40,810 INFO L225 Difference]: With dead ends: 15098 [2021-08-06 20:52:40,811 INFO L226 Difference]: Without dead ends: 15088 [2021-08-06 20:52:40,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 4486.5ms TimeCoverageRelationStatistics Valid=703, Invalid=2603, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:52:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15088 states. [2021-08-06 20:52:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15088 to 8877. [2021-08-06 20:52:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8877 states, 8876 states have (on average 2.311063542136097) internal successors, (20513), 8876 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 20513 transitions. [2021-08-06 20:52:40,965 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 20513 transitions. Word has length 30 [2021-08-06 20:52:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:40,965 INFO L470 AbstractCegarLoop]: Abstraction has 8877 states and 20513 transitions. [2021-08-06 20:52:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 20513 transitions. [2021-08-06 20:52:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:40,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:40,975 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:41,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 20:52:41,176 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1213989070, now seen corresponding path program 92 times [2021-08-06 20:52:41,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:41,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544510195] [2021-08-06 20:52:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:41,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:41,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:52:41,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:52:41,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:41,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:41,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:41,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:41,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:41,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544510195] [2021-08-06 20:52:41,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544510195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:41,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022946105] [2021-08-06 20:52:41,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:52:41,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:41,842 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:41,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 20:52:44,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:52:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:52:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:45,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:52:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:45,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:52:45,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-08-06 20:52:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:46,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022946105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:46,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:46,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:52:46,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502090176] [2021-08-06 20:52:46,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:52:46,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:52:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:52:46,162 INFO L87 Difference]: Start difference. First operand 8877 states and 20513 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:56,162 INFO L93 Difference]: Finished difference Result 13684 states and 31307 transitions. [2021-08-06 20:52:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 20:52:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:56,179 INFO L225 Difference]: With dead ends: 13684 [2021-08-06 20:52:56,180 INFO L226 Difference]: Without dead ends: 13674 [2021-08-06 20:52:56,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 8435.9ms TimeCoverageRelationStatistics Valid=669, Invalid=4733, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:52:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13674 states. [2021-08-06 20:52:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13674 to 8877. [2021-08-06 20:52:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8877 states, 8876 states have (on average 2.311063542136097) internal successors, (20513), 8876 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 20513 transitions. [2021-08-06 20:52:56,311 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 20513 transitions. Word has length 30 [2021-08-06 20:52:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 8877 states and 20513 transitions. [2021-08-06 20:52:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 20513 transitions. [2021-08-06 20:52:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:56,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:56,320 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:56,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 20:52:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:56,521 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash -900265070, now seen corresponding path program 93 times [2021-08-06 20:52:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307168176] [2021-08-06 20:52:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:56,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:57,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:52:57,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 20:52:57,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:57,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:52:57,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:57,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:52:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:57,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:57,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307168176] [2021-08-06 20:52:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307168176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:57,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398562584] [2021-08-06 20:52:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:52:57,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:57,195 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:53:00,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:53:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:00,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:01,346 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-08-06 20:53:01,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 69 [2021-08-06 20:53:02,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 69.0 percent of original size [2021-08-06 20:53:02,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 69.0 percent of original size [2021-08-06 20:53:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398562584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:02,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:02,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:53:02,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83720497] [2021-08-06 20:53:02,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:02,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:02,412 INFO L87 Difference]: Start difference. First operand 8877 states and 20513 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:10,141 INFO L93 Difference]: Finished difference Result 13421 states and 31067 transitions. [2021-08-06 20:53:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:53:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:10,156 INFO L225 Difference]: With dead ends: 13421 [2021-08-06 20:53:10,156 INFO L226 Difference]: Without dead ends: 13416 [2021-08-06 20:53:10,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 6471.6ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:53:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13416 states. [2021-08-06 20:53:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13416 to 8882. [2021-08-06 20:53:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8881 states have (on average 2.311113613331832) internal successors, (20525), 8881 states have internal predecessors, (20525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 20525 transitions. [2021-08-06 20:53:10,281 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 20525 transitions. Word has length 30 [2021-08-06 20:53:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:10,282 INFO L470 AbstractCegarLoop]: Abstraction has 8882 states and 20525 transitions. [2021-08-06 20:53:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 20525 transitions. [2021-08-06 20:53:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:10,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:10,290 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:10,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 20:53:10,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 20:53:10,491 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1116657546, now seen corresponding path program 94 times [2021-08-06 20:53:10,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:10,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632028938] [2021-08-06 20:53:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:10,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:10,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:53:10,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:53:11,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:11,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:11,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:11,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632028938] [2021-08-06 20:53:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632028938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:11,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555652382] [2021-08-06 20:53:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:53:11,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:11,214 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:11,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:53:14,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:53:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:53:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:15,616 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:53:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:53:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555652382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:15,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:15,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:53:15,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457816053] [2021-08-06 20:53:15,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:53:15,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:53:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:53:15,737 INFO L87 Difference]: Start difference. First operand 8882 states and 20525 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:20,046 INFO L93 Difference]: Finished difference Result 11364 states and 25836 transitions. [2021-08-06 20:53:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:53:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:20,061 INFO L225 Difference]: With dead ends: 11364 [2021-08-06 20:53:20,061 INFO L226 Difference]: Without dead ends: 11359 [2021-08-06 20:53:20,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3525.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:53:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11359 states. [2021-08-06 20:53:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11359 to 8912. [2021-08-06 20:53:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8912 states, 8911 states have (on average 2.3113006396588487) internal successors, (20596), 8911 states have internal predecessors, (20596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 20596 transitions. [2021-08-06 20:53:20,196 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 20596 transitions. Word has length 30 [2021-08-06 20:53:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:20,196 INFO L470 AbstractCegarLoop]: Abstraction has 8912 states and 20596 transitions. [2021-08-06 20:53:20,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 20596 transitions. [2021-08-06 20:53:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:20,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:20,205 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:20,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:20,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 20:53:20,406 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1732732682, now seen corresponding path program 95 times [2021-08-06 20:53:20,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:20,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867170214] [2021-08-06 20:53:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:20,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:20,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:20,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:21,037 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:21,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:21,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:21,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867170214] [2021-08-06 20:53:21,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867170214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:21,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918122194] [2021-08-06 20:53:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:53:21,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:21,099 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:21,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:53:24,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:53:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:53:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:25,700 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:53:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 35 [2021-08-06 20:53:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:25,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918122194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:53:25,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203597303] [2021-08-06 20:53:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:25,839 INFO L87 Difference]: Start difference. First operand 8912 states and 20596 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:33,926 INFO L93 Difference]: Finished difference Result 12383 states and 28417 transitions. [2021-08-06 20:53:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:53:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:33,942 INFO L225 Difference]: With dead ends: 12383 [2021-08-06 20:53:33,942 INFO L226 Difference]: Without dead ends: 12378 [2021-08-06 20:53:33,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 6764.9ms TimeCoverageRelationStatistics Valid=409, Invalid=3373, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:53:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2021-08-06 20:53:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 8920. [2021-08-06 20:53:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8919 states have (on average 2.3110214149568336) internal successors, (20612), 8919 states have internal predecessors, (20612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 20612 transitions. [2021-08-06 20:53:34,068 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 20612 transitions. Word has length 30 [2021-08-06 20:53:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:34,068 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 20612 transitions. [2021-08-06 20:53:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 20612 transitions. [2021-08-06 20:53:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:34,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:34,078 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:34,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 20:53:34,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 20:53:34,281 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -816950578, now seen corresponding path program 96 times [2021-08-06 20:53:34,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:34,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315012074] [2021-08-06 20:53:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:34,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:34,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:34,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:34,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:34,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:34,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:34,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315012074] [2021-08-06 20:53:34,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315012074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:34,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237538522] [2021-08-06 20:53:34,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:53:34,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:34,991 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:34,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:53:38,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:53:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:53:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:39,506 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:53:39,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:53:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:39,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237538522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:39,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:39,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:53:39,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262706751] [2021-08-06 20:53:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:39,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:39,638 INFO L87 Difference]: Start difference. First operand 8920 states and 20612 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:47,942 INFO L93 Difference]: Finished difference Result 12377 states and 28411 transitions. [2021-08-06 20:53:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:53:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:47,972 INFO L225 Difference]: With dead ends: 12377 [2021-08-06 20:53:47,973 INFO L226 Difference]: Without dead ends: 12372 [2021-08-06 20:53:47,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 7122.7ms TimeCoverageRelationStatistics Valid=559, Invalid=3863, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:53:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12372 states. [2021-08-06 20:53:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12372 to 8920. [2021-08-06 20:53:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8919 states have (on average 2.3110214149568336) internal successors, (20612), 8919 states have internal predecessors, (20612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 20612 transitions. [2021-08-06 20:53:48,090 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 20612 transitions. Word has length 30 [2021-08-06 20:53:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:48,090 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 20612 transitions. [2021-08-06 20:53:48,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 20612 transitions. [2021-08-06 20:53:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:48,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:48,099 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:48,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 20:53:48,299 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 33636106, now seen corresponding path program 97 times [2021-08-06 20:53:48,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:48,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041551419] [2021-08-06 20:53:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:48,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:48,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:48,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:53:49,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:49,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:53:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:49,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:49,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041551419] [2021-08-06 20:53:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041551419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:49,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173587683] [2021-08-06 20:53:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:53:49,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:49,059 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:49,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:53:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:53,469 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:53:53,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:53:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:53,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173587683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:53,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:53:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884695230] [2021-08-06 20:53:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:53,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:53,596 INFO L87 Difference]: Start difference. First operand 8920 states and 20612 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:02,833 INFO L93 Difference]: Finished difference Result 12675 states and 29175 transitions. [2021-08-06 20:54:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:54:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:02,850 INFO L225 Difference]: With dead ends: 12675 [2021-08-06 20:54:02,850 INFO L226 Difference]: Without dead ends: 12670 [2021-08-06 20:54:02,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 7750.7ms TimeCoverageRelationStatistics Valid=667, Invalid=4445, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:54:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12670 states. [2021-08-06 20:54:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12670 to 8922. [2021-08-06 20:54:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8922 states, 8921 states have (on average 2.311175877143818) internal successors, (20618), 8921 states have internal predecessors, (20618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8922 states to 8922 states and 20618 transitions. [2021-08-06 20:54:02,975 INFO L78 Accepts]: Start accepts. Automaton has 8922 states and 20618 transitions. Word has length 30 [2021-08-06 20:54:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:02,975 INFO L470 AbstractCegarLoop]: Abstraction has 8922 states and 20618 transitions. [2021-08-06 20:54:02,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8922 states and 20618 transitions. [2021-08-06 20:54:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:02,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:02,984 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:03,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:03,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:03,194 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 649711242, now seen corresponding path program 31 times [2021-08-06 20:54:03,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:03,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100808480] [2021-08-06 20:54:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:03,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:03,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:54:03,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:54:03,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:54:03,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:54:03,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:54:03,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:54:03,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 80.3 percent of original size [2021-08-06 20:54:03,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 80.3 percent of original size [2021-08-06 20:54:03,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 78.8 percent of original size [2021-08-06 20:54:03,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 78.8 percent of original size [2021-08-06 20:54:04,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:04,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:04,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:54:04,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:54:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:04,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:04,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100808480] [2021-08-06 20:54:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100808480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:04,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622001419] [2021-08-06 20:54:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:54:04,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:04,137 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:04,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:54:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:54:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:08,411 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:54:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:54:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622001419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:08,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 20:54:08,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157886872] [2021-08-06 20:54:08,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:08,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:08,548 INFO L87 Difference]: Start difference. First operand 8922 states and 20618 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:15,755 INFO L93 Difference]: Finished difference Result 13056 states and 29643 transitions. [2021-08-06 20:54:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:54:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:15,772 INFO L225 Difference]: With dead ends: 13056 [2021-08-06 20:54:15,772 INFO L226 Difference]: Without dead ends: 13041 [2021-08-06 20:54:15,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 6446.3ms TimeCoverageRelationStatistics Valid=618, Invalid=3672, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:54:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13041 states. [2021-08-06 20:54:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13041 to 8925. [2021-08-06 20:54:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 2.3110712684894668) internal successors, (20624), 8924 states have internal predecessors, (20624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 20624 transitions. [2021-08-06 20:54:15,903 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 20624 transitions. Word has length 30 [2021-08-06 20:54:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:15,903 INFO L470 AbstractCegarLoop]: Abstraction has 8925 states and 20624 transitions. [2021-08-06 20:54:15,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 20624 transitions. [2021-08-06 20:54:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:15,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:15,911 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:15,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:16,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:16,113 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 568821386, now seen corresponding path program 32 times [2021-08-06 20:54:16,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:16,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533589209] [2021-08-06 20:54:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:16,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:16,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:54:16,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.8 percent of original size [2021-08-06 20:54:16,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:54:16,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:54:16,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:54:16,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:54:16,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 80.3 percent of original size [2021-08-06 20:54:16,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 80.3 percent of original size [2021-08-06 20:54:16,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 78.8 percent of original size [2021-08-06 20:54:16,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 78.8 percent of original size [2021-08-06 20:54:16,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:54:16,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 66.7 percent of original size [2021-08-06 20:54:16,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:16,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:16,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:54:16,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:54:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:17,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:17,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533589209] [2021-08-06 20:54:17,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533589209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:17,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116352923] [2021-08-06 20:54:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:54:17,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:17,040 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:17,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:54:20,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:54:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:54:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:21,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:54:21,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-08-06 20:54:21,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:21,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:54:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:21,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116352923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:21,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:21,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-08-06 20:54:21,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979401379] [2021-08-06 20:54:21,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:54:21,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:54:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:54:21,830 INFO L87 Difference]: Start difference. First operand 8925 states and 20624 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:31,842 INFO L93 Difference]: Finished difference Result 13234 states and 30191 transitions. [2021-08-06 20:54:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:54:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:31,859 INFO L225 Difference]: With dead ends: 13234 [2021-08-06 20:54:31,859 INFO L226 Difference]: Without dead ends: 13229 [2021-08-06 20:54:31,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 8629.8ms TimeCoverageRelationStatistics Valid=827, Invalid=4003, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:54:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-08-06 20:54:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 8924. [2021-08-06 20:54:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8923 states have (on average 2.310881990361986) internal successors, (20620), 8923 states have internal predecessors, (20620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 20620 transitions. [2021-08-06 20:54:31,994 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 20620 transitions. Word has length 30 [2021-08-06 20:54:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:31,994 INFO L470 AbstractCegarLoop]: Abstraction has 8924 states and 20620 transitions. [2021-08-06 20:54:31,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 20620 transitions. [2021-08-06 20:54:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:32,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:32,003 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:32,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:32,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-06 20:54:32,204 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash 809482314, now seen corresponding path program 98 times [2021-08-06 20:54:32,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:32,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971447719] [2021-08-06 20:54:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:32,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:32,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:54:32,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:54:32,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:54:32,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:54:32,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:32,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:32,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971447719] [2021-08-06 20:54:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971447719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064133109] [2021-08-06 20:54:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:54:32,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:32,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:32,932 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:32,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:54:36,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:54:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:54:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:37,708 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:54:37,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:54:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:37,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064133109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:37,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:37,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:54:37,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123131035] [2021-08-06 20:54:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:37,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:37,812 INFO L87 Difference]: Start difference. First operand 8924 states and 20620 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:40,742 INFO L93 Difference]: Finished difference Result 11471 states and 26329 transitions. [2021-08-06 20:54:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:54:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:40,757 INFO L225 Difference]: With dead ends: 11471 [2021-08-06 20:54:40,757 INFO L226 Difference]: Without dead ends: 11439 [2021-08-06 20:54:40,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2717.8ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:54:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11439 states. [2021-08-06 20:54:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11439 to 8944. [2021-08-06 20:54:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.311081292631108) internal successors, (20668), 8943 states have internal predecessors, (20668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20668 transitions. [2021-08-06 20:54:40,873 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20668 transitions. Word has length 30 [2021-08-06 20:54:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:40,873 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 20668 transitions. [2021-08-06 20:54:40,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20668 transitions. [2021-08-06 20:54:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:40,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:40,881 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:40,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:41,082 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1063271438, now seen corresponding path program 99 times [2021-08-06 20:54:41,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:41,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053706856] [2021-08-06 20:54:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:41,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:41,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:54:41,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:54:41,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:54:41,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:54:41,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:41,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:41,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:41,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053706856] [2021-08-06 20:54:41,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053706856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:41,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133515841] [2021-08-06 20:54:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:54:41,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:41,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:41,818 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:41,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 20:54:45,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:54:45,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:54:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:46,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:54:46,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-08-06 20:54:46,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 60.0 percent of original size [2021-08-06 20:54:46,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 60.0 percent of original size [2021-08-06 20:54:46,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:54:46,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:54:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:47,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133515841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:47,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:47,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:54:47,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034695315] [2021-08-06 20:54:47,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:54:47,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:54:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:54:47,076 INFO L87 Difference]: Start difference. First operand 8944 states and 20668 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:52,490 INFO L93 Difference]: Finished difference Result 11454 states and 26298 transitions. [2021-08-06 20:54:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:54:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:52,504 INFO L225 Difference]: With dead ends: 11454 [2021-08-06 20:54:52,504 INFO L226 Difference]: Without dead ends: 11418 [2021-08-06 20:54:52,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 4707.5ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:54:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11418 states. [2021-08-06 20:54:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11418 to 8954. [2021-08-06 20:54:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8954 states, 8953 states have (on average 2.3109572210432257) internal successors, (20690), 8953 states have internal predecessors, (20690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8954 states to 8954 states and 20690 transitions. [2021-08-06 20:54:52,610 INFO L78 Accepts]: Start accepts. Automaton has 8954 states and 20690 transitions. Word has length 30 [2021-08-06 20:54:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:52,610 INFO L470 AbstractCegarLoop]: Abstraction has 8954 states and 20690 transitions. [2021-08-06 20:54:52,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8954 states and 20690 transitions. [2021-08-06 20:54:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:52,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:52,618 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:52,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:52,819 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1040265270, now seen corresponding path program 100 times [2021-08-06 20:54:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:52,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117532272] [2021-08-06 20:54:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:52,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:52,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 43.1 percent of original size [2021-08-06 20:54:52,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 43.1 percent of original size [2021-08-06 20:54:53,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 87.0 percent of original size [2021-08-06 20:54:53,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 87.0 percent of original size [2021-08-06 20:54:53,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.1 percent of original size [2021-08-06 20:54:53,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.1 percent of original size [2021-08-06 20:54:53,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:54:53,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:54:53,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:54:53,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 79.6 percent of original size [2021-08-06 20:54:53,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:54:53,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:54:53,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:53,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:54:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:53,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:53,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117532272] [2021-08-06 20:54:53,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117532272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:53,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286366574] [2021-08-06 20:54:53,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:54:53,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:53,709 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:53,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 20:54:57,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:54:57,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:54:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:58,203 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:54:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:54:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286366574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:58,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 20:54:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212884901] [2021-08-06 20:54:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:54:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:54:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:54:58,308 INFO L87 Difference]: Start difference. First operand 8954 states and 20690 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:04,477 INFO L93 Difference]: Finished difference Result 9062 states and 20851 transitions. [2021-08-06 20:55:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:55:04,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:04,489 INFO L225 Difference]: With dead ends: 9062 [2021-08-06 20:55:04,489 INFO L226 Difference]: Without dead ends: 9047 [2021-08-06 20:55:04,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 5535.6ms TimeCoverageRelationStatistics Valid=352, Invalid=2510, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:55:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-08-06 20:55:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 8968. [2021-08-06 20:55:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8968 states, 8967 states have (on average 2.3115869298539087) internal successors, (20728), 8967 states have internal predecessors, (20728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8968 states to 8968 states and 20728 transitions. [2021-08-06 20:55:04,595 INFO L78 Accepts]: Start accepts. Automaton has 8968 states and 20728 transitions. Word has length 30 [2021-08-06 20:55:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:04,596 INFO L470 AbstractCegarLoop]: Abstraction has 8968 states and 20728 transitions. [2021-08-06 20:55:04,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8968 states and 20728 transitions. [2021-08-06 20:55:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:04,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:04,604 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:04,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 20:55:04,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 20:55:04,805 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 152201162, now seen corresponding path program 101 times [2021-08-06 20:55:04,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:04,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949819423] [2021-08-06 20:55:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:04,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:04,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 43.1 percent of original size [2021-08-06 20:55:04,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 43.1 percent of original size [2021-08-06 20:55:05,088 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 87.0 percent of original size [2021-08-06 20:55:05,091 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 87.0 percent of original size [2021-08-06 20:55:05,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.1 percent of original size [2021-08-06 20:55:05,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.1 percent of original size [2021-08-06 20:55:05,456 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:55:05,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 79.2 percent of original size [2021-08-06 20:55:05,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 68.4 percent of original size [2021-08-06 20:55:05,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 68.4 percent of original size [2021-08-06 20:55:05,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:55:05,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:55:05,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:55:05,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:55:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:05,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:05,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949819423] [2021-08-06 20:55:05,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949819423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:05,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568170301] [2021-08-06 20:55:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:55:05,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:05,802 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 20:55:09,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:55:09,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:55:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:10,458 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:55:10,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-06 20:55:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:10,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568170301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:10,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:10,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 20:55:10,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38637600] [2021-08-06 20:55:10,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:55:10,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:10,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:55:10,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:55:10,568 INFO L87 Difference]: Start difference. First operand 8968 states and 20728 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:17,571 INFO L93 Difference]: Finished difference Result 9835 states and 22208 transitions. [2021-08-06 20:55:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:55:17,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:17,583 INFO L225 Difference]: With dead ends: 9835 [2021-08-06 20:55:17,584 INFO L226 Difference]: Without dead ends: 9824 [2021-08-06 20:55:17,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 6412.5ms TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:55:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9824 states. [2021-08-06 20:55:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9824 to 8984. [2021-08-06 20:55:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 2.3109206278526107) internal successors, (20759), 8983 states have internal predecessors, (20759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 20759 transitions. [2021-08-06 20:55:17,703 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 20759 transitions. Word has length 30 [2021-08-06 20:55:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:17,703 INFO L470 AbstractCegarLoop]: Abstraction has 8984 states and 20759 transitions. [2021-08-06 20:55:17,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 20759 transitions. [2021-08-06 20:55:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:17,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:17,711 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:17,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 20:55:17,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 20:55:17,912 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1339293750, now seen corresponding path program 102 times [2021-08-06 20:55:17,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:17,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196049191] [2021-08-06 20:55:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:17,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:18,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:55:18,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:55:18,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:55:18,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:55:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:18,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:18,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196049191] [2021-08-06 20:55:18,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196049191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:18,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424035603] [2021-08-06 20:55:18,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:55:18,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:18,682 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:18,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 20:55:22,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:55:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:55:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:23,361 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:55:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-06 20:55:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:24,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424035603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:24,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:24,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:55:24,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000916311] [2021-08-06 20:55:24,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:55:24,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:55:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:55:24,158 INFO L87 Difference]: Start difference. First operand 8984 states and 20759 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:27,395 INFO L93 Difference]: Finished difference Result 11447 states and 26328 transitions. [2021-08-06 20:55:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:55:27,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:27,411 INFO L225 Difference]: With dead ends: 11447 [2021-08-06 20:55:27,411 INFO L226 Difference]: Without dead ends: 11431 [2021-08-06 20:55:27,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2891.0ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:55:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2021-08-06 20:55:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 8986. [2021-08-06 20:55:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 2.3106288258208125) internal successors, (20761), 8985 states have internal predecessors, (20761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 20761 transitions. [2021-08-06 20:55:27,536 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 20761 transitions. Word has length 30 [2021-08-06 20:55:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:27,536 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 20761 transitions. [2021-08-06 20:55:27,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 20761 transitions. [2021-08-06 20:55:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:27,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:27,545 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:27,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 20:55:27,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 20:55:27,746 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1478039478, now seen corresponding path program 103 times [2021-08-06 20:55:27,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:27,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235071878] [2021-08-06 20:55:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:27,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:27,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:27,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:28,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:28,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:28,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:28,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:28,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:28,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235071878] [2021-08-06 20:55:28,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235071878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:28,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460244946] [2021-08-06 20:55:28,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:55:28,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:28,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:28,452 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:28,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 20:55:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:55:31,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:33,310 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:55:33,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:55:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:33,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460244946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:33,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:33,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:55:33,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101285439] [2021-08-06 20:55:33,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:33,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:33,450 INFO L87 Difference]: Start difference. First operand 8986 states and 20761 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:37,610 INFO L93 Difference]: Finished difference Result 12574 states and 28741 transitions. [2021-08-06 20:55:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:55:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:37,627 INFO L225 Difference]: With dead ends: 12574 [2021-08-06 20:55:37,627 INFO L226 Difference]: Without dead ends: 12561 [2021-08-06 20:55:37,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3170.3ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:55:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12561 states. [2021-08-06 20:55:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12561 to 8984. [2021-08-06 20:55:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 2.3106979850829346) internal successors, (20757), 8983 states have internal predecessors, (20757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 20757 transitions. [2021-08-06 20:55:37,754 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 20757 transitions. Word has length 30 [2021-08-06 20:55:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:37,754 INFO L470 AbstractCegarLoop]: Abstraction has 8984 states and 20757 transitions. [2021-08-06 20:55:37,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 20757 transitions. [2021-08-06 20:55:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:37,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:37,763 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:37,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 20:55:37,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:37,963 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1558929334, now seen corresponding path program 104 times [2021-08-06 20:55:37,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:37,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355032811] [2021-08-06 20:55:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:37,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:38,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:38,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:38,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:38,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:38,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:55:38,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:55:38,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:38,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:38,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:38,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355032811] [2021-08-06 20:55:38,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355032811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:38,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660144131] [2021-08-06 20:55:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:55:38,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:38,684 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:38,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 20:55:42,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:55:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:42,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:55:42,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:43,556 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:55:43,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 53 [2021-08-06 20:55:43,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:55:43,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:55:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:43,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660144131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:43,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:43,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:55:43,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841229977] [2021-08-06 20:55:43,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:43,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:43,927 INFO L87 Difference]: Start difference. First operand 8984 states and 20757 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:49,256 INFO L93 Difference]: Finished difference Result 13541 states and 30842 transitions. [2021-08-06 20:55:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:55:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:49,274 INFO L225 Difference]: With dead ends: 13541 [2021-08-06 20:55:49,274 INFO L226 Difference]: Without dead ends: 13532 [2021-08-06 20:55:49,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 4476.1ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:55:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-08-06 20:55:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 8986. [2021-08-06 20:55:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 2.3106288258208125) internal successors, (20761), 8985 states have internal predecessors, (20761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 20761 transitions. [2021-08-06 20:55:49,413 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 20761 transitions. Word has length 30 [2021-08-06 20:55:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:49,413 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 20761 transitions. [2021-08-06 20:55:49,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 20761 transitions. [2021-08-06 20:55:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:49,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:49,422 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:49,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 20:55:49,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 20:55:49,622 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash 621783822, now seen corresponding path program 105 times [2021-08-06 20:55:49,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:49,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338188623] [2021-08-06 20:55:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:49,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:49,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:49,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:55:49,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:49,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:55:50,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:55:50,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:55:50,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:50,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:55:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:50,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:50,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338188623] [2021-08-06 20:55:50,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338188623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:50,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679425338] [2021-08-06 20:55:50,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:55:50,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:50,288 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:50,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 20:55:53,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:55:53,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:55:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:54,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:55:54,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-08-06 20:55:55,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 69.8 percent of original size [2021-08-06 20:55:55,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 69.8 percent of original size [2021-08-06 20:55:56,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 66.7 percent of original size [2021-08-06 20:55:56,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 66.7 percent of original size [2021-08-06 20:55:56,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:55:56,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 24.4 percent of original size [2021-08-06 20:55:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:56,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679425338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:56,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:56,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:55:56,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673802430] [2021-08-06 20:55:56,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:55:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:55:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:55:56,818 INFO L87 Difference]: Start difference. First operand 8986 states and 20761 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:56:07,526 INFO L93 Difference]: Finished difference Result 13549 states and 30846 transitions. [2021-08-06 20:56:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:56:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:56:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:56:07,544 INFO L225 Difference]: With dead ends: 13549 [2021-08-06 20:56:07,544 INFO L226 Difference]: Without dead ends: 13527 [2021-08-06 20:56:07,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 9405.6ms TimeCoverageRelationStatistics Valid=773, Invalid=4197, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:56:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-08-06 20:56:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8990. [2021-08-06 20:56:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 2.31049059962176) internal successors, (20769), 8989 states have internal predecessors, (20769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 20769 transitions. [2021-08-06 20:56:07,688 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 20769 transitions. Word has length 30 [2021-08-06 20:56:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:56:07,688 INFO L470 AbstractCegarLoop]: Abstraction has 8990 states and 20769 transitions. [2021-08-06 20:56:07,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 20769 transitions. [2021-08-06 20:56:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:56:07,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:56:07,697 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:56:07,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 20:56:07,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 20:56:07,897 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:56:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:56:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1913858122, now seen corresponding path program 106 times [2021-08-06 20:56:07,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:56:07,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849665236] [2021-08-06 20:56:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:56:07,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:56:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:08,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:56:08,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:56:08,268 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:08,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:08,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:56:08,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:56:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:08,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:56:08,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849665236] [2021-08-06 20:56:08,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849665236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:08,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8404723] [2021-08-06 20:56:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:56:08,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:56:08,652 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:56:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 20:56:12,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:56:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:56:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:56:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:56:13,457 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:56:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 25 [2021-08-06 20:56:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:13,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8404723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:13,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:56:13,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:56:13,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205089331] [2021-08-06 20:56:13,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:56:13,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:56:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:56:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:56:13,579 INFO L87 Difference]: Start difference. First operand 8990 states and 20769 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:56:16,681 INFO L93 Difference]: Finished difference Result 12579 states and 28763 transitions. [2021-08-06 20:56:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:56:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:56:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:56:16,698 INFO L225 Difference]: With dead ends: 12579 [2021-08-06 20:56:16,698 INFO L226 Difference]: Without dead ends: 12564 [2021-08-06 20:56:16,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2513.1ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:56:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-08-06 20:56:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 8994. [2021-08-06 20:56:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8994 states, 8993 states have (on average 2.31046369398421) internal successors, (20778), 8993 states have internal predecessors, (20778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8994 states to 8994 states and 20778 transitions. [2021-08-06 20:56:16,821 INFO L78 Accepts]: Start accepts. Automaton has 8994 states and 20778 transitions. Word has length 30 [2021-08-06 20:56:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:56:16,821 INFO L470 AbstractCegarLoop]: Abstraction has 8994 states and 20778 transitions. [2021-08-06 20:56:16,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 8994 states and 20778 transitions. [2021-08-06 20:56:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:56:16,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:56:16,830 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:56:16,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 20:56:17,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:17,030 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:56:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:56:17,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1765034038, now seen corresponding path program 107 times [2021-08-06 20:56:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:56:17,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540314633] [2021-08-06 20:56:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:56:17,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:56:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:17,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:56:17,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:56:17,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:56:17,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:56:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:17,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:56:17,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540314633] [2021-08-06 20:56:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540314633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:17,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762124786] [2021-08-06 20:56:17,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:56:17,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:17,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:56:17,728 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:56:17,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 20:56:21,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:56:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:56:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:56:21,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:56:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:22,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:56:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-08-06 20:56:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762124786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:22,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:56:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:56:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079493743] [2021-08-06 20:56:22,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:56:22,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:56:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:56:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:56:22,726 INFO L87 Difference]: Start difference. First operand 8994 states and 20778 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:56:32,583 INFO L93 Difference]: Finished difference Result 12633 states and 28856 transitions. [2021-08-06 20:56:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 20:56:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:56:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:56:32,600 INFO L225 Difference]: With dead ends: 12633 [2021-08-06 20:56:32,601 INFO L226 Difference]: Without dead ends: 12617 [2021-08-06 20:56:32,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 8238.9ms TimeCoverageRelationStatistics Valid=838, Invalid=6818, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 20:56:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-08-06 20:56:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 8992. [2021-08-06 20:56:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8992 states, 8991 states have (on average 2.3105327549771992) internal successors, (20774), 8991 states have internal predecessors, (20774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8992 states to 8992 states and 20774 transitions. [2021-08-06 20:56:32,714 INFO L78 Accepts]: Start accepts. Automaton has 8992 states and 20774 transitions. Word has length 30 [2021-08-06 20:56:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:56:32,714 INFO L470 AbstractCegarLoop]: Abstraction has 8992 states and 20774 transitions. [2021-08-06 20:56:32,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 8992 states and 20774 transitions. [2021-08-06 20:56:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:56:32,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:56:32,723 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:56:32,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 20:56:32,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:32,923 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:56:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:56:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash -240297718, now seen corresponding path program 108 times [2021-08-06 20:56:32,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:56:32,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608019611] [2021-08-06 20:56:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:56:32,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:56:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:33,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:33,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:33,289 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:33,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:33,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:33,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:33,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:33,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:33,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:33,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:33,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:56:33,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608019611] [2021-08-06 20:56:33,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608019611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:33,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511792339] [2021-08-06 20:56:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:56:33,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:33,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:56:33,722 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:56:33,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 20:56:37,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:56:37,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:56:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:56:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:56:38,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:56:38,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-08-06 20:56:38,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 49.6 percent of original size [2021-08-06 20:56:38,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 49.6 percent of original size [2021-08-06 20:56:39,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 27.0 percent of original size [2021-08-06 20:56:39,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 27.0 percent of original size [2021-08-06 20:56:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:39,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511792339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:39,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:56:39,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:56:39,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631430305] [2021-08-06 20:56:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:56:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:56:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:56:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:56:39,219 INFO L87 Difference]: Start difference. First operand 8992 states and 20774 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:56:43,583 INFO L93 Difference]: Finished difference Result 11474 states and 26377 transitions. [2021-08-06 20:56:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:56:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:56:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:56:43,598 INFO L225 Difference]: With dead ends: 11474 [2021-08-06 20:56:43,598 INFO L226 Difference]: Without dead ends: 11464 [2021-08-06 20:56:43,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 3518.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:56:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11464 states. [2021-08-06 20:56:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11464 to 8996. [2021-08-06 20:56:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 2.310617009449694) internal successors, (20784), 8995 states have internal predecessors, (20784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 20784 transitions. [2021-08-06 20:56:43,717 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 20784 transitions. Word has length 30 [2021-08-06 20:56:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:56:43,717 INFO L470 AbstractCegarLoop]: Abstraction has 8996 states and 20784 transitions. [2021-08-06 20:56:43,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 20784 transitions. [2021-08-06 20:56:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:56:43,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:56:43,725 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:56:43,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 20:56:43,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:43,926 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:56:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:56:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1812682486, now seen corresponding path program 109 times [2021-08-06 20:56:43,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:56:43,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172059916] [2021-08-06 20:56:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:56:43,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:56:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:44,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:44,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:44,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:44,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:44,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:44,370 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:44,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:44,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:44,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:56:44,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:56:44,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:44,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:44,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:56:44,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172059916] [2021-08-06 20:56:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172059916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:44,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363667796] [2021-08-06 20:56:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:56:44,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:56:44,717 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:56:44,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 20:56:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:48,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:56:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:56:49,457 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:56:49,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 53 [2021-08-06 20:56:49,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:56:49,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 52.0 percent of original size [2021-08-06 20:56:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:49,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363667796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:49,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:56:49,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:56:49,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043882202] [2021-08-06 20:56:49,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:56:49,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:56:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:56:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:56:49,809 INFO L87 Difference]: Start difference. First operand 8996 states and 20784 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:56:52,990 INFO L93 Difference]: Finished difference Result 12494 states and 28645 transitions. [2021-08-06 20:56:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:56:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:56:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:56:53,006 INFO L225 Difference]: With dead ends: 12494 [2021-08-06 20:56:53,007 INFO L226 Difference]: Without dead ends: 12485 [2021-08-06 20:56:53,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2526.9ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:56:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-08-06 20:56:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 8996. [2021-08-06 20:56:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 2.310617009449694) internal successors, (20784), 8995 states have internal predecessors, (20784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 20784 transitions. [2021-08-06 20:56:53,141 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 20784 transitions. Word has length 30 [2021-08-06 20:56:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:56:53,142 INFO L470 AbstractCegarLoop]: Abstraction has 8996 states and 20784 transitions. [2021-08-06 20:56:53,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:56:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 20784 transitions. [2021-08-06 20:56:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:56:53,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:56:53,153 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:56:53,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 20:56:53,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:53,369 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:56:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:56:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 707858130, now seen corresponding path program 110 times [2021-08-06 20:56:53,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:56:53,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136988250] [2021-08-06 20:56:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:56:53,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:56:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:56:53,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:53,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:56:53,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:53,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:56:53,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:53,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:56:53,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:53,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 65.6 percent of original size [2021-08-06 20:56:54,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:56:54,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:56:54,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:54,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:56:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:54,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:56:54,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136988250] [2021-08-06 20:56:54,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136988250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:54,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211920065] [2021-08-06 20:56:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:56:54,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:56:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:56:54,237 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:56:54,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 20:56:57,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:56:57,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:56:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:56:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:56:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:56:58,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:56:58,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-08-06 20:56:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:56:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211920065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:56:59,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:56:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:56:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869979509] [2021-08-06 20:56:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:56:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:56:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:56:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:56:59,139 INFO L87 Difference]: Start difference. First operand 8996 states and 20784 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:57:02,629 INFO L93 Difference]: Finished difference Result 11481 states and 26403 transitions. [2021-08-06 20:57:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:57:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:57:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:57:02,645 INFO L225 Difference]: With dead ends: 11481 [2021-08-06 20:57:02,645 INFO L226 Difference]: Without dead ends: 11476 [2021-08-06 20:57:02,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2948.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:57:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2021-08-06 20:57:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 9001. [2021-08-06 20:57:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 2.310888888888889) internal successors, (20798), 9000 states have internal predecessors, (20798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 20798 transitions. [2021-08-06 20:57:02,771 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 20798 transitions. Word has length 30 [2021-08-06 20:57:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:57:02,771 INFO L470 AbstractCegarLoop]: Abstraction has 9001 states and 20798 transitions. [2021-08-06 20:57:02,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 20798 transitions. [2021-08-06 20:57:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:57:02,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:57:02,781 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:57:02,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 20:57:02,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 20:57:02,997 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:57:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:57:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash -409510770, now seen corresponding path program 111 times [2021-08-06 20:57:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:57:02,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220488024] [2021-08-06 20:57:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:57:02,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:57:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:57:03,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:57:03,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:57:03,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:57:03,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.0 percent of original size [2021-08-06 20:57:03,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:57:03,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:57:03,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:57:03,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 20:57:03,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:57:03,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 20:57:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:57:03,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:57:03,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220488024] [2021-08-06 20:57:03,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220488024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:57:03,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516450954] [2021-08-06 20:57:03,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:57:03,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:57:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:57:03,712 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:57:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 20:57:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:57:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:57:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:57:07,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:57:08,732 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:57:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 58 [2021-08-06 20:57:08,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 51.6 percent of original size [2021-08-06 20:57:08,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 51.6 percent of original size [2021-08-06 20:57:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:57:09,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516450954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:57:09,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:57:09,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-08-06 20:57:09,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421461959] [2021-08-06 20:57:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:57:09,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:57:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:57:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:57:09,243 INFO L87 Difference]: Start difference. First operand 9001 states and 20798 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:57:12,136 INFO L93 Difference]: Finished difference Result 11542 states and 26502 transitions. [2021-08-06 20:57:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:57:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:57:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:57:12,151 INFO L225 Difference]: With dead ends: 11542 [2021-08-06 20:57:12,151 INFO L226 Difference]: Without dead ends: 11532 [2021-08-06 20:57:12,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2862.9ms TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:57:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2021-08-06 20:57:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 9003. [2021-08-06 20:57:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 2.3108198178182624) internal successors, (20802), 9002 states have internal predecessors, (20802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 20802 transitions. [2021-08-06 20:57:12,275 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 20802 transitions. Word has length 30 [2021-08-06 20:57:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:57:12,275 INFO L470 AbstractCegarLoop]: Abstraction has 9003 states and 20802 transitions. [2021-08-06 20:57:12,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:57:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 20802 transitions. [2021-08-06 20:57:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:57:12,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:57:12,283 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:57:12,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 20:57:12,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 20:57:12,484 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:57:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:57:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 223628302, now seen corresponding path program 112 times [2021-08-06 20:57:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:57:12,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747191635] [2021-08-06 20:57:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:57:12,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:57:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:57:12,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:57:12,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.0 percent of original size [2021-08-06 20:57:12,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:57:12,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:57:13,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:57:13,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:57:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:57:13,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:57:13,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747191635] [2021-08-06 20:57:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747191635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:57:13,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781785046] [2021-08-06 20:57:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:57:13,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:57:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:57:13,228 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:57:13,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 20:57:15,415 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:57:15,415 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:57:16,435 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:57:16,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 20:57:16,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 20:57:16,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 20:57:16,636 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while executing Executor. [2021-08-06 20:57:16,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:57:16,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:57:16,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:57:16,639 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:57:16,639 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:57:16,640 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:57:16 BasicIcfg [2021-08-06 20:57:16,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:57:16,641 INFO L168 Benchmark]: Toolchain (without parser) took 799437.54 ms. Allocated memory was 182.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 162.2 MB in the beginning and 616.5 MB in the end (delta: -454.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory is still 163.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 182.5 MB. Free memory was 162.2 MB in the beginning and 160.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L168 Benchmark]: Boogie Preprocessor took 11.14 ms. Allocated memory is still 182.5 MB. Free memory was 160.7 MB in the beginning and 159.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L168 Benchmark]: RCFGBuilder took 244.72 ms. Allocated memory is still 182.5 MB. Free memory was 159.7 MB in the beginning and 146.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L168 Benchmark]: TraceAbstraction took 799159.73 ms. Allocated memory was 182.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 146.0 MB in the beginning and 616.5 MB in the end (delta: -470.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 20:57:16,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory is still 163.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 182.5 MB. Free memory was 162.2 MB in the beginning and 160.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.14 ms. Allocated memory is still 182.5 MB. Free memory was 160.7 MB in the beginning and 159.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 244.72 ms. Allocated memory is still 182.5 MB. Free memory was 159.7 MB in the beginning and 146.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 799159.73 ms. Allocated memory was 182.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 146.0 MB in the beginning and 616.5 MB in the end (delta: -470.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 12, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 799073.6ms, OverallIterations: 147, TraceHistogramMax: 3, EmptinessCheckTime: 663.8ms, AutomataDifference: 356016.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 97.9ms, PartialOrderReductionTime: 88.4ms, HoareTripleCheckerStatistics: 3905 SDtfs, 23871 SDslu, 30598 SDs, 0 SdLazy, 77385 SolverSat, 5130 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 100073.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8713 GetRequests, 2971 SyntacticMatches, 217 SemanticMatches, 5525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78036 ImplicationChecksByTransitivity, 298618.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9848occurred in iteration=96, InterpolantAutomatonStates: 4422, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8732.4ms AutomataMinimizationTime, 146 MinimizatonAttempts, 187760 StatesRemovedByMinimization, 146 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 441.6ms SsaConstructionTime, 1871.4ms SatisfiabilityAnalysisTime, 148414.2ms InterpolantComputationTime, 8006 NumberOfCodeBlocks, 8006 NumberOfCodeBlocksAsserted, 486 NumberOfCheckSat, 7717 ConstructedInterpolants, 232 QuantifiedInterpolants, 103731 SizeOfPredicates, 692 NumberOfNonLiveVariables, 10078 ConjunctsInSsa, 2904 ConjunctsInUnsatCore, 289 InterpolantComputations, 3 PerfectInterpolantSequences, 389/2874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown