/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-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:20:34,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:20:34,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:20:34,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:20:34,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:20:34,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:20:34,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:20:34,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:20:34,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:20:34,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:20:34,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:20:34,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:20:34,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:20:34,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:20:34,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:20:34,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:20:34,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:20:34,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:20:34,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:20:34,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:20:34,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:20:34,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:20:34,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:20:34,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:20:34,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 20:20:34,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 20:20:34,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 20:20:34,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 20:20:34,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 20:20:34,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 20:20:34,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:20:34,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:20:34,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:20:34,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:20:34,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:20:34,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:20:34,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:20:34,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:20:34,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:20:34,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:20:34,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:20:34,339 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 20:20:34,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:20:34,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:20:34,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:20:34,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:20:34,368 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:20:34,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:20:34,368 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:20:34,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:20:34,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:20:34,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:20:34,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:20:34,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:20:34,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:20:34,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:20:34,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:20:34,372 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:20:34,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:20:34,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:20:34,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:20:34,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:20:34,695 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:20:34,696 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:20:34,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-08-06 20:20:34,697 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-08-06 20:20:34,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:20:34,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:20:34,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:20:34,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:20:34,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:20:34,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:20:34,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:20:34,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:20:34,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:20:34,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:20:34,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:20:34,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:20:34,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:20:34,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/1) ... [2021-08-06 20:20:34,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:20:34,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:34,802 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 20:20:34,804 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 20:20:34,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:20:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:20:34,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:20:34,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:20:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:20:34,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:20:34,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:20:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:20:34,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:20:34,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:20:34,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:20:34,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:20:34,835 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 20:20:35,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:20:35,052 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:20:35,053 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:20:35 BoogieIcfgContainer [2021-08-06 20:20:35,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:20:35,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:20:35,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:20:35,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:20:35,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:34" (1/2) ... [2021-08-06 20:20:35,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff8e7e6 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:20:35, skipping insertion in model container [2021-08-06 20:20:35,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:20:35" (2/2) ... [2021-08-06 20:20:35,058 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-08-06 20:20:35,061 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:20:35,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:20:35,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:20:35,062 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:20:35,141 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:20:35,190 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:20:35,210 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 20:20:35,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:20:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 20:20:35,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:35,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:35,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2038969464, now seen corresponding path program 1 times [2021-08-06 20:20:35,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:35,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429886659] [2021-08-06 20:20:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:35,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:35,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 20:20:35,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 20:20:35,638 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 20:20:35,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:35,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429886659] [2021-08-06 20:20:35,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429886659] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:35,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:35,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:20:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033069776] [2021-08-06 20:20:35,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:35,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:35,661 INFO L87 Difference]: Start difference. First operand has 110 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:35,695 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2021-08-06 20:20:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 20:20:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:35,704 INFO L225 Difference]: With dead ends: 215 [2021-08-06 20:20:35,704 INFO L226 Difference]: Without dead ends: 62 [2021-08-06 20:20:35,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-06 20:20:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2021-08-06 20:20:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 72 transitions. [2021-08-06 20:20:35,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 72 transitions. Word has length 16 [2021-08-06 20:20:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:35,731 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 72 transitions. [2021-08-06 20:20:35,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 72 transitions. [2021-08-06 20:20:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:20:35,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:35,732 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 20:20:35,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:20:35,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash 588620202, now seen corresponding path program 1 times [2021-08-06 20:20:35,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:35,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221248642] [2021-08-06 20:20:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:35,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:35,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:35,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221248642] [2021-08-06 20:20:35,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221248642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:35,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638235384] [2021-08-06 20:20:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:35,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:35,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:35,781 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 20:20:35,800 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 20:20:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:20:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:35,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:35,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638235384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:36,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:20:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395527167] [2021-08-06 20:20:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:36,034 INFO L87 Difference]: Start difference. First operand 43 states and 72 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,092 INFO L93 Difference]: Finished difference Result 94 states and 153 transitions. [2021-08-06 20:20:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 20:20:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,096 INFO L225 Difference]: With dead ends: 94 [2021-08-06 20:20:36,096 INFO L226 Difference]: Without dead ends: 94 [2021-08-06 20:20:36,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-06 20:20:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2021-08-06 20:20:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 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 20:20:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2021-08-06 20:20:36,111 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 18 [2021-08-06 20:20:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,111 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2021-08-06 20:20:36,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2021-08-06 20:20:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:20:36,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,114 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 20:20:36,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 20:20:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:36,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1679843110, now seen corresponding path program 1 times [2021-08-06 20:20:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:36,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598284989] [2021-08-06 20:20:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:36,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598284989] [2021-08-06 20:20:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598284989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:36,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:36,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:20:36,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640549980] [2021-08-06 20:20:36,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:20:36,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:20:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:20:36,366 INFO L87 Difference]: Start difference. First operand 55 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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 20:20:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,390 INFO L93 Difference]: Finished difference Result 80 states and 129 transitions. [2021-08-06 20:20:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:20:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 20:20:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,391 INFO L225 Difference]: With dead ends: 80 [2021-08-06 20:20:36,391 INFO L226 Difference]: Without dead ends: 80 [2021-08-06 20:20:36,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-06 20:20:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-08-06 20:20:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-08-06 20:20:36,395 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 18 [2021-08-06 20:20:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,395 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-08-06 20:20:36,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) 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 20:20:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-08-06 20:20:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:20:36,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,396 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 20:20:36,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:20:36,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash -507554138, now seen corresponding path program 1 times [2021-08-06 20:20:36,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:36,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552115811] [2021-08-06 20:20:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:36,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:36,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552115811] [2021-08-06 20:20:36,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552115811] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:36,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:36,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:20:36,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490521677] [2021-08-06 20:20:36,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:20:36,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:20:36,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:20:36,425 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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 20:20:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,448 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-08-06 20:20:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:20:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 20:20:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,449 INFO L225 Difference]: With dead ends: 89 [2021-08-06 20:20:36,449 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 20:20:36,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 20:20:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-08-06 20:20:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 112 transitions. [2021-08-06 20:20:36,454 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 112 transitions. Word has length 18 [2021-08-06 20:20:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,455 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 112 transitions. [2021-08-06 20:20:36,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) 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 20:20:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 112 transitions. [2021-08-06 20:20:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:20:36,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,456 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 20:20:36,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:20:36,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1422657754, now seen corresponding path program 2 times [2021-08-06 20:20:36,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:36,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173923942] [2021-08-06 20:20:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:36,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:36,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173923942] [2021-08-06 20:20:36,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173923942] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:36,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:36,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:20:36,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411072690] [2021-08-06 20:20:36,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:20:36,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:20:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,495 INFO L87 Difference]: Start difference. First operand 65 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,522 INFO L93 Difference]: Finished difference Result 85 states and 139 transitions. [2021-08-06 20:20:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:20:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 20:20:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,524 INFO L225 Difference]: With dead ends: 85 [2021-08-06 20:20:36,524 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 20:20:36,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 20:20:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2021-08-06 20:20:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.75) internal successors, (105), 60 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 105 transitions. [2021-08-06 20:20:36,528 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 105 transitions. Word has length 18 [2021-08-06 20:20:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,528 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 105 transitions. [2021-08-06 20:20:36,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 105 transitions. [2021-08-06 20:20:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:20:36,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,529 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 20:20:36,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 20:20:36,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2079938906, now seen corresponding path program 2 times [2021-08-06 20:20:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:36,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010744576] [2021-08-06 20:20:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:36,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:36,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010744576] [2021-08-06 20:20:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010744576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:36,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:36,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:20:36,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170235845] [2021-08-06 20:20:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:20:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:20:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,586 INFO L87 Difference]: Start difference. First operand 61 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,613 INFO L93 Difference]: Finished difference Result 72 states and 123 transitions. [2021-08-06 20:20:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:20:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 20:20:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,614 INFO L225 Difference]: With dead ends: 72 [2021-08-06 20:20:36,615 INFO L226 Difference]: Without dead ends: 72 [2021-08-06 20:20:36,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-06 20:20:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-08-06 20:20:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 55 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 95 transitions. [2021-08-06 20:20:36,619 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 95 transitions. Word has length 18 [2021-08-06 20:20:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,619 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 95 transitions. [2021-08-06 20:20:36,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 95 transitions. [2021-08-06 20:20:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:20:36,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,620 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 20:20:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 20:20:36,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1352742088, now seen corresponding path program 1 times [2021-08-06 20:20:36,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:36,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29880077] [2021-08-06 20:20:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:36,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:36,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29880077] [2021-08-06 20:20:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29880077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:36,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861426438] [2021-08-06 20:20:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:36,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:36,659 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 20:20:36,661 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 20:20:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:20:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:36,811 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:36,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:36,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861426438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:36,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:36,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:20:36,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856510498] [2021-08-06 20:20:36,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:36,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:36,845 INFO L87 Difference]: Start difference. First operand 56 states and 95 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,883 INFO L93 Difference]: Finished difference Result 100 states and 173 transitions. [2021-08-06 20:20:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:20:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,885 INFO L225 Difference]: With dead ends: 100 [2021-08-06 20:20:36,885 INFO L226 Difference]: Without dead ends: 100 [2021-08-06 20:20:36,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-06 20:20:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-08-06 20:20:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 72 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 139 transitions. [2021-08-06 20:20:36,889 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 139 transitions. Word has length 20 [2021-08-06 20:20:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,889 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 139 transitions. [2021-08-06 20:20:36,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 139 transitions. [2021-08-06 20:20:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:36,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:36,890 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 20:20:36,915 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 20:20:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-06 20:20:37,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash -952930330, now seen corresponding path program 1 times [2021-08-06 20:20:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776797252] [2021-08-06 20:20:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:37,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:37,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:37,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:37,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:37,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776797252] [2021-08-06 20:20:37,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776797252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:37,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753296560] [2021-08-06 20:20:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:37,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:37,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:37,241 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 20:20:37,242 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 20:20:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:37,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-08-06 20:20:37,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:20:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753296560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:37,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:37,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 20:20:37,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056738131] [2021-08-06 20:20:37,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:20:37,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:20:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:37,805 INFO L87 Difference]: Start difference. First operand 73 states and 139 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 20:20:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:37,872 INFO L93 Difference]: Finished difference Result 155 states and 273 transitions. [2021-08-06 20:20:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:20:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:37,874 INFO L225 Difference]: With dead ends: 155 [2021-08-06 20:20:37,875 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 20:20:37,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 20:20:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2021-08-06 20:20:37,879 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 20:20:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:20:37,880 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 22 [2021-08-06 20:20:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:20:37,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 20:20:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:20:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:37,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:37,881 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 20:20:37,910 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 20:20:38,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:38,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash -699141206, now seen corresponding path program 2 times [2021-08-06 20:20:38,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:38,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613215765] [2021-08-06 20:20:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:38,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:38,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:38,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:38,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:38,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613215765] [2021-08-06 20:20:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613215765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:38,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561493184] [2021-08-06 20:20:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:38,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:38,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:38,217 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 20:20:38,266 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 20:20:38,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:20:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:20:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:38,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561493184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:38,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:38,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 20:20:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045532315] [2021-08-06 20:20:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:20:38,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:20:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:38,815 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:38,894 INFO L93 Difference]: Finished difference Result 161 states and 291 transitions. [2021-08-06 20:20:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:38,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:20:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:38,895 INFO L225 Difference]: With dead ends: 161 [2021-08-06 20:20:38,895 INFO L226 Difference]: Without dead ends: 156 [2021-08-06 20:20:38,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-06 20:20:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2021-08-06 20:20:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.981818181818182) internal successors, (218), 110 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 218 transitions. [2021-08-06 20:20:38,901 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 218 transitions. Word has length 22 [2021-08-06 20:20:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:38,901 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 218 transitions. [2021-08-06 20:20:38,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 218 transitions. [2021-08-06 20:20:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:38,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:38,902 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 20:20:38,931 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 20:20:39,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:39,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2002710362, now seen corresponding path program 3 times [2021-08-06 20:20:39,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:39,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270669621] [2021-08-06 20:20:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:39,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:39,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:39,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:39,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270669621] [2021-08-06 20:20:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270669621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:39,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437170942] [2021-08-06 20:20:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:39,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:39,231 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 20:20:39,268 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 20:20:39,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:20:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-08-06 20:20:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 20:20:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437170942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:39,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:39,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:20:39,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842675756] [2021-08-06 20:20:39,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:20:39,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:20:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:39,885 INFO L87 Difference]: Start difference. First operand 111 states and 218 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:39,969 INFO L93 Difference]: Finished difference Result 180 states and 329 transitions. [2021-08-06 20:20:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:39,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:20:39,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:39,971 INFO L225 Difference]: With dead ends: 180 [2021-08-06 20:20:39,971 INFO L226 Difference]: Without dead ends: 175 [2021-08-06 20:20:39,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-06 20:20:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 119. [2021-08-06 20:20:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 235 transitions. [2021-08-06 20:20:39,975 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 235 transitions. Word has length 22 [2021-08-06 20:20:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:39,976 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 235 transitions. [2021-08-06 20:20:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 235 transitions. [2021-08-06 20:20:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:39,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:39,976 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 20:20:40,005 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 20:20:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 20:20:40,201 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1223140714, now seen corresponding path program 4 times [2021-08-06 20:20:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:40,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058822088] [2021-08-06 20:20:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:40,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:40,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:40,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:20:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058822088] [2021-08-06 20:20:40,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058822088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217397412] [2021-08-06 20:20:40,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:20:40,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:40,316 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 20:20:40,317 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 20:20:40,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:20:40,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-08-06 20:20:40,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 20:20:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:40,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217397412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:40,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:40,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 20:20:40,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357150083] [2021-08-06 20:20:40,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:40,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:40,888 INFO L87 Difference]: Start difference. First operand 119 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:40,961 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2021-08-06 20:20:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 20:20:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:40,963 INFO L225 Difference]: With dead ends: 164 [2021-08-06 20:20:40,963 INFO L226 Difference]: Without dead ends: 159 [2021-08-06 20:20:40,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-06 20:20:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-08-06 20:20:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9918032786885247) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 243 transitions. [2021-08-06 20:20:40,967 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 243 transitions. Word has length 22 [2021-08-06 20:20:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:40,967 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 243 transitions. [2021-08-06 20:20:40,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 243 transitions. [2021-08-06 20:20:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:40,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:40,968 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 20:20:41,015 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 20:20:41,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:41,191 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash 105771814, now seen corresponding path program 5 times [2021-08-06 20:20:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:41,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550421900] [2021-08-06 20:20:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:41,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:41,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:20:41,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:20:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:41,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:41,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550421900] [2021-08-06 20:20:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550421900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:41,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356118451] [2021-08-06 20:20:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:20:41,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:41,351 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 20:20:41,353 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 20:20:41,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:20:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 20:20:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:41,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356118451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:41,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:41,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:20:41,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623088225] [2021-08-06 20:20:41,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:20:41,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:20:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:41,952 INFO L87 Difference]: Start difference. First operand 123 states and 243 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:42,032 INFO L93 Difference]: Finished difference Result 168 states and 314 transitions. [2021-08-06 20:20:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 20:20:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:42,033 INFO L225 Difference]: With dead ends: 168 [2021-08-06 20:20:42,034 INFO L226 Difference]: Without dead ends: 163 [2021-08-06 20:20:42,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-06 20:20:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2021-08-06 20:20:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 257 transitions. [2021-08-06 20:20:42,037 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 257 transitions. Word has length 22 [2021-08-06 20:20:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 257 transitions. [2021-08-06 20:20:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 257 transitions. [2021-08-06 20:20:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:42,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:42,038 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 20:20:42,074 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 20:20:42,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:42,264 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 738910886, now seen corresponding path program 6 times [2021-08-06 20:20:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:42,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889671858] [2021-08-06 20:20:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:42,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:42,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:20:42,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:20:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:42,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889671858] [2021-08-06 20:20:42,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889671858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638489440] [2021-08-06 20:20:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:20:42,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:42,356 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 20:20:42,357 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 20:20:42,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 20:20:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:20:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:42,821 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:20:42,821 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 55 treesize of output 49 [2021-08-06 20:20:42,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:20:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638489440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:42,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:42,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 20:20:42,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861407167] [2021-08-06 20:20:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:20:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:20:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:42,999 INFO L87 Difference]: Start difference. First operand 131 states and 257 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:43,074 INFO L93 Difference]: Finished difference Result 176 states and 328 transitions. [2021-08-06 20:20:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:20:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:20:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:43,077 INFO L225 Difference]: With dead ends: 176 [2021-08-06 20:20:43,077 INFO L226 Difference]: Without dead ends: 171 [2021-08-06 20:20:43,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-06 20:20:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2021-08-06 20:20:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 257 transitions. [2021-08-06 20:20:43,082 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 257 transitions. Word has length 22 [2021-08-06 20:20:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:43,083 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 257 transitions. [2021-08-06 20:20:43,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 257 transitions. [2021-08-06 20:20:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:43,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:43,084 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 20:20:43,133 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 20:20:43,307 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,SelfDestructingSolverStorable12 [2021-08-06 20:20:43,308 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash 908895368, now seen corresponding path program 7 times [2021-08-06 20:20:43,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:43,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752345661] [2021-08-06 20:20:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:43,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:43,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:43,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752345661] [2021-08-06 20:20:43,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752345661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:43,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522845965] [2021-08-06 20:20:43,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:20:43,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:43,356 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 20:20:43,432 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 20:20:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:43,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:43,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522845965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:43,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:20:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842562752] [2021-08-06 20:20:43,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:20:43,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:20:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:43,831 INFO L87 Difference]: Start difference. First operand 131 states and 257 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:43,907 INFO L93 Difference]: Finished difference Result 256 states and 501 transitions. [2021-08-06 20:20:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:43,909 INFO L225 Difference]: With dead ends: 256 [2021-08-06 20:20:43,909 INFO L226 Difference]: Without dead ends: 256 [2021-08-06 20:20:43,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:20:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-06 20:20:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2021-08-06 20:20:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0344827586206895) internal successors, (354), 174 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 354 transitions. [2021-08-06 20:20:43,913 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 354 transitions. Word has length 24 [2021-08-06 20:20:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:43,914 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 354 transitions. [2021-08-06 20:20:43,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 354 transitions. [2021-08-06 20:20:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:43,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:43,914 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 20:20:43,939 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 20:20:44,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 20:20:44,130 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1348748292, now seen corresponding path program 8 times [2021-08-06 20:20:44,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:44,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123219262] [2021-08-06 20:20:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:44,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:44,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123219262] [2021-08-06 20:20:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123219262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116412268] [2021-08-06 20:20:44,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:44,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:44,185 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 20:20:44,231 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 20:20:44,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:20:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116412268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:44,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:44,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 20:20:44,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851256587] [2021-08-06 20:20:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:20:44,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:20:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:20:44,677 INFO L87 Difference]: Start difference. First operand 175 states and 354 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 20:20:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:45,118 INFO L93 Difference]: Finished difference Result 548 states and 1090 transitions. [2021-08-06 20:20:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:20:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:45,120 INFO L225 Difference]: With dead ends: 548 [2021-08-06 20:20:45,120 INFO L226 Difference]: Without dead ends: 548 [2021-08-06 20:20:45,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:20:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-06 20:20:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 306. [2021-08-06 20:20:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.0721311475409836) internal successors, (632), 305 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 632 transitions. [2021-08-06 20:20:45,131 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 632 transitions. Word has length 24 [2021-08-06 20:20:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:45,132 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 632 transitions. [2021-08-06 20:20:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 20:20:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 632 transitions. [2021-08-06 20:20:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:45,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:45,133 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 20:20:45,151 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 20:20:45,351 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,SelfDestructingSolverStorable14 [2021-08-06 20:20:45,351 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash -500999292, now seen corresponding path program 9 times [2021-08-06 20:20:45,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:45,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396197618] [2021-08-06 20:20:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:45,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:45,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:45,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396197618] [2021-08-06 20:20:45,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396197618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:45,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175354960] [2021-08-06 20:20:45,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:45,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:45,386 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 20:20:45,387 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 20:20:45,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:20:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:45,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:45,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:45,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175354960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:45,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:45,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:20:45,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348634150] [2021-08-06 20:20:45,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:20:45,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:20:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:45,782 INFO L87 Difference]: Start difference. First operand 306 states and 632 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:45,870 INFO L93 Difference]: Finished difference Result 553 states and 1085 transitions. [2021-08-06 20:20:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:45,872 INFO L225 Difference]: With dead ends: 553 [2021-08-06 20:20:45,872 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 20:20:45,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:20:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 20:20:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 430. [2021-08-06 20:20:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.1002331002331003) internal successors, (901), 429 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 901 transitions. [2021-08-06 20:20:45,880 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 901 transitions. Word has length 24 [2021-08-06 20:20:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:45,880 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 901 transitions. [2021-08-06 20:20:45,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 901 transitions. [2021-08-06 20:20:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:45,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:45,881 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 20:20:45,900 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 20:20:46,094 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,SelfDestructingSolverStorable15 [2021-08-06 20:20:46,095 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1784310908, now seen corresponding path program 10 times [2021-08-06 20:20:46,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:46,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728449833] [2021-08-06 20:20:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:46,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:46,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:46,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728449833] [2021-08-06 20:20:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728449833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:46,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453502785] [2021-08-06 20:20:46,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:20:46,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:46,132 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 20:20:46,133 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 20:20:46,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:20:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:46,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:46,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:46,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453502785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:46,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:46,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:20:46,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29901494] [2021-08-06 20:20:46,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:46,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:46,486 INFO L87 Difference]: Start difference. First operand 430 states and 901 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:46,545 INFO L93 Difference]: Finished difference Result 509 states and 1026 transitions. [2021-08-06 20:20:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:46,547 INFO L225 Difference]: With dead ends: 509 [2021-08-06 20:20:46,547 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 20:20:46,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:20:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 20:20:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 414. [2021-08-06 20:20:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0920096852300243) internal successors, (864), 413 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 864 transitions. [2021-08-06 20:20:46,555 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 864 transitions. Word has length 24 [2021-08-06 20:20:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:46,555 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 864 transitions. [2021-08-06 20:20:46,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 864 transitions. [2021-08-06 20:20:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:46,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:46,556 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 20:20:46,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 20:20:46,776 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,SelfDestructingSolverStorable16 [2021-08-06 20:20:46,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1696773576, now seen corresponding path program 11 times [2021-08-06 20:20:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:46,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312697798] [2021-08-06 20:20:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:46,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:46,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312697798] [2021-08-06 20:20:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312697798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:46,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065592474] [2021-08-06 20:20:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:20:46,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:46,815 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 20:20:46,816 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 20:20:47,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:47,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:47,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065592474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:47,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:47,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:20:47,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398568222] [2021-08-06 20:20:47,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:47,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:47,194 INFO L87 Difference]: Start difference. First operand 414 states and 864 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:47,245 INFO L93 Difference]: Finished difference Result 820 states and 1639 transitions. [2021-08-06 20:20:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:20:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:47,248 INFO L225 Difference]: With dead ends: 820 [2021-08-06 20:20:47,248 INFO L226 Difference]: Without dead ends: 818 [2021-08-06 20:20:47,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-06 20:20:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 588. [2021-08-06 20:20:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.1379897785349233) internal successors, (1255), 587 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1255 transitions. [2021-08-06 20:20:47,259 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1255 transitions. Word has length 24 [2021-08-06 20:20:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:47,259 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1255 transitions. [2021-08-06 20:20:47,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1255 transitions. [2021-08-06 20:20:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:47,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:47,261 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 20:20:47,279 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 20:20:47,478 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,SelfDestructingSolverStorable17 [2021-08-06 20:20:47,479 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1405727288, now seen corresponding path program 12 times [2021-08-06 20:20:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:47,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654887308] [2021-08-06 20:20:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:47,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:47,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:47,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654887308] [2021-08-06 20:20:47,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654887308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:47,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922615644] [2021-08-06 20:20:47,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:20:47,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:47,541 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 20:20:47,558 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 20:20:47,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:20:47,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:20:47,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922615644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:47,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 20:20:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917870434] [2021-08-06 20:20:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:20:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:20:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:20:47,975 INFO L87 Difference]: Start difference. First operand 588 states and 1255 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 20:20:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:48,548 INFO L93 Difference]: Finished difference Result 1560 states and 3023 transitions. [2021-08-06 20:20:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:20:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:48,554 INFO L225 Difference]: With dead ends: 1560 [2021-08-06 20:20:48,554 INFO L226 Difference]: Without dead ends: 1548 [2021-08-06 20:20:48,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:20:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-08-06 20:20:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 866. [2021-08-06 20:20:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.2184971098265898) internal successors, (1919), 865 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1919 transitions. [2021-08-06 20:20:48,575 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1919 transitions. Word has length 24 [2021-08-06 20:20:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:48,575 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1919 transitions. [2021-08-06 20:20:48,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 20:20:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1919 transitions. [2021-08-06 20:20:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:48,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:48,577 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 20:20:48,601 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 20:20:48,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:48,794 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1134257736, now seen corresponding path program 13 times [2021-08-06 20:20:48,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:48,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890139674] [2021-08-06 20:20:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:48,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:48,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:48,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890139674] [2021-08-06 20:20:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890139674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:48,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770193423] [2021-08-06 20:20:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:20:48,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:48,884 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 20:20:48,885 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 20:20:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:49,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:49,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:20:49,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770193423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:49,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:49,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:20:49,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809373417] [2021-08-06 20:20:49,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:20:49,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:20:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:20:49,309 INFO L87 Difference]: Start difference. First operand 866 states and 1919 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 20:20:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:49,360 INFO L93 Difference]: Finished difference Result 1529 states and 3278 transitions. [2021-08-06 20:20:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:49,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 20:20:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:49,365 INFO L225 Difference]: With dead ends: 1529 [2021-08-06 20:20:49,366 INFO L226 Difference]: Without dead ends: 1529 [2021-08-06 20:20:49,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:20:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-08-06 20:20:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1135. [2021-08-06 20:20:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.267195767195767) internal successors, (2571), 1134 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2571 transitions. [2021-08-06 20:20:49,422 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2571 transitions. Word has length 24 [2021-08-06 20:20:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:49,422 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 2571 transitions. [2021-08-06 20:20:49,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 20:20:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2571 transitions. [2021-08-06 20:20:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:49,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:49,425 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 20:20:49,447 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 20:20:49,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:49,648 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -945799160, now seen corresponding path program 14 times [2021-08-06 20:20:49,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:49,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370406213] [2021-08-06 20:20:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:49,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:49,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:49,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370406213] [2021-08-06 20:20:49,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370406213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:49,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997160823] [2021-08-06 20:20:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:49,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:49,701 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 20:20:49,721 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 20:20:50,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:50,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:20:50,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:50,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:50,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:20:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:20:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997160823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:50,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:50,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-06 20:20:50,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791440786] [2021-08-06 20:20:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:20:50,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:20:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:50,131 INFO L87 Difference]: Start difference. First operand 1135 states and 2571 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 20:20:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:50,341 INFO L93 Difference]: Finished difference Result 3065 states and 6521 transitions. [2021-08-06 20:20:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:20:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 20:20:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:50,353 INFO L225 Difference]: With dead ends: 3065 [2021-08-06 20:20:50,354 INFO L226 Difference]: Without dead ends: 3039 [2021-08-06 20:20:50,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:20:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-08-06 20:20:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2569. [2021-08-06 20:20:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2568 states have (on average 2.303738317757009) internal successors, (5916), 2568 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 5916 transitions. [2021-08-06 20:20:50,405 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 5916 transitions. Word has length 24 [2021-08-06 20:20:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:50,406 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 5916 transitions. [2021-08-06 20:20:50,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 20:20:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 5916 transitions. [2021-08-06 20:20:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:50,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:50,411 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 20:20:50,435 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 20:20:50,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:50,633 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1776783368, now seen corresponding path program 15 times [2021-08-06 20:20:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:50,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44101247] [2021-08-06 20:20:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:50,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:50,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:50,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44101247] [2021-08-06 20:20:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44101247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:50,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479938542] [2021-08-06 20:20:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:50,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:50,692 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 20:20:50,744 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 20:20:51,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:20:51,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:20:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:51,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479938542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:51,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:51,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 20:20:51,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917126241] [2021-08-06 20:20:51,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:20:51,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:20:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:20:51,214 INFO L87 Difference]: Start difference. First operand 2569 states and 5916 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 20:20:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:51,704 INFO L93 Difference]: Finished difference Result 3115 states and 6749 transitions. [2021-08-06 20:20:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:20:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:20:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:51,715 INFO L225 Difference]: With dead ends: 3115 [2021-08-06 20:20:51,716 INFO L226 Difference]: Without dead ends: 3111 [2021-08-06 20:20:51,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=404, Invalid=1402, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:20:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-08-06 20:20:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2516. [2021-08-06 20:20:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 2.299005964214712) internal successors, (5782), 2515 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 5782 transitions. [2021-08-06 20:20:51,766 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 5782 transitions. Word has length 24 [2021-08-06 20:20:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:51,766 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 5782 transitions. [2021-08-06 20:20:51,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 20:20:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 5782 transitions. [2021-08-06 20:20:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:20:51,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:51,771 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 20:20:51,809 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 20:20:51,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:51,992 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1369242248, now seen corresponding path program 16 times [2021-08-06 20:20:51,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:51,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846072511] [2021-08-06 20:20:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:51,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:52,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846072511] [2021-08-06 20:20:52,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846072511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24013831] [2021-08-06 20:20:52,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:20:52,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:52,063 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 20:20:52,087 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 20:20:52,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:20:52,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:20:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:52,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:52,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:20:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24013831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:52,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:20:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615771139] [2021-08-06 20:20:52,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:20:52,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:20:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:20:52,582 INFO L87 Difference]: Start difference. First operand 2516 states and 5782 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 20:20:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:52,661 INFO L93 Difference]: Finished difference Result 2926 states and 6634 transitions. [2021-08-06 20:20:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 24 [2021-08-06 20:20:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:52,670 INFO L225 Difference]: With dead ends: 2926 [2021-08-06 20:20:52,670 INFO L226 Difference]: Without dead ends: 2926 [2021-08-06 20:20:52,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:20:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-06 20:20:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2787. [2021-08-06 20:20:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 2.2796123474515433) internal successors, (6351), 2786 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 6351 transitions. [2021-08-06 20:20:52,775 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 6351 transitions. Word has length 24 [2021-08-06 20:20:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:52,775 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 6351 transitions. [2021-08-06 20:20:52,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 20:20:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 6351 transitions. [2021-08-06 20:20:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:20:52,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:52,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:52,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 20:20:53,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:53,009 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 312062916, now seen corresponding path program 17 times [2021-08-06 20:20:53,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:53,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048935325] [2021-08-06 20:20:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:53,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:53,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:53,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:53,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:53,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048935325] [2021-08-06 20:20:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048935325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470716781] [2021-08-06 20:20:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:20:53,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:53,353 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 20:20:53,379 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 20:20:53,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:20:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:20:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:54,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 20:20:54,429 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:20:54,429 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 57 treesize of output 48 [2021-08-06 20:20:54,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-06 20:20:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:54,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470716781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:54,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:54,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 20:20:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754665327] [2021-08-06 20:20:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:20:54,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:20:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:20:54,520 INFO L87 Difference]: Start difference. First operand 2787 states and 6351 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:55,216 INFO L93 Difference]: Finished difference Result 3338 states and 7298 transitions. [2021-08-06 20:20:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:20:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:55,228 INFO L225 Difference]: With dead ends: 3338 [2021-08-06 20:20:55,228 INFO L226 Difference]: Without dead ends: 3333 [2021-08-06 20:20:55,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:20:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-08-06 20:20:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 2825. [2021-08-06 20:20:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 2.2790368271954673) internal successors, (6436), 2824 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 6436 transitions. [2021-08-06 20:20:55,280 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 6436 transitions. Word has length 28 [2021-08-06 20:20:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:55,280 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 6436 transitions. [2021-08-06 20:20:55,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 6436 transitions. [2021-08-06 20:20:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:20:55,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:55,286 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:55,333 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 20:20:55,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:55,504 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:55,505 INFO L82 PathProgramCache]: Analyzing trace with hash -609724792, now seen corresponding path program 18 times [2021-08-06 20:20:55,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:55,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482813680] [2021-08-06 20:20:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:55,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:55,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:55,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:55,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:20:55,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:20:55,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:55,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:55,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:55,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482813680] [2021-08-06 20:20:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482813680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:55,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127527330] [2021-08-06 20:20:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:20:55,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:55,816 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 20:20:55,817 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 20:20:56,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:20:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:20:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-06 20:20:57,154 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:20:57,154 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 57 treesize of output 48 [2021-08-06 20:20:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-06 20:20:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:57,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127527330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:57,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:57,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 20:20:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483946617] [2021-08-06 20:20:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:20:57,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:20:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:20:57,231 INFO L87 Difference]: Start difference. First operand 2825 states and 6436 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:57,773 INFO L93 Difference]: Finished difference Result 3383 states and 7396 transitions. [2021-08-06 20:20:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:20:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:57,783 INFO L225 Difference]: With dead ends: 3383 [2021-08-06 20:20:57,783 INFO L226 Difference]: Without dead ends: 3376 [2021-08-06 20:20:57,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:20:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-08-06 20:20:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2842. [2021-08-06 20:20:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.278071101724745) internal successors, (6472), 2841 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 6472 transitions. [2021-08-06 20:20:57,845 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 6472 transitions. Word has length 28 [2021-08-06 20:20:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 6472 transitions. [2021-08-06 20:20:57,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:20:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 6472 transitions. [2021-08-06 20:20:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:20:57,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:57,853 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:57,887 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 20:20:58,073 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,SelfDestructingSolverStorable24 [2021-08-06 20:20:58,073 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -355935668, now seen corresponding path program 19 times [2021-08-06 20:20:58,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:58,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781206354] [2021-08-06 20:20:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:58,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:58,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:58,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:20:58,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:20:58,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:20:58,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:20:58,370 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:20:58,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:58,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:20:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:58,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:58,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781206354] [2021-08-06 20:20:58,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781206354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:58,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426011672] [2021-08-06 20:20:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:20:58,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:58,410 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 20:20:58,411 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 20:20:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:20:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:59,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-06 20:20:59,652 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:20:59,652 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 48 treesize of output 39 [2021-08-06 20:20:59,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-06 20:20:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:59,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426011672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:59,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:59,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 20:20:59,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181422141] [2021-08-06 20:20:59,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:20:59,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:20:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:20:59,780 INFO L87 Difference]: Start difference. First operand 2842 states and 6472 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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 20:21:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:21:00,402 INFO L93 Difference]: Finished difference Result 3393 states and 7425 transitions. [2021-08-06 20:21:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:21:00,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 20:21:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:21:00,410 INFO L225 Difference]: With dead ends: 3393 [2021-08-06 20:21:00,410 INFO L226 Difference]: Without dead ends: 3388 [2021-08-06 20:21:00,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:21:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2021-08-06 20:21:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 2857. [2021-08-06 20:21:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 2.2769607843137254) internal successors, (6503), 2856 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:21:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 6503 transitions. [2021-08-06 20:21:00,455 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 6503 transitions. Word has length 28 [2021-08-06 20:21:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:21:00,455 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 6503 transitions. [2021-08-06 20:21:00,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) 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 20:21:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 6503 transitions. [2021-08-06 20:21:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:21:00,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:21:00,461 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:21:00,486 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 20:21:00,681 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,SelfDestructingSolverStorable25 [2021-08-06 20:21:00,681 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:21:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:21:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1596118408, now seen corresponding path program 20 times [2021-08-06 20:21:00,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:21:00,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715902099] [2021-08-06 20:21:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:21:00,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:21:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:21:00,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:21:00,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:21:00,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:21:00,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:21:00,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:21:00,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:21:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:21:00,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:21:00,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715902099] [2021-08-06 20:21:00,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715902099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:21:00,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385569138] [2021-08-06 20:21:00,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:21:00,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:21:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:21:00,996 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 20:21:00,997 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 20:21:01,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:21:01,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:21:01,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:21:01,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:21:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 20:21:02,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2021-08-06 20:21:02,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-06 20:21:02,500 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:21:02,500 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 39 treesize of output 30 [2021-08-06 20:21:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:21:02,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385569138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:21:02,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:21:02,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 20:21:02,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482520476] [2021-08-06 20:21:02,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:21:02,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:21:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:21:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:21:02,576 INFO L87 Difference]: Start difference. First operand 2857 states and 6503 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:21:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:21:03,141 INFO L93 Difference]: Finished difference Result 3400 states and 7441 transitions. [2021-08-06 20:21:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:21:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:21:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:21:03,148 INFO L225 Difference]: With dead ends: 3400 [2021-08-06 20:21:03,148 INFO L226 Difference]: Without dead ends: 3395 [2021-08-06 20:21:03,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:21:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-08-06 20:21:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2884. [2021-08-06 20:21:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 2.2761012833853624) internal successors, (6562), 2883 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:21:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 6562 transitions. [2021-08-06 20:21:03,188 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 6562 transitions. Word has length 28 [2021-08-06 20:21:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:21:03,188 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 6562 transitions. [2021-08-06 20:21:03,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:21:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 6562 transitions. [2021-08-06 20:21:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:21:03,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:21:03,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:21:03,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 20:21:03,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 20:21:03,418 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:21:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:21:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1849907532, now seen corresponding path program 21 times [2021-08-06 20:21:03,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:21:03,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022502343] [2021-08-06 20:21:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:21:03,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:21:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:21:03,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:21:03,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 20:21:03,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:21:03,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.7 percent of original size [2021-08-06 20:21:03,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:21:03,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:21:03,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:21:03,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:21:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:21:03,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:21:03,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022502343] [2021-08-06 20:21:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022502343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:21:03,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519731230] [2021-08-06 20:21:03,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:21:03,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:21:03,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:21:03,718 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 20:21:03,719 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 20:21:04,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:21:04,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:21:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:21:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:21:04,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 20:21:05,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-08-06 20:21:05,273 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:21:05,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 62 [2021-08-06 20:21:05,598 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-06 20:21:05,623 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 20:21:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:21:05,813 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:80) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:75) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:918) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:880) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:798) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:151) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-06 20:21:05,816 INFO L168 Benchmark]: Toolchain (without parser) took 31078.30 ms. Allocated memory was 203.4 MB in the beginning and 738.2 MB in the end (delta: 534.8 MB). Free memory was 183.9 MB in the beginning and 392.9 MB in the end (delta: -209.0 MB). Peak memory consumption was 327.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:21:05,816 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.54 ms. Allocated memory is still 203.4 MB. Free memory is still 184.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:21:05,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.17 ms. Allocated memory is still 203.4 MB. Free memory was 183.7 MB in the beginning and 182.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:21:05,816 INFO L168 Benchmark]: Boogie Preprocessor took 12.87 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 181.3 MB in the end (delta: 852.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:21:05,816 INFO L168 Benchmark]: RCFGBuilder took 280.72 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 167.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:21:05,816 INFO L168 Benchmark]: TraceAbstraction took 30760.98 ms. Allocated memory was 203.4 MB in the beginning and 738.2 MB in the end (delta: 534.8 MB). Free memory was 167.1 MB in the beginning and 392.9 MB in the end (delta: -225.8 MB). Peak memory consumption was 309.8 MB. Max. memory is 8.0 GB. [2021-08-06 20:21:05,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.54 ms. Allocated memory is still 203.4 MB. Free memory is still 184.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.17 ms. Allocated memory is still 203.4 MB. Free memory was 183.7 MB in the beginning and 182.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.87 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 181.3 MB in the end (delta: 852.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 280.72 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 167.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30760.98 ms. Allocated memory was 203.4 MB in the beginning and 738.2 MB in the end (delta: 534.8 MB). Free memory was 167.1 MB in the beginning and 392.9 MB in the end (delta: -225.8 MB). Peak memory consumption was 309.8 MB. 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: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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 - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-06 20:21:05,848 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 Received shutdown request...