/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/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:06:31,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:06:31,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:06:31,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:06:31,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:06:31,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:06:31,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:06:31,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:06:31,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:06:31,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:06:31,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:06:31,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:06:31,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:06:31,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:06:31,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:06:31,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:06:31,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:06:31,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:06:31,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:06:31,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:06:31,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:06:31,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:06:31,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:06:31,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:06:31,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:06:31,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:06:31,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:06:31,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:06:31,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:06:31,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:06:31,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:06:31,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:06:31,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:06:31,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:06:31,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:06:31,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:06:31,245 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 [2021-08-21 18:06:31,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:06:31,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:06:31,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:06:31,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:06:31,282 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:06:31,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:06:31,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:06:31,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:06:31,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:06:31,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:06:31,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:06:31,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:06:31,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:06:31,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:06:31,286 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:06:31,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:06:31,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:06:31,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:06:31,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:06:31,641 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:06:31,642 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:06:31,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-08-21 18:06:31,644 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-08-21 18:06:31,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:06:31,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:06:31,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:06:31,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:06:31,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:06:31,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:06:31,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:06:31,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:06:31,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:06:31,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:06:31,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:06:31,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:06:31,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:06:31,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/1) ... [2021-08-21 18:06:31,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:06:31,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:31,771 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) [2021-08-21 18:06:31,777 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 [2021-08-21 18:06:31,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:06:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:06:31,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:06:31,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:06:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:06:31,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:06:31,811 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:06:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:06:31,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:06:31,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:06:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:06:31,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:06:31,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 18:06:31,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 18:06:31,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 18:06:31,814 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 18:06:31,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 18:06:31,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 18:06:31,815 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:06:32,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:06:32,092 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:06:32,094 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:32 BoogieIcfgContainer [2021-08-21 18:06:32,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:06:32,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:06:32,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:06:32,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:06:32,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:06:31" (1/2) ... [2021-08-21 18:06:32,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b7d42f and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:32, skipping insertion in model container [2021-08-21 18:06:32,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:32" (2/2) ... [2021-08-21 18:06:32,101 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-08-21 18:06:32,105 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:06:32,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:06:32,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:06:32,105 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:06:32,174 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-08-21 18:06:32,210 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:06:32,215 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 [2021-08-21 18:06:32,216 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-21 18:06:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 2846 states, 1891 states have (on average 3.203595980962454) internal successors, (6058), 2845 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:06:32,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:32,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:32,746 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 252975757, now seen corresponding path program 1 times [2021-08-21 18:06:32,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:32,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310044387] [2021-08-21 18:06:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:32,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:32,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310044387] [2021-08-21 18:06:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310044387] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:32,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:32,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:32,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711993423] [2021-08-21 18:06:32,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:32,978 INFO L87 Difference]: Start difference. First operand has 2846 states, 1891 states have (on average 3.203595980962454) internal successors, (6058), 2845 states have internal predecessors, (6058), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:33,076 INFO L93 Difference]: Finished difference Result 3785 states and 8149 transitions. [2021-08-21 18:06:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:06:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:33,108 INFO L225 Difference]: With dead ends: 3785 [2021-08-21 18:06:33,108 INFO L226 Difference]: Without dead ends: 882 [2021-08-21 18:06:33,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-08-21 18:06:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-08-21 18:06:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.236095346197503) internal successors, (2851), 881 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2851 transitions. [2021-08-21 18:06:33,195 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2851 transitions. Word has length 27 [2021-08-21 18:06:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:33,196 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2851 transitions. [2021-08-21 18:06:33,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2851 transitions. [2021-08-21 18:06:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:06:33,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:33,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:06:33,201 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1809926277, now seen corresponding path program 2 times [2021-08-21 18:06:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:33,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217168509] [2021-08-21 18:06:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:33,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:33,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:33,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217168509] [2021-08-21 18:06:33,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217168509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:33,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:33,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:06:33,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027056987] [2021-08-21 18:06:33,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:06:33,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:06:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:33,320 INFO L87 Difference]: Start difference. First operand 882 states and 2851 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:33,483 INFO L93 Difference]: Finished difference Result 3628 states and 12303 transitions. [2021-08-21 18:06:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:06:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:06:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:33,498 INFO L225 Difference]: With dead ends: 3628 [2021-08-21 18:06:33,498 INFO L226 Difference]: Without dead ends: 1942 [2021-08-21 18:06:33,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-08-21 18:06:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1069. [2021-08-21 18:06:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.1320224719101124) internal successors, (3345), 1068 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3345 transitions. [2021-08-21 18:06:33,561 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3345 transitions. Word has length 27 [2021-08-21 18:06:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:33,562 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3345 transitions. [2021-08-21 18:06:33,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3345 transitions. [2021-08-21 18:06:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:06:33,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:33,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:33,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:06:33,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash -422917811, now seen corresponding path program 3 times [2021-08-21 18:06:33,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:33,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396568992] [2021-08-21 18:06:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:33,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:33,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:33,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396568992] [2021-08-21 18:06:33,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396568992] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:33,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:33,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:06:33,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239040220] [2021-08-21 18:06:33,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:06:33,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:06:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:33,646 INFO L87 Difference]: Start difference. First operand 1069 states and 3345 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:33,772 INFO L93 Difference]: Finished difference Result 4663 states and 15866 transitions. [2021-08-21 18:06:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:06:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:06:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:33,797 INFO L225 Difference]: With dead ends: 4663 [2021-08-21 18:06:33,798 INFO L226 Difference]: Without dead ends: 3041 [2021-08-21 18:06:33,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-08-21 18:06:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1088. [2021-08-21 18:06:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.1738730450781967) internal successors, (3450), 1087 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3450 transitions. [2021-08-21 18:06:33,882 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3450 transitions. Word has length 27 [2021-08-21 18:06:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:33,882 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 3450 transitions. [2021-08-21 18:06:33,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3450 transitions. [2021-08-21 18:06:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:06:33,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:33,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:33,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:06:33,887 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:33,888 INFO L82 PathProgramCache]: Analyzing trace with hash 967980365, now seen corresponding path program 4 times [2021-08-21 18:06:33,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:33,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209229383] [2021-08-21 18:06:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:33,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:33,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:33,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209229383] [2021-08-21 18:06:33,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209229383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:33,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:33,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810582732] [2021-08-21 18:06:33,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:33,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:33,952 INFO L87 Difference]: Start difference. First operand 1088 states and 3450 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:33,971 INFO L93 Difference]: Finished difference Result 1350 states and 4480 transitions. [2021-08-21 18:06:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:06:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:33,977 INFO L225 Difference]: With dead ends: 1350 [2021-08-21 18:06:33,978 INFO L226 Difference]: Without dead ends: 896 [2021-08-21 18:06:33,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-08-21 18:06:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2021-08-21 18:06:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.03463687150838) internal successors, (2716), 895 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2716 transitions. [2021-08-21 18:06:34,004 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2716 transitions. Word has length 27 [2021-08-21 18:06:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:34,004 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2716 transitions. [2021-08-21 18:06:34,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2716 transitions. [2021-08-21 18:06:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:34,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:34,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:06:34,008 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1163296007, now seen corresponding path program 1 times [2021-08-21 18:06:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:34,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112318375] [2021-08-21 18:06:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:34,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:34,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:34,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112318375] [2021-08-21 18:06:34,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112318375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:34,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583944237] [2021-08-21 18:06:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:34,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:34,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:34,142 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) [2021-08-21 18:06:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:06:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:34,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:06:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:34,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583944237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:34,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:06:34,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-21 18:06:34,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813318127] [2021-08-21 18:06:34,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:34,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:34,341 INFO L87 Difference]: Start difference. First operand 896 states and 2716 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:34,399 INFO L93 Difference]: Finished difference Result 1909 states and 6131 transitions. [2021-08-21 18:06:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:34,412 INFO L225 Difference]: With dead ends: 1909 [2021-08-21 18:06:34,412 INFO L226 Difference]: Without dead ends: 1909 [2021-08-21 18:06:34,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:06:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-08-21 18:06:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1177. [2021-08-21 18:06:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.256802721088435) internal successors, (3830), 1176 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3830 transitions. [2021-08-21 18:06:34,459 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3830 transitions. Word has length 29 [2021-08-21 18:06:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:34,460 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 3830 transitions. [2021-08-21 18:06:34,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3830 transitions. [2021-08-21 18:06:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:34,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:34,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:34,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:06:34,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:34,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:34,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1356249283, now seen corresponding path program 1 times [2021-08-21 18:06:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:34,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800789261] [2021-08-21 18:06:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:34,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:34,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:34,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800789261] [2021-08-21 18:06:34,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800789261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:34,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110898680] [2021-08-21 18:06:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:34,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:34,774 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) [2021-08-21 18:06:34,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:06:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:06:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:34,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110898680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:34,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:34,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 18:06:34,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461367672] [2021-08-21 18:06:34,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:06:34,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:34,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:06:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:06:34,953 INFO L87 Difference]: Start difference. First operand 1177 states and 3830 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:35,022 INFO L93 Difference]: Finished difference Result 2347 states and 7337 transitions. [2021-08-21 18:06:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:06:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:35,039 INFO L225 Difference]: With dead ends: 2347 [2021-08-21 18:06:35,039 INFO L226 Difference]: Without dead ends: 2347 [2021-08-21 18:06:35,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:06:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-08-21 18:06:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1381. [2021-08-21 18:06:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.402898550724638) internal successors, (4696), 1380 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4696 transitions. [2021-08-21 18:06:35,091 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4696 transitions. Word has length 29 [2021-08-21 18:06:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:35,091 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 4696 transitions. [2021-08-21 18:06:35,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4696 transitions. [2021-08-21 18:06:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:35,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:35,096 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:35,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:35,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 18:06:35,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1174500615, now seen corresponding path program 2 times [2021-08-21 18:06:35,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:35,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980844079] [2021-08-21 18:06:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:35,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:35,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:35,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980844079] [2021-08-21 18:06:35,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980844079] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:35,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:35,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625571645] [2021-08-21 18:06:35,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:35,355 INFO L87 Difference]: Start difference. First operand 1381 states and 4696 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:35,412 INFO L93 Difference]: Finished difference Result 1867 states and 5886 transitions. [2021-08-21 18:06:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:35,424 INFO L225 Difference]: With dead ends: 1867 [2021-08-21 18:06:35,424 INFO L226 Difference]: Without dead ends: 1867 [2021-08-21 18:06:35,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-08-21 18:06:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1501. [2021-08-21 18:06:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.3973333333333335) internal successors, (5096), 1500 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5096 transitions. [2021-08-21 18:06:35,482 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5096 transitions. Word has length 29 [2021-08-21 18:06:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:35,483 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5096 transitions. [2021-08-21 18:06:35,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5096 transitions. [2021-08-21 18:06:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:35,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:35,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:06:35,488 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash 592262211, now seen corresponding path program 1 times [2021-08-21 18:06:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486935397] [2021-08-21 18:06:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:35,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:35,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486935397] [2021-08-21 18:06:35,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486935397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289301499] [2021-08-21 18:06:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:35,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:35,573 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) [2021-08-21 18:06:35,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:06:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:06:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:35,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289301499] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:35,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:06:35,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-21 18:06:35,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665411076] [2021-08-21 18:06:35,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:35,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:35,749 INFO L87 Difference]: Start difference. First operand 1501 states and 5096 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:35,803 INFO L93 Difference]: Finished difference Result 1821 states and 6000 transitions. [2021-08-21 18:06:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:35,829 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 18:06:35,830 INFO L226 Difference]: Without dead ends: 1801 [2021-08-21 18:06:35,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:06:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-08-21 18:06:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1545. [2021-08-21 18:06:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.343264248704663) internal successors, (5162), 1544 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5162 transitions. [2021-08-21 18:06:35,877 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5162 transitions. Word has length 29 [2021-08-21 18:06:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:35,877 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 5162 transitions. [2021-08-21 18:06:35,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5162 transitions. [2021-08-21 18:06:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:35,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:35,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:35,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:36,109 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 [2021-08-21 18:06:36,109 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1425271881, now seen corresponding path program 1 times [2021-08-21 18:06:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:36,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329105708] [2021-08-21 18:06:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:36,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:36,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:36,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329105708] [2021-08-21 18:06:36,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329105708] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:36,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:36,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:36,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556420404] [2021-08-21 18:06:36,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:36,144 INFO L87 Difference]: Start difference. First operand 1545 states and 5162 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:36,200 INFO L93 Difference]: Finished difference Result 2599 states and 8343 transitions. [2021-08-21 18:06:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:36,209 INFO L225 Difference]: With dead ends: 2599 [2021-08-21 18:06:36,209 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 18:06:36,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 18:06:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1881. [2021-08-21 18:06:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.3170212765957445) internal successors, (6236), 1880 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6236 transitions. [2021-08-21 18:06:36,296 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6236 transitions. Word has length 29 [2021-08-21 18:06:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:36,296 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 6236 transitions. [2021-08-21 18:06:36,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6236 transitions. [2021-08-21 18:06:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:36,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:36,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:36,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 18:06:36,303 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1787564567, now seen corresponding path program 2 times [2021-08-21 18:06:36,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:36,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340812685] [2021-08-21 18:06:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:36,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:36,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:36,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340812685] [2021-08-21 18:06:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340812685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564304158] [2021-08-21 18:06:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:36,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:36,392 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) [2021-08-21 18:06:36,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:06:36,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:36,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:36,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:06:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564304158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:36,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:36,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-08-21 18:06:36,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309117379] [2021-08-21 18:06:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:06:36,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:06:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:36,634 INFO L87 Difference]: Start difference. First operand 1881 states and 6236 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:37,200 INFO L93 Difference]: Finished difference Result 8967 states and 29336 transitions. [2021-08-21 18:06:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:06:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:37,228 INFO L225 Difference]: With dead ends: 8967 [2021-08-21 18:06:37,228 INFO L226 Difference]: Without dead ends: 6887 [2021-08-21 18:06:37,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:06:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-08-21 18:06:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2283. [2021-08-21 18:06:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 3.3843120070113937) internal successors, (7723), 2282 states have internal predecessors, (7723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 7723 transitions. [2021-08-21 18:06:37,378 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 7723 transitions. Word has length 29 [2021-08-21 18:06:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:37,379 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 7723 transitions. [2021-08-21 18:06:37,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 7723 transitions. [2021-08-21 18:06:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:37,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:37,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:37,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:37,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:37,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash -138662935, now seen corresponding path program 2 times [2021-08-21 18:06:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:37,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610267241] [2021-08-21 18:06:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:37,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:37,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:37,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610267241] [2021-08-21 18:06:37,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610267241] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:37,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:37,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:37,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446041086] [2021-08-21 18:06:37,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:37,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:37,644 INFO L87 Difference]: Start difference. First operand 2283 states and 7723 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:37,684 INFO L93 Difference]: Finished difference Result 2559 states and 8518 transitions. [2021-08-21 18:06:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:06:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:37,695 INFO L225 Difference]: With dead ends: 2559 [2021-08-21 18:06:37,695 INFO L226 Difference]: Without dead ends: 2559 [2021-08-21 18:06:37,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-08-21 18:06:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2209. [2021-08-21 18:06:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 3.4057971014492754) internal successors, (7520), 2208 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 7520 transitions. [2021-08-21 18:06:37,762 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 7520 transitions. Word has length 29 [2021-08-21 18:06:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:37,762 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 7520 transitions. [2021-08-21 18:06:37,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 7520 transitions. [2021-08-21 18:06:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:37,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:37,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:37,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:06:37,771 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -618483837, now seen corresponding path program 3 times [2021-08-21 18:06:37,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:37,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406848482] [2021-08-21 18:06:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:37,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:37,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:37,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406848482] [2021-08-21 18:06:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406848482] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:37,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:37,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:06:37,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616265276] [2021-08-21 18:06:37,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:06:37,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:06:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:37,832 INFO L87 Difference]: Start difference. First operand 2209 states and 7520 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:37,885 INFO L93 Difference]: Finished difference Result 2584 states and 8633 transitions. [2021-08-21 18:06:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:37,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:37,895 INFO L225 Difference]: With dead ends: 2584 [2021-08-21 18:06:37,895 INFO L226 Difference]: Without dead ends: 2488 [2021-08-21 18:06:37,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-08-21 18:06:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2020. [2021-08-21 18:06:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.392768697374938) internal successors, (6850), 2019 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6850 transitions. [2021-08-21 18:06:37,950 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6850 transitions. Word has length 29 [2021-08-21 18:06:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:37,950 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6850 transitions. [2021-08-21 18:06:37,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6850 transitions. [2021-08-21 18:06:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:06:37,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:37,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:37,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 18:06:37,957 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2049086237, now seen corresponding path program 3 times [2021-08-21 18:06:37,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:37,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803506733] [2021-08-21 18:06:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:37,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:37,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:37,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803506733] [2021-08-21 18:06:37,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803506733] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:37,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:06:37,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:06:37,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855237426] [2021-08-21 18:06:37,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:37,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:06:37,989 INFO L87 Difference]: Start difference. First operand 2020 states and 6850 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:38,044 INFO L93 Difference]: Finished difference Result 3171 states and 10494 transitions. [2021-08-21 18:06:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:06:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:38,056 INFO L225 Difference]: With dead ends: 3171 [2021-08-21 18:06:38,056 INFO L226 Difference]: Without dead ends: 3145 [2021-08-21 18:06:38,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:06:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-08-21 18:06:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2060. [2021-08-21 18:06:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 3.4099077221952405) internal successors, (7021), 2059 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 7021 transitions. [2021-08-21 18:06:38,133 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 7021 transitions. Word has length 29 [2021-08-21 18:06:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:38,133 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 7021 transitions. [2021-08-21 18:06:38,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:38,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 7021 transitions. [2021-08-21 18:06:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:06:38,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:38,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:38,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 18:06:38,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1578432645, now seen corresponding path program 1 times [2021-08-21 18:06:38,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:38,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264213734] [2021-08-21 18:06:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:38,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:38,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:38,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264213734] [2021-08-21 18:06:38,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264213734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:38,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393033798] [2021-08-21 18:06:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:38,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:38,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:38,217 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) [2021-08-21 18:06:38,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:06:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:06:38,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393033798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:38,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:38,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-08-21 18:06:38,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316003468] [2021-08-21 18:06:38,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:06:38,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:06:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:06:38,422 INFO L87 Difference]: Start difference. First operand 2060 states and 7021 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:39,495 INFO L93 Difference]: Finished difference Result 12273 states and 40574 transitions. [2021-08-21 18:06:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:06:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:06:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:39,520 INFO L225 Difference]: With dead ends: 12273 [2021-08-21 18:06:39,520 INFO L226 Difference]: Without dead ends: 6250 [2021-08-21 18:06:39,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=729, Invalid=2693, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:06:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-08-21 18:06:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 2033. [2021-08-21 18:06:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.3631889763779528) internal successors, (6834), 2032 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6834 transitions. [2021-08-21 18:06:39,613 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6834 transitions. Word has length 31 [2021-08-21 18:06:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 6834 transitions. [2021-08-21 18:06:39,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6834 transitions. [2021-08-21 18:06:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:06:39,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:39,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:39,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:39,843 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,SelfDestructingSolverStorable13 [2021-08-21 18:06:39,843 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -397350771, now seen corresponding path program 2 times [2021-08-21 18:06:39,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:39,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628166388] [2021-08-21 18:06:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:39,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:39,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:39,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628166388] [2021-08-21 18:06:39,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628166388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:39,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899472959] [2021-08-21 18:06:39,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:39,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:39,891 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) [2021-08-21 18:06:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:06:40,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:40,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:06:40,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:40,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899472959] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:06:40,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:06:40,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-08-21 18:06:40,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149581801] [2021-08-21 18:06:40,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:06:40,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:06:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:06:40,098 INFO L87 Difference]: Start difference. First operand 2033 states and 6834 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-08-21 18:06:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:40,147 INFO L93 Difference]: Finished difference Result 2247 states and 7628 transitions. [2021-08-21 18:06:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:06:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:06:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:40,157 INFO L225 Difference]: With dead ends: 2247 [2021-08-21 18:06:40,157 INFO L226 Difference]: Without dead ends: 2074 [2021-08-21 18:06:40,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:06:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-08-21 18:06:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1798. [2021-08-21 18:06:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.3889816360601004) internal successors, (6090), 1797 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6090 transitions. [2021-08-21 18:06:40,209 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6090 transitions. Word has length 31 [2021-08-21 18:06:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:40,210 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 6090 transitions. [2021-08-21 18:06:40,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-08-21 18:06:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6090 transitions. [2021-08-21 18:06:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:06:40,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:40,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:40,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:40,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:06:40,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1631990481, now seen corresponding path program 1 times [2021-08-21 18:06:40,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:40,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250634325] [2021-08-21 18:06:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:40,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:40,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:40,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250634325] [2021-08-21 18:06:40,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250634325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:40,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136829468] [2021-08-21 18:06:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:40,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:40,511 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) [2021-08-21 18:06:40,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:06:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:06:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:40,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-21 18:06:40,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:06:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:40,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136829468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:40,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:40,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:06:40,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990854881] [2021-08-21 18:06:40,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:06:40,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:06:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:06:40,850 INFO L87 Difference]: Start difference. First operand 1798 states and 6090 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:41,037 INFO L93 Difference]: Finished difference Result 4721 states and 15795 transitions. [2021-08-21 18:06:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:06:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:06:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:41,043 INFO L225 Difference]: With dead ends: 4721 [2021-08-21 18:06:41,043 INFO L226 Difference]: Without dead ends: 2757 [2021-08-21 18:06:41,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:06:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-08-21 18:06:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1696. [2021-08-21 18:06:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 3.426548672566372) internal successors, (5808), 1695 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 5808 transitions. [2021-08-21 18:06:41,097 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 5808 transitions. Word has length 35 [2021-08-21 18:06:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 5808 transitions. [2021-08-21 18:06:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 5808 transitions. [2021-08-21 18:06:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:06:41,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:41,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:41,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:41,317 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1581713941, now seen corresponding path program 2 times [2021-08-21 18:06:41,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:41,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748551015] [2021-08-21 18:06:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:41,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:41,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:41,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748551015] [2021-08-21 18:06:41,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748551015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:41,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626791061] [2021-08-21 18:06:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:41,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:41,365 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) [2021-08-21 18:06:41,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:06:41,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:06:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:06:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:41,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626791061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:41,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:41,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 18:06:41,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068836012] [2021-08-21 18:06:41,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:06:41,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:06:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:06:41,805 INFO L87 Difference]: Start difference. First operand 1696 states and 5808 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:42,057 INFO L93 Difference]: Finished difference Result 6878 states and 23316 transitions. [2021-08-21 18:06:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:06:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:06:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:42,066 INFO L225 Difference]: With dead ends: 6878 [2021-08-21 18:06:42,067 INFO L226 Difference]: Without dead ends: 4046 [2021-08-21 18:06:42,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:06:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-08-21 18:06:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 1659. [2021-08-21 18:06:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 3.379372738238842) internal successors, (5603), 1658 states have internal predecessors, (5603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 5603 transitions. [2021-08-21 18:06:42,115 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 5603 transitions. Word has length 35 [2021-08-21 18:06:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 5603 transitions. [2021-08-21 18:06:42,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 5603 transitions. [2021-08-21 18:06:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:06:42,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:42,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:42,332 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,SelfDestructingSolverStorable16 [2021-08-21 18:06:42,333 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2107026511, now seen corresponding path program 3 times [2021-08-21 18:06:42,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:42,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489705580] [2021-08-21 18:06:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:42,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:42,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:42,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489705580] [2021-08-21 18:06:42,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489705580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:42,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629506742] [2021-08-21 18:06:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:06:42,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:42,383 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) [2021-08-21 18:06:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:06:42,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:06:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:06:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 18:06:42,607 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 [2021-08-21 18:06:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:42,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629506742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:42,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:42,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 18:06:42,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621579168] [2021-08-21 18:06:42,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:06:42,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:06:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:06:42,674 INFO L87 Difference]: Start difference. First operand 1659 states and 5603 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) [2021-08-21 18:06:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:42,789 INFO L93 Difference]: Finished difference Result 5522 states and 17882 transitions. [2021-08-21 18:06:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:06:42,789 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 35 [2021-08-21 18:06:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:42,796 INFO L225 Difference]: With dead ends: 5522 [2021-08-21 18:06:42,796 INFO L226 Difference]: Without dead ends: 3253 [2021-08-21 18:06:42,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:06:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2021-08-21 18:06:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 1729. [2021-08-21 18:06:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 3.3234953703703702) internal successors, (5743), 1728 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 5743 transitions. [2021-08-21 18:06:42,838 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 5743 transitions. Word has length 35 [2021-08-21 18:06:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:42,839 INFO L470 AbstractCegarLoop]: Abstraction has 1729 states and 5743 transitions. [2021-08-21 18:06:42,839 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) [2021-08-21 18:06:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 5743 transitions. [2021-08-21 18:06:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:06:42,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:42,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:42,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:43,067 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,SelfDestructingSolverStorable17 [2021-08-21 18:06:43,067 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -779622395, now seen corresponding path program 4 times [2021-08-21 18:06:43,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:43,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244880966] [2021-08-21 18:06:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:43,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:43,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:43,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244880966] [2021-08-21 18:06:43,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244880966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:43,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875141544] [2021-08-21 18:06:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:43,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:43,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:43,171 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) [2021-08-21 18:06:43,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:06:43,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:06:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 18:06:43,422 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 [2021-08-21 18:06:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:43,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875141544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:43,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:43,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:06:43,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421583670] [2021-08-21 18:06:43,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:06:43,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:06:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:06:43,470 INFO L87 Difference]: Start difference. First operand 1729 states and 5743 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:43,614 INFO L93 Difference]: Finished difference Result 5594 states and 18794 transitions. [2021-08-21 18:06:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:06:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:06:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:43,621 INFO L225 Difference]: With dead ends: 5594 [2021-08-21 18:06:43,622 INFO L226 Difference]: Without dead ends: 3276 [2021-08-21 18:06:43,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:06:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-21 18:06:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 1774. [2021-08-21 18:06:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.298364354201918) internal successors, (5848), 1773 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5848 transitions. [2021-08-21 18:06:43,663 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5848 transitions. Word has length 35 [2021-08-21 18:06:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 5848 transitions. [2021-08-21 18:06:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5848 transitions. [2021-08-21 18:06:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:43,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:43,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:43,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:43,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:43,875 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 14789363, now seen corresponding path program 5 times [2021-08-21 18:06:43,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:43,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345646828] [2021-08-21 18:06:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:43,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:43,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:43,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345646828] [2021-08-21 18:06:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345646828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:43,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145633590] [2021-08-21 18:06:43,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:43,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:43,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:43,940 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) [2021-08-21 18:06:43,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:06:44,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:06:44,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:06:44,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:44,180 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-21 18:06:44,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 36 [2021-08-21 18:06:44,305 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 32 treesize of output 26 [2021-08-21 18:06:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:44,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145633590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:44,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:44,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 14 [2021-08-21 18:06:44,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058114138] [2021-08-21 18:06:44,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:06:44,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:06:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:06:44,539 INFO L87 Difference]: Start difference. First operand 1774 states and 5848 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:47,150 INFO L93 Difference]: Finished difference Result 9567 states and 32827 transitions. [2021-08-21 18:06:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:06:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:47,164 INFO L225 Difference]: With dead ends: 9567 [2021-08-21 18:06:47,165 INFO L226 Difference]: Without dead ends: 6313 [2021-08-21 18:06:47,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1926.8ms TimeCoverageRelationStatistics Valid=739, Invalid=3167, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:06:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-08-21 18:06:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 3190. [2021-08-21 18:06:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3189 states have (on average 3.208529319535905) internal successors, (10232), 3189 states have internal predecessors, (10232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 10232 transitions. [2021-08-21 18:06:47,245 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 10232 transitions. Word has length 37 [2021-08-21 18:06:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:47,245 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 10232 transitions. [2021-08-21 18:06:47,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 10232 transitions. [2021-08-21 18:06:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:47,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:47,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:47,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:47,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:47,454 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1314886333, now seen corresponding path program 6 times [2021-08-21 18:06:47,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:47,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11115132] [2021-08-21 18:06:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:47,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:47,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:47,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11115132] [2021-08-21 18:06:47,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11115132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:47,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253886711] [2021-08-21 18:06:47,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:47,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:47,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:47,525 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) [2021-08-21 18:06:47,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:06:47,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:06:47,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:06:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:47,843 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-21 18:06:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-08-21 18:06:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:06:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:47,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253886711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:47,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:47,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 18:06:47,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955260792] [2021-08-21 18:06:47,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:06:47,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:06:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:06:47,986 INFO L87 Difference]: Start difference. First operand 3190 states and 10232 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:49,568 INFO L93 Difference]: Finished difference Result 26233 states and 87195 transitions. [2021-08-21 18:06:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-21 18:06:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:49,610 INFO L225 Difference]: With dead ends: 26233 [2021-08-21 18:06:49,610 INFO L226 Difference]: Without dead ends: 13777 [2021-08-21 18:06:49,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=1473, Invalid=5837, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:06:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2021-08-21 18:06:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 4512. [2021-08-21 18:06:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 4511 states have (on average 3.309909111061849) internal successors, (14931), 4511 states have internal predecessors, (14931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 14931 transitions. [2021-08-21 18:06:49,776 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 14931 transitions. Word has length 37 [2021-08-21 18:06:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 14931 transitions. [2021-08-21 18:06:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 14931 transitions. [2021-08-21 18:06:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:49,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:49,785 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:49,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:49,985 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,SelfDestructingSolverStorable20 [2021-08-21 18:06:49,985 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash 362546051, now seen corresponding path program 7 times [2021-08-21 18:06:49,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:49,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259021860] [2021-08-21 18:06:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:49,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:50,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:50,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259021860] [2021-08-21 18:06:50,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259021860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:50,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685605337] [2021-08-21 18:06:50,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:06:50,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:50,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:50,026 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) [2021-08-21 18:06:50,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:06:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:06:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:06:50,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685605337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:50,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:50,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:06:50,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251435567] [2021-08-21 18:06:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:06:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:06:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:06:50,291 INFO L87 Difference]: Start difference. First operand 4512 states and 14931 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:50,418 INFO L93 Difference]: Finished difference Result 8881 states and 29610 transitions. [2021-08-21 18:06:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:06:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:50,440 INFO L225 Difference]: With dead ends: 8881 [2021-08-21 18:06:50,441 INFO L226 Difference]: Without dead ends: 8881 [2021-08-21 18:06:50,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8881 states. [2021-08-21 18:06:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8881 to 5452. [2021-08-21 18:06:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.504311135571455) internal successors, (19102), 5451 states have internal predecessors, (19102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19102 transitions. [2021-08-21 18:06:50,579 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19102 transitions. Word has length 37 [2021-08-21 18:06:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:50,579 INFO L470 AbstractCegarLoop]: Abstraction has 5452 states and 19102 transitions. [2021-08-21 18:06:50,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19102 transitions. [2021-08-21 18:06:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:50,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:50,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:50,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:50,790 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,SelfDestructingSolverStorable21 [2021-08-21 18:06:50,791 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 16918663, now seen corresponding path program 8 times [2021-08-21 18:06:50,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:50,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349362442] [2021-08-21 18:06:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:50,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:50,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:50,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349362442] [2021-08-21 18:06:50,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349362442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:50,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999331729] [2021-08-21 18:06:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:50,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:50,830 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) [2021-08-21 18:06:50,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:06:51,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:51,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:06:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:06:51,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999331729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:51,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:51,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 18:06:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434454736] [2021-08-21 18:06:51,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:06:51,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:06:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:51,163 INFO L87 Difference]: Start difference. First operand 5452 states and 19102 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:51,693 INFO L93 Difference]: Finished difference Result 19072 states and 63786 transitions. [2021-08-21 18:06:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:06:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:51,740 INFO L225 Difference]: With dead ends: 19072 [2021-08-21 18:06:51,740 INFO L226 Difference]: Without dead ends: 18206 [2021-08-21 18:06:51,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:06:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18206 states. [2021-08-21 18:06:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18206 to 9265. [2021-08-21 18:06:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9265 states, 9264 states have (on average 3.7322970639032813) internal successors, (34576), 9264 states have internal predecessors, (34576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9265 states to 9265 states and 34576 transitions. [2021-08-21 18:06:52,033 INFO L78 Accepts]: Start accepts. Automaton has 9265 states and 34576 transitions. Word has length 37 [2021-08-21 18:06:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:52,033 INFO L470 AbstractCegarLoop]: Abstraction has 9265 states and 34576 transitions. [2021-08-21 18:06:52,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9265 states and 34576 transitions. [2021-08-21 18:06:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:52,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:52,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:52,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:52,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:52,254 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash -269391615, now seen corresponding path program 9 times [2021-08-21 18:06:52,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:52,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903896803] [2021-08-21 18:06:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:52,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:52,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:52,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903896803] [2021-08-21 18:06:52,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903896803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:52,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498215552] [2021-08-21 18:06:52,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:06:52,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:52,340 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) [2021-08-21 18:06:52,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:06:52,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:06:52,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:06:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:06:52,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498215552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:52,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:52,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 18:06:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143816424] [2021-08-21 18:06:52,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:06:52,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:06:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:06:52,800 INFO L87 Difference]: Start difference. First operand 9265 states and 34576 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:53,167 INFO L93 Difference]: Finished difference Result 18500 states and 64653 transitions. [2021-08-21 18:06:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:06:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:53,217 INFO L225 Difference]: With dead ends: 18500 [2021-08-21 18:06:53,217 INFO L226 Difference]: Without dead ends: 18099 [2021-08-21 18:06:53,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:06:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-08-21 18:06:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 10808. [2021-08-21 18:06:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10808 states, 10807 states have (on average 3.783751272323494) internal successors, (40891), 10807 states have internal predecessors, (40891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10808 states to 10808 states and 40891 transitions. [2021-08-21 18:06:53,643 INFO L78 Accepts]: Start accepts. Automaton has 10808 states and 40891 transitions. Word has length 37 [2021-08-21 18:06:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 10808 states and 40891 transitions. [2021-08-21 18:06:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10808 states and 40891 transitions. [2021-08-21 18:06:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:53,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:53,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:53,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:53,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:53,866 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1619236995, now seen corresponding path program 10 times [2021-08-21 18:06:53,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:53,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761089608] [2021-08-21 18:06:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:53,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:53,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:53,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761089608] [2021-08-21 18:06:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761089608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:53,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823313912] [2021-08-21 18:06:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:53,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:53,973 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) [2021-08-21 18:06:53,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:06:54,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:06:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:54,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823313912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:54,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:54,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:06:54,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018975253] [2021-08-21 18:06:54,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:06:54,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:06:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:06:54,274 INFO L87 Difference]: Start difference. First operand 10808 states and 40891 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:54,524 INFO L93 Difference]: Finished difference Result 20454 states and 77150 transitions. [2021-08-21 18:06:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:06:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:54,612 INFO L225 Difference]: With dead ends: 20454 [2021-08-21 18:06:54,612 INFO L226 Difference]: Without dead ends: 20241 [2021-08-21 18:06:54,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:06:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20241 states. [2021-08-21 18:06:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20241 to 14344. [2021-08-21 18:06:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14344 states, 14343 states have (on average 3.916614376350833) internal successors, (56176), 14343 states have internal predecessors, (56176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14344 states to 14344 states and 56176 transitions. [2021-08-21 18:06:55,216 INFO L78 Accepts]: Start accepts. Automaton has 14344 states and 56176 transitions. Word has length 37 [2021-08-21 18:06:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:55,216 INFO L470 AbstractCegarLoop]: Abstraction has 14344 states and 56176 transitions. [2021-08-21 18:06:55,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14344 states and 56176 transitions. [2021-08-21 18:06:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:55,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:55,248 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:55,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 18:06:55,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 18:06:55,449 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2112644119, now seen corresponding path program 11 times [2021-08-21 18:06:55,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:55,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103486995] [2021-08-21 18:06:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:55,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:55,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:55,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103486995] [2021-08-21 18:06:55,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103486995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:55,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126735353] [2021-08-21 18:06:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:55,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:55,537 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) [2021-08-21 18:06:55,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:06:55,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:06:55,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:06:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:55,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126735353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:55,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:55,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:06:55,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026629846] [2021-08-21 18:06:55,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:06:55,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:06:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:06:55,892 INFO L87 Difference]: Start difference. First operand 14344 states and 56176 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:56,116 INFO L93 Difference]: Finished difference Result 19119 states and 72866 transitions. [2021-08-21 18:06:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:06:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:56,185 INFO L225 Difference]: With dead ends: 19119 [2021-08-21 18:06:56,185 INFO L226 Difference]: Without dead ends: 19119 [2021-08-21 18:06:56,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:06:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19119 states. [2021-08-21 18:06:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19119 to 14382. [2021-08-21 18:06:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 3.9068910367846463) internal successors, (56185), 14381 states have internal predecessors, (56185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 56185 transitions. [2021-08-21 18:06:56,585 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 56185 transitions. Word has length 37 [2021-08-21 18:06:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:56,585 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 56185 transitions. [2021-08-21 18:06:56,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 56185 transitions. [2021-08-21 18:06:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:06:56,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:56,618 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:56,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:06:56,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:06:56,818 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:06:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -284494013, now seen corresponding path program 12 times [2021-08-21 18:06:56,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:56,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339933163] [2021-08-21 18:06:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:56,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:06:56,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:56,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339933163] [2021-08-21 18:06:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339933163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:56,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611849601] [2021-08-21 18:06:56,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:56,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:56,846 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) [2021-08-21 18:06:56,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:06:57,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:06:57,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:57,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:06:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611849601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:57,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:57,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 18:06:57,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429117688] [2021-08-21 18:06:57,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:06:57,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:06:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:06:57,228 INFO L87 Difference]: Start difference. First operand 14382 states and 56185 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:58,515 INFO L93 Difference]: Finished difference Result 67344 states and 271623 transitions. [2021-08-21 18:06:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:06:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:06:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:59,000 INFO L225 Difference]: With dead ends: 67344 [2021-08-21 18:06:59,000 INFO L226 Difference]: Without dead ends: 67344 [2021-08-21 18:06:59,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:06:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67344 states. [2021-08-21 18:07:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67344 to 30275. [2021-08-21 18:07:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30275 states, 30274 states have (on average 4.343165752791174) internal successors, (131485), 30274 states have internal predecessors, (131485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30275 states to 30275 states and 131485 transitions. [2021-08-21 18:07:00,468 INFO L78 Accepts]: Start accepts. Automaton has 30275 states and 131485 transitions. Word has length 37 [2021-08-21 18:07:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:00,468 INFO L470 AbstractCegarLoop]: Abstraction has 30275 states and 131485 transitions. [2021-08-21 18:07:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30275 states and 131485 transitions. [2021-08-21 18:07:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:07:00,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:00,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:00,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:01,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:07:01,018 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1749280383, now seen corresponding path program 13 times [2021-08-21 18:07:01,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:01,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316779287] [2021-08-21 18:07:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:01,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:07:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:01,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316779287] [2021-08-21 18:07:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316779287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:01,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175410133] [2021-08-21 18:07:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:01,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:01,055 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) [2021-08-21 18:07:01,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:07:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:07:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:07:01,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175410133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:01,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:01,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:07:01,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631187760] [2021-08-21 18:07:01,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:07:01,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:07:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:07:01,458 INFO L87 Difference]: Start difference. First operand 30275 states and 131485 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:02,220 INFO L93 Difference]: Finished difference Result 56182 states and 241401 transitions. [2021-08-21 18:07:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:07:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:07:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:02,544 INFO L225 Difference]: With dead ends: 56182 [2021-08-21 18:07:02,544 INFO L226 Difference]: Without dead ends: 55902 [2021-08-21 18:07:02,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:07:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55902 states. [2021-08-21 18:07:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55902 to 45231. [2021-08-21 18:07:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45231 states, 45230 states have (on average 4.455582577934999) internal successors, (201526), 45230 states have internal predecessors, (201526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45231 states to 45231 states and 201526 transitions. [2021-08-21 18:07:04,402 INFO L78 Accepts]: Start accepts. Automaton has 45231 states and 201526 transitions. Word has length 39 [2021-08-21 18:07:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:04,403 INFO L470 AbstractCegarLoop]: Abstraction has 45231 states and 201526 transitions. [2021-08-21 18:07:04,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45231 states and 201526 transitions. [2021-08-21 18:07:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:07:04,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:04,544 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:04,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 18:07:04,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:04,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1220103637, now seen corresponding path program 14 times [2021-08-21 18:07:04,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:04,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567387658] [2021-08-21 18:07:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:04,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:07:04,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:04,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567387658] [2021-08-21 18:07:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567387658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:04,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067568029] [2021-08-21 18:07:04,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:07:04,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:04,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:04,795 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) [2021-08-21 18:07:04,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:07:05,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:07:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:07:05,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:07:05,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067568029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:05,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:05,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 18:07:05,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306504075] [2021-08-21 18:07:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:07:05,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:07:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:07:05,376 INFO L87 Difference]: Start difference. First operand 45231 states and 201526 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:06,973 INFO L93 Difference]: Finished difference Result 115178 states and 494985 transitions. [2021-08-21 18:07:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:07:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:07:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:07,946 INFO L225 Difference]: With dead ends: 115178 [2021-08-21 18:07:07,946 INFO L226 Difference]: Without dead ends: 114162 [2021-08-21 18:07:07,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:07:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114162 states. [2021-08-21 18:07:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114162 to 79823. [2021-08-21 18:07:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79823 states, 79822 states have (on average 4.572373531106712) internal successors, (364976), 79822 states have internal predecessors, (364976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79823 states to 79823 states and 364976 transitions. [2021-08-21 18:07:11,946 INFO L78 Accepts]: Start accepts. Automaton has 79823 states and 364976 transitions. Word has length 39 [2021-08-21 18:07:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:11,946 INFO L470 AbstractCegarLoop]: Abstraction has 79823 states and 364976 transitions. [2021-08-21 18:07:11,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 79823 states and 364976 transitions. [2021-08-21 18:07:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:07:12,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:12,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:12,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:12,392 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,SelfDestructingSolverStorable28 [2021-08-21 18:07:12,393 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 442776905, now seen corresponding path program 15 times [2021-08-21 18:07:12,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:12,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398152128] [2021-08-21 18:07:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:12,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:07:12,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:12,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398152128] [2021-08-21 18:07:12,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398152128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:12,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314436948] [2021-08-21 18:07:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:07:12,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:12,430 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) [2021-08-21 18:07:12,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:07:13,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:07:13,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:13,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:07:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:07:13,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314436948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:13,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:07:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434674018] [2021-08-21 18:07:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:07:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:07:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:07:13,140 INFO L87 Difference]: Start difference. First operand 79823 states and 364976 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:14,091 INFO L93 Difference]: Finished difference Result 103528 states and 457607 transitions. [2021-08-21 18:07:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:07:14,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:07:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:15,018 INFO L225 Difference]: With dead ends: 103528 [2021-08-21 18:07:15,018 INFO L226 Difference]: Without dead ends: 101805 [2021-08-21 18:07:15,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:07:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101805 states. [2021-08-21 18:07:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101805 to 78626. [2021-08-21 18:07:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78626 states, 78625 states have (on average 4.559961844197138) internal successors, (358527), 78625 states have internal predecessors, (358527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78626 states to 78626 states and 358527 transitions. [2021-08-21 18:07:18,353 INFO L78 Accepts]: Start accepts. Automaton has 78626 states and 358527 transitions. Word has length 39 [2021-08-21 18:07:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:18,353 INFO L470 AbstractCegarLoop]: Abstraction has 78626 states and 358527 transitions. [2021-08-21 18:07:18,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 78626 states and 358527 transitions. [2021-08-21 18:07:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:07:18,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:18,617 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:18,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:18,819 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2017703229, now seen corresponding path program 16 times [2021-08-21 18:07:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:18,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849295915] [2021-08-21 18:07:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:18,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:07:18,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:18,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849295915] [2021-08-21 18:07:18,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849295915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:18,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687449761] [2021-08-21 18:07:18,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:07:18,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:18,860 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) [2021-08-21 18:07:18,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:07:19,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:07:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:07:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:07:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687449761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:19,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:07:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257911181] [2021-08-21 18:07:19,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:07:19,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:07:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:07:19,692 INFO L87 Difference]: Start difference. First operand 78626 states and 358527 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:20,779 INFO L93 Difference]: Finished difference Result 108028 states and 480266 transitions. [2021-08-21 18:07:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:07:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:07:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:21,720 INFO L225 Difference]: With dead ends: 108028 [2021-08-21 18:07:21,720 INFO L226 Difference]: Without dead ends: 106722 [2021-08-21 18:07:21,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:07:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106722 states. [2021-08-21 18:07:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106722 to 93147. [2021-08-21 18:07:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93147 states, 93146 states have (on average 4.508781912266764) internal successors, (419975), 93146 states have internal predecessors, (419975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93147 states to 93147 states and 419975 transitions. [2021-08-21 18:07:25,395 INFO L78 Accepts]: Start accepts. Automaton has 93147 states and 419975 transitions. Word has length 39 [2021-08-21 18:07:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 93147 states and 419975 transitions. [2021-08-21 18:07:25,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 93147 states and 419975 transitions. [2021-08-21 18:07:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:07:26,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:26,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:26,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:07:26,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:26,357 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 579155303, now seen corresponding path program 17 times [2021-08-21 18:07:26,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:26,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415618143] [2021-08-21 18:07:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:26,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:07:26,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415618143] [2021-08-21 18:07:26,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415618143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180412384] [2021-08-21 18:07:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:07:26,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:26,395 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) [2021-08-21 18:07:26,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:07:26,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:07:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:26,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:07:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:07:26,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180412384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:26,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:26,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 18:07:26,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413142493] [2021-08-21 18:07:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:07:26,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:07:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:07:26,778 INFO L87 Difference]: Start difference. First operand 93147 states and 419975 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:31,109 INFO L93 Difference]: Finished difference Result 281397 states and 1258956 transitions. [2021-08-21 18:07:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:07:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:07:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:33,555 INFO L225 Difference]: With dead ends: 281397 [2021-08-21 18:07:33,556 INFO L226 Difference]: Without dead ends: 280493 [2021-08-21 18:07:33,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=447, Invalid=1533, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:07:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280493 states. [2021-08-21 18:07:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280493 to 176322. [2021-08-21 18:07:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176322 states, 176321 states have (on average 4.624996455328634) internal successors, (815484), 176321 states have internal predecessors, (815484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176322 states to 176322 states and 815484 transitions. [2021-08-21 18:07:46,322 INFO L78 Accepts]: Start accepts. Automaton has 176322 states and 815484 transitions. Word has length 39 [2021-08-21 18:07:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:46,323 INFO L470 AbstractCegarLoop]: Abstraction has 176322 states and 815484 transitions. [2021-08-21 18:07:46,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 176322 states and 815484 transitions. [2021-08-21 18:07:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:07:47,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:47,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:47,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:07:48,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:48,087 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:07:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash 18613179, now seen corresponding path program 18 times [2021-08-21 18:07:48,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:48,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802397] [2021-08-21 18:07:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:48,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:07:48,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:48,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802397] [2021-08-21 18:07:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:48,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391223040] [2021-08-21 18:07:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:07:48,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:48,145 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:07:48,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:07:48,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:07:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:07:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:07:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391223040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:48,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:48,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-21 18:07:48,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560151362] [2021-08-21 18:07:48,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:07:48,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:07:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:07:48,560 INFO L87 Difference]: Start difference. First operand 176322 states and 815484 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:51,985 INFO L93 Difference]: Finished difference Result 240499 states and 1092307 transitions. [2021-08-21 18:07:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:07:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:07:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:54,298 INFO L225 Difference]: With dead ends: 240499 [2021-08-21 18:07:54,299 INFO L226 Difference]: Without dead ends: 239598 [2021-08-21 18:07:54,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:07:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239598 states. [2021-08-21 18:08:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239598 to 229254. [2021-08-21 18:08:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229254 states, 229253 states have (on average 4.585885462785656) internal successors, (1051328), 229253 states have internal predecessors, (1051328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229254 states to 229254 states and 1051328 transitions. [2021-08-21 18:08:05,812 INFO L78 Accepts]: Start accepts. Automaton has 229254 states and 1051328 transitions. Word has length 41 [2021-08-21 18:08:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:05,812 INFO L470 AbstractCegarLoop]: Abstraction has 229254 states and 1051328 transitions. [2021-08-21 18:08:05,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 229254 states and 1051328 transitions. [2021-08-21 18:08:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:08:07,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:07,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:07,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:07,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:07,365 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:08:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1800016409, now seen corresponding path program 19 times [2021-08-21 18:08:07,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:07,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448218330] [2021-08-21 18:08:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:07,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:08:07,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:07,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448218330] [2021-08-21 18:08:07,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448218330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:07,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850764281] [2021-08-21 18:08:07,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:08:07,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:07,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:07,411 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:08:07,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:08:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:08:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:08:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850764281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:08,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:08,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 18:08:08,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777148521] [2021-08-21 18:08:08,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:08:08,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:08:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:08:08,193 INFO L87 Difference]: Start difference. First operand 229254 states and 1051328 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:14,640 INFO L93 Difference]: Finished difference Result 340833 states and 1522794 transitions. [2021-08-21 18:08:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:08:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:08:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:18,317 INFO L225 Difference]: With dead ends: 340833 [2021-08-21 18:08:18,317 INFO L226 Difference]: Without dead ends: 338040 [2021-08-21 18:08:18,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:08:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338040 states. [2021-08-21 18:08:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338040 to 279248. [2021-08-21 18:08:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279248 states, 279247 states have (on average 4.5825129723864535) internal successors, (1279653), 279247 states have internal predecessors, (1279653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279248 states to 279248 states and 1279653 transitions. [2021-08-21 18:08:33,809 INFO L78 Accepts]: Start accepts. Automaton has 279248 states and 1279653 transitions. Word has length 41 [2021-08-21 18:08:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:33,810 INFO L470 AbstractCegarLoop]: Abstraction has 279248 states and 1279653 transitions. [2021-08-21 18:08:33,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 279248 states and 1279653 transitions. [2021-08-21 18:08:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:08:35,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:35,361 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:35,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:35,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 18:08:35,562 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:08:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -768761163, now seen corresponding path program 20 times [2021-08-21 18:08:35,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:35,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645203941] [2021-08-21 18:08:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:35,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:08:35,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:35,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645203941] [2021-08-21 18:08:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645203941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:35,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157087257] [2021-08-21 18:08:35,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:35,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:35,641 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:08:35,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:08:36,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:08:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:36,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:08:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 18:08:36,334 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-21 18:08:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-08-21 18:08:36,346 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 [2021-08-21 18:08:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 18:08:36,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157087257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:36,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:36,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 18:08:36,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103429864] [2021-08-21 18:08:36,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:08:36,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:08:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:08:36,407 INFO L87 Difference]: Start difference. First operand 279248 states and 1279653 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 18:08:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:50,498 INFO L93 Difference]: Finished difference Result 750536 states and 3444595 transitions. [2021-08-21 18:08:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:08:50,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:08:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:56,567 INFO L225 Difference]: With dead ends: 750536 [2021-08-21 18:08:56,567 INFO L226 Difference]: Without dead ends: 485325 [2021-08-21 18:08:56,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:08:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485325 states. [2021-08-21 18:09:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485325 to 220585. [2021-08-21 18:09:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220585 states, 220584 states have (on average 4.593755666775468) internal successors, (1013309), 220584 states have internal predecessors, (1013309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220585 states to 220585 states and 1013309 transitions. [2021-08-21 18:09:16,277 INFO L78 Accepts]: Start accepts. Automaton has 220585 states and 1013309 transitions. Word has length 43 [2021-08-21 18:09:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:16,277 INFO L470 AbstractCegarLoop]: Abstraction has 220585 states and 1013309 transitions. [2021-08-21 18:09:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 18:09:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 220585 states and 1013309 transitions. [2021-08-21 18:09:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:09:18,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:18,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:18,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:18,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 18:09:18,477 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2021-08-21 18:09:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash 39469317, now seen corresponding path program 21 times [2021-08-21 18:09:18,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:18,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483429185] [2021-08-21 18:09:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:18,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 18:09:18,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:18,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483429185] [2021-08-21 18:09:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483429185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:18,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895179075] [2021-08-21 18:09:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:09:18,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:18,685 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:09:19,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:09:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:09:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 18:09:19,440 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-21 18:09:19,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-08-21 18:09:19,447 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 [2021-08-21 18:09:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 18:09:19,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895179075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:19,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:19,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 18:09:19,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376814170] [2021-08-21 18:09:19,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:09:19,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:09:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:09:19,514 INFO L87 Difference]: Start difference. First operand 220585 states and 1013309 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) [2021-08-21 18:09:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:29,849 INFO L93 Difference]: Finished difference Result 512714 states and 2340228 transitions. [2021-08-21 18:09:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:09:29,865 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 43 [2021-08-21 18:09:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:35,257 INFO L225 Difference]: With dead ends: 512714 [2021-08-21 18:09:35,258 INFO L226 Difference]: Without dead ends: 322690 [2021-08-21 18:09:35,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156