/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:03:26,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:03:26,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:03:26,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:03:26,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:03:26,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:03:26,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:03:26,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:03:26,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:03:26,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:03:26,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:03:26,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:03:26,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:03:26,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:03:26,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:03:26,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:03:26,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:03:26,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:03:26,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:03:26,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:03:26,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:03:26,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:03:26,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:03:26,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:03:26,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 20:03:26,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:03:26,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:03:26,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:03:26,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 20:03:26,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:03:26,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:03:26,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:03:26,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:03:26,316 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:03:26,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:03:26,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:03:26,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:03:26,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:03:26,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:03:26,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:03:26,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:03:26,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:03:26,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:03:26,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:03:26,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:03:26,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:03:26,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:03:26,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:03:26,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:03:26,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:03:26,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:03:26,654 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:03:26,655 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:03:26,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-08-06 20:03:26,656 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-08-06 20:03:26,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:03:26,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:03:26,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:03:26,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:03:26,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:03:26,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:03:26,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:03:26,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:03:26,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:03:26,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:03:26,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:03:26,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:03:26,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:03:26,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/1) ... [2021-08-06 20:03:26,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:03:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:26,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 20:03:26,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 20:03:26,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:03:26,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:03:26,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:03:26,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:03:26,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:03:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:03:26,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:03:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:03:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:03:26,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:03:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:03:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:03:26,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 20:03:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 20:03:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 20:03:26,841 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:03:27,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:03:27,042 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:03:27,044 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:03:27 BoogieIcfgContainer [2021-08-06 20:03:27,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:03:27,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:03:27,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:03:27,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:03:27,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:26" (1/2) ... [2021-08-06 20:03:27,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e794d24 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:03:27, skipping insertion in model container [2021-08-06 20:03:27,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:03:27" (2/2) ... [2021-08-06 20:03:27,063 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-08-06 20:03:27,067 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:03:27,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:03:27,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:03:27,067 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:03:27,153 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 20:03:27,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:03:27,243 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:03:27,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 20:03:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 475 states have (on average 2.7178947368421054) internal successors, (1291), 709 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:03:27,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:27,501 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] [2021-08-06 20:03:27,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:27,504 INFO L82 PathProgramCache]: Analyzing trace with hash 121640407, now seen corresponding path program 1 times [2021-08-06 20:03:27,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:27,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622293005] [2021-08-06 20:03:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:27,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:27,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:27,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622293005] [2021-08-06 20:03:27,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622293005] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:27,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:27,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:03:27,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650802539] [2021-08-06 20:03:27,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:03:27,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:03:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:03:27,671 INFO L87 Difference]: Start difference. First operand has 710 states, 475 states have (on average 2.7178947368421054) internal successors, (1291), 709 states have internal predecessors, (1291), 0 states have call successors, (0), 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 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:27,723 INFO L93 Difference]: Finished difference Result 961 states and 1734 transitions. [2021-08-06 20:03:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:03:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:27,738 INFO L225 Difference]: With dead ends: 961 [2021-08-06 20:03:27,739 INFO L226 Difference]: Without dead ends: 229 [2021-08-06 20:03:27,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-06 20:03:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-08-06 20:03:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.587719298245614) internal successors, (590), 228 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 590 transitions. [2021-08-06 20:03:27,788 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 590 transitions. Word has length 23 [2021-08-06 20:03:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:27,789 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 590 transitions. [2021-08-06 20:03:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 590 transitions. [2021-08-06 20:03:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:03:27,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:27,792 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] [2021-08-06 20:03:27,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:03:27,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash -443022147, now seen corresponding path program 2 times [2021-08-06 20:03:27,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:27,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415557636] [2021-08-06 20:03:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:27,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:27,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:27,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415557636] [2021-08-06 20:03:27,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415557636] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:27,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:27,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:03:27,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887914476] [2021-08-06 20:03:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:03:27,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:03:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:27,921 INFO L87 Difference]: Start difference. First operand 229 states and 590 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:27,993 INFO L93 Difference]: Finished difference Result 936 states and 2497 transitions. [2021-08-06 20:03:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:27,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:03:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:27,996 INFO L225 Difference]: With dead ends: 936 [2021-08-06 20:03:27,996 INFO L226 Difference]: Without dead ends: 500 [2021-08-06 20:03:27,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-06 20:03:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 276. [2021-08-06 20:03:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.5054545454545454) internal successors, (689), 275 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 689 transitions. [2021-08-06 20:03:28,014 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 689 transitions. Word has length 23 [2021-08-06 20:03:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:28,015 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 689 transitions. [2021-08-06 20:03:28,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 689 transitions. [2021-08-06 20:03:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:03:28,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:28,016 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] [2021-08-06 20:03:28,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:03:28,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1888697155, now seen corresponding path program 3 times [2021-08-06 20:03:28,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:28,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808984417] [2021-08-06 20:03:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:28,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808984417] [2021-08-06 20:03:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808984417] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:28,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:28,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:03:28,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841090981] [2021-08-06 20:03:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:03:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:03:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:28,095 INFO L87 Difference]: Start difference. First operand 276 states and 689 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:28,172 INFO L93 Difference]: Finished difference Result 1207 states and 3198 transitions. [2021-08-06 20:03:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:03:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:28,175 INFO L225 Difference]: With dead ends: 1207 [2021-08-06 20:03:28,175 INFO L226 Difference]: Without dead ends: 787 [2021-08-06 20:03:28,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-08-06 20:03:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 281. [2021-08-06 20:03:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.5428571428571427) internal successors, (712), 280 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 712 transitions. [2021-08-06 20:03:28,186 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 712 transitions. Word has length 23 [2021-08-06 20:03:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:28,186 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 712 transitions. [2021-08-06 20:03:28,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 712 transitions. [2021-08-06 20:03:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:03:28,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:28,187 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] [2021-08-06 20:03:28,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:03:28,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1128293079, now seen corresponding path program 4 times [2021-08-06 20:03:28,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:28,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478532283] [2021-08-06 20:03:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:28,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478532283] [2021-08-06 20:03:28,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478532283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:28,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:28,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:03:28,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477574446] [2021-08-06 20:03:28,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:03:28,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:03:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:03:28,215 INFO L87 Difference]: Start difference. First operand 281 states and 712 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:28,228 INFO L93 Difference]: Finished difference Result 350 states and 909 transitions. [2021-08-06 20:03:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:03:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:28,229 INFO L225 Difference]: With dead ends: 350 [2021-08-06 20:03:28,229 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 20:03:28,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 20:03:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-08-06 20:03:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.413793103448276) internal successors, (560), 232 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 560 transitions. [2021-08-06 20:03:28,234 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 560 transitions. Word has length 23 [2021-08-06 20:03:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:28,235 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 560 transitions. [2021-08-06 20:03:28,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 560 transitions. [2021-08-06 20:03:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:03:28,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:28,236 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] [2021-08-06 20:03:28,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:03:28,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1795647777, now seen corresponding path program 1 times [2021-08-06 20:03:28,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:28,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915007247] [2021-08-06 20:03:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:28,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915007247] [2021-08-06 20:03:28,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915007247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:28,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928272656] [2021-08-06 20:03:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:28,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:28,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:03:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:03:28,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:28,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:28,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928272656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:28,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:28,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:03:28,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464712002] [2021-08-06 20:03:28,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:28,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:28,555 INFO L87 Difference]: Start difference. First operand 233 states and 560 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:28,606 INFO L93 Difference]: Finished difference Result 535 states and 1310 transitions. [2021-08-06 20:03:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:03:28,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:03:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:28,608 INFO L225 Difference]: With dead ends: 535 [2021-08-06 20:03:28,608 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 20:03:28,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 20:03:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 301. [2021-08-06 20:03:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.473333333333333) internal successors, (742), 300 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 742 transitions. [2021-08-06 20:03:28,621 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 742 transitions. Word has length 25 [2021-08-06 20:03:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:28,621 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 742 transitions. [2021-08-06 20:03:28,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 742 transitions. [2021-08-06 20:03:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:03:28,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:28,622 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] [2021-08-06 20:03:28,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:28,838 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 [2021-08-06 20:03:28,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1551642463, now seen corresponding path program 1 times [2021-08-06 20:03:28,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:28,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326238628] [2021-08-06 20:03:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326238628] [2021-08-06 20:03:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326238628] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:28,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:28,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:03:28,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100325647] [2021-08-06 20:03:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:03:28,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:03:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:03:28,881 INFO L87 Difference]: Start difference. First operand 301 states and 742 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:28,916 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-08-06 20:03:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:03:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:28,919 INFO L225 Difference]: With dead ends: 508 [2021-08-06 20:03:28,919 INFO L226 Difference]: Without dead ends: 508 [2021-08-06 20:03:28,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-06 20:03:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 386. [2021-08-06 20:03:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.5714285714285716) internal successors, (990), 385 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 990 transitions. [2021-08-06 20:03:28,927 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 990 transitions. Word has length 25 [2021-08-06 20:03:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:28,928 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 990 transitions. [2021-08-06 20:03:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 990 transitions. [2021-08-06 20:03:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:03:28,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:28,930 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] [2021-08-06 20:03:28,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 20:03:28,930 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash -926545313, now seen corresponding path program 1 times [2021-08-06 20:03:28,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:28,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943365473] [2021-08-06 20:03:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:28,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:28,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:28,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943365473] [2021-08-06 20:03:28,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943365473] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:28,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:28,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:03:28,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010490107] [2021-08-06 20:03:28,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:03:28,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:03:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:03:28,990 INFO L87 Difference]: Start difference. First operand 386 states and 990 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:29,020 INFO L93 Difference]: Finished difference Result 475 states and 1186 transitions. [2021-08-06 20:03:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:03:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:29,024 INFO L225 Difference]: With dead ends: 475 [2021-08-06 20:03:29,024 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 20:03:29,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 20:03:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 386. [2021-08-06 20:03:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.6) internal successors, (1001), 385 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1001 transitions. [2021-08-06 20:03:29,034 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1001 transitions. Word has length 25 [2021-08-06 20:03:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:29,034 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1001 transitions. [2021-08-06 20:03:29,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1001 transitions. [2021-08-06 20:03:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:03:29,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:29,037 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] [2021-08-06 20:03:29,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 20:03:29,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -370698401, now seen corresponding path program 2 times [2021-08-06 20:03:29,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:29,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104988136] [2021-08-06 20:03:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:29,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:29,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104988136] [2021-08-06 20:03:29,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104988136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:29,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:29,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:03:29,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954126390] [2021-08-06 20:03:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:03:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:03:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:29,118 INFO L87 Difference]: Start difference. First operand 386 states and 1001 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:29,173 INFO L93 Difference]: Finished difference Result 524 states and 1276 transitions. [2021-08-06 20:03:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:03:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:29,175 INFO L225 Difference]: With dead ends: 524 [2021-08-06 20:03:29,175 INFO L226 Difference]: Without dead ends: 494 [2021-08-06 20:03:29,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-06 20:03:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 358. [2021-08-06 20:03:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.6330532212885154) internal successors, (940), 357 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 940 transitions. [2021-08-06 20:03:29,183 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 940 transitions. Word has length 25 [2021-08-06 20:03:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:29,183 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 940 transitions. [2021-08-06 20:03:29,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 940 transitions. [2021-08-06 20:03:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:03:29,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:29,185 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] [2021-08-06 20:03:29,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 20:03:29,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 94324383, now seen corresponding path program 2 times [2021-08-06 20:03:29,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:29,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465019577] [2021-08-06 20:03:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:29,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:29,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465019577] [2021-08-06 20:03:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465019577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:29,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707370575] [2021-08-06 20:03:29,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:29,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:29,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:29,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:03:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 20:03:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:29,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:29,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:29,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707370575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:29,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:29,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 20:03:29,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123662006] [2021-08-06 20:03:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:29,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:29,444 INFO L87 Difference]: Start difference. First operand 358 states and 940 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:29,480 INFO L93 Difference]: Finished difference Result 406 states and 1046 transitions. [2021-08-06 20:03:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:03:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:03:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:29,482 INFO L225 Difference]: With dead ends: 406 [2021-08-06 20:03:29,482 INFO L226 Difference]: Without dead ends: 390 [2021-08-06 20:03:29,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-06 20:03:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 326. [2021-08-06 20:03:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.596923076923077) internal successors, (844), 325 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 844 transitions. [2021-08-06 20:03:29,488 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 844 transitions. Word has length 25 [2021-08-06 20:03:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:29,489 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 844 transitions. [2021-08-06 20:03:29,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 844 transitions. [2021-08-06 20:03:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:03:29,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:29,489 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] [2021-08-06 20:03:29,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:29,707 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,SelfDestructingSolverStorable8 [2021-08-06 20:03:29,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash 575314945, now seen corresponding path program 1 times [2021-08-06 20:03:29,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:29,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442861391] [2021-08-06 20:03:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:29,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:29,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442861391] [2021-08-06 20:03:29,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442861391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:29,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922482411] [2021-08-06 20:03:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:29,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:29,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:29,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:03:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:03:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:29,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:29,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922482411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:29,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:29,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-06 20:03:29,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429999578] [2021-08-06 20:03:29,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:29,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:29,932 INFO L87 Difference]: Start difference. First operand 326 states and 844 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:30,004 INFO L93 Difference]: Finished difference Result 473 states and 1214 transitions. [2021-08-06 20:03:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 27 [2021-08-06 20:03:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:30,006 INFO L225 Difference]: With dead ends: 473 [2021-08-06 20:03:30,006 INFO L226 Difference]: Without dead ends: 473 [2021-08-06 20:03:30,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-06 20:03:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 366. [2021-08-06 20:03:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.684931506849315) internal successors, (980), 365 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 980 transitions. [2021-08-06 20:03:30,014 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 980 transitions. Word has length 27 [2021-08-06 20:03:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:30,014 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 980 transitions. [2021-08-06 20:03:30,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 980 transitions. [2021-08-06 20:03:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:03:30,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:30,015 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] [2021-08-06 20:03:30,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:30,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:30,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash 569427363, now seen corresponding path program 1 times [2021-08-06 20:03:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:30,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532660533] [2021-08-06 20:03:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,268 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 75.0 percent of original size [2021-08-06 20:03:30,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 75.0 percent of original size [2021-08-06 20:03:30,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 84.6 percent of original size [2021-08-06 20:03:30,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 84.6 percent of original size [2021-08-06 20:03:30,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:30,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:30,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532660533] [2021-08-06 20:03:30,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532660533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:30,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318533601] [2021-08-06 20:03:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:30,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:03:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:03:30,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:30,590 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 [2021-08-06 20:03:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:03:30,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:30,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318533601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:30,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:30,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:03:30,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90277071] [2021-08-06 20:03:30,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:30,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:30,719 INFO L87 Difference]: Start difference. First operand 366 states and 980 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:30,984 INFO L93 Difference]: Finished difference Result 1137 states and 2987 transitions. [2021-08-06 20:03:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:03:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:03:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:30,987 INFO L225 Difference]: With dead ends: 1137 [2021-08-06 20:03:30,987 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:03:30,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:03:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:03:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 423. [2021-08-06 20:03:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.604265402843602) internal successors, (1099), 422 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1099 transitions. [2021-08-06 20:03:30,996 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1099 transitions. Word has length 29 [2021-08-06 20:03:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1099 transitions. [2021-08-06 20:03:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1099 transitions. [2021-08-06 20:03:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:03:30,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:30,997 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] [2021-08-06 20:03:31,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:31,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:31,214 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash -377519773, now seen corresponding path program 2 times [2021-08-06 20:03:31,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:31,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710544811] [2021-08-06 20:03:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:31,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:31,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 47.2 percent of original size [2021-08-06 20:03:31,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 47.2 percent of original size [2021-08-06 20:03:31,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 20:03:31,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 20:03:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:31,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:31,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710544811] [2021-08-06 20:03:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710544811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:31,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866505873] [2021-08-06 20:03:31,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:31,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:31,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:31,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:03:31,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:31,473 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 [2021-08-06 20:03:31,594 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 [2021-08-06 20:03:31,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:31,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:31,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866505873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:31,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:31,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:03:31,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588540797] [2021-08-06 20:03:31,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:03:31,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:03:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:03:31,644 INFO L87 Difference]: Start difference. First operand 423 states and 1099 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:31,856 INFO L93 Difference]: Finished difference Result 1122 states and 2930 transitions. [2021-08-06 20:03:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:03:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:03:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:31,859 INFO L225 Difference]: With dead ends: 1122 [2021-08-06 20:03:31,859 INFO L226 Difference]: Without dead ends: 729 [2021-08-06 20:03:31,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:03:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-08-06 20:03:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 446. [2021-08-06 20:03:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.6157303370786518) internal successors, (1164), 445 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1164 transitions. [2021-08-06 20:03:31,869 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1164 transitions. Word has length 29 [2021-08-06 20:03:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:31,869 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1164 transitions. [2021-08-06 20:03:31,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1164 transitions. [2021-08-06 20:03:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:03:31,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:31,870 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] [2021-08-06 20:03:31,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:32,085 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,SelfDestructingSolverStorable11 [2021-08-06 20:03:32,086 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1443745437, now seen corresponding path program 3 times [2021-08-06 20:03:32,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:32,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191638757] [2021-08-06 20:03:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:32,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:32,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 20:03:32,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 20:03:32,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:03:32,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:03:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:32,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191638757] [2021-08-06 20:03:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191638757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747884116] [2021-08-06 20:03:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:32,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:32,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:32,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:03:32,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:03:32,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:32,432 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 [2021-08-06 20:03:32,544 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 [2021-08-06 20:03:32,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:32,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:32,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747884116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:32,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:32,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:03:32,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799384539] [2021-08-06 20:03:32,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:32,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:32,593 INFO L87 Difference]: Start difference. First operand 446 states and 1164 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:32,876 INFO L93 Difference]: Finished difference Result 1051 states and 2747 transitions. [2021-08-06 20:03:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:03:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 29 [2021-08-06 20:03:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:32,879 INFO L225 Difference]: With dead ends: 1051 [2021-08-06 20:03:32,879 INFO L226 Difference]: Without dead ends: 465 [2021-08-06 20:03:32,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-08-06 20:03:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 286. [2021-08-06 20:03:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4947368421052634) internal successors, (711), 285 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 711 transitions. [2021-08-06 20:03:32,885 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 711 transitions. Word has length 29 [2021-08-06 20:03:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:32,885 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 711 transitions. [2021-08-06 20:03:32,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 711 transitions. [2021-08-06 20:03:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:03:32,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:32,886 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] [2021-08-06 20:03:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:33,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:33,104 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -793571643, now seen corresponding path program 4 times [2021-08-06 20:03:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:33,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249377099] [2021-08-06 20:03:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:33,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:33,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:33,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249377099] [2021-08-06 20:03:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249377099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335752025] [2021-08-06 20:03:33,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:33,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:33,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:03:33,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:33,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:33,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:33,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335752025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:33,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:03:33,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853513352] [2021-08-06 20:03:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:33,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:33,379 INFO L87 Difference]: Start difference. First operand 286 states and 711 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:33,439 INFO L93 Difference]: Finished difference Result 656 states and 1649 transitions. [2021-08-06 20:03:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:33,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:03:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:33,442 INFO L225 Difference]: With dead ends: 656 [2021-08-06 20:03:33,442 INFO L226 Difference]: Without dead ends: 650 [2021-08-06 20:03:33,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-08-06 20:03:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 460. [2021-08-06 20:03:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.7799564270152506) internal successors, (1276), 459 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1276 transitions. [2021-08-06 20:03:33,451 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1276 transitions. Word has length 31 [2021-08-06 20:03:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:33,451 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1276 transitions. [2021-08-06 20:03:33,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1276 transitions. [2021-08-06 20:03:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:03:33,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:33,452 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] [2021-08-06 20:03:33,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:33,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:33,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1247534789, now seen corresponding path program 5 times [2021-08-06 20:03:33,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:33,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344116287] [2021-08-06 20:03:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:33,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:33,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:33,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344116287] [2021-08-06 20:03:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344116287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522968110] [2021-08-06 20:03:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:33,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:33,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:33,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:03:33,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:03:33,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:33,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:33,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:33,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522968110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:33,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:03:33,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051288612] [2021-08-06 20:03:33,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:33,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:33,963 INFO L87 Difference]: Start difference. First operand 460 states and 1276 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:34,027 INFO L93 Difference]: Finished difference Result 652 states and 1672 transitions. [2021-08-06 20:03:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:34,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:03:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:34,029 INFO L225 Difference]: With dead ends: 652 [2021-08-06 20:03:34,029 INFO L226 Difference]: Without dead ends: 652 [2021-08-06 20:03:34,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-06 20:03:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 464. [2021-08-06 20:03:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.7840172786177106) internal successors, (1289), 463 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1289 transitions. [2021-08-06 20:03:34,038 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1289 transitions. Word has length 31 [2021-08-06 20:03:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:34,038 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1289 transitions. [2021-08-06 20:03:34,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1289 transitions. [2021-08-06 20:03:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:03:34,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:34,039 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] [2021-08-06 20:03:34,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:34,256 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,SelfDestructingSolverStorable14 [2021-08-06 20:03:34,256 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -650819455, now seen corresponding path program 6 times [2021-08-06 20:03:34,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:34,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652086555] [2021-08-06 20:03:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:34,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:34,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:34,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652086555] [2021-08-06 20:03:34,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652086555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210610772] [2021-08-06 20:03:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:34,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:34,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:34,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:03:34,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:03:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:03:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:34,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210610772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:34,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 20:03:34,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642692826] [2021-08-06 20:03:34,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:03:34,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:03:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:34,600 INFO L87 Difference]: Start difference. First operand 464 states and 1289 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:35,018 INFO L93 Difference]: Finished difference Result 1780 states and 5017 transitions. [2021-08-06 20:03:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:03:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 31 [2021-08-06 20:03:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:35,025 INFO L225 Difference]: With dead ends: 1780 [2021-08-06 20:03:35,025 INFO L226 Difference]: Without dead ends: 1776 [2021-08-06 20:03:35,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:03:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-08-06 20:03:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 933. [2021-08-06 20:03:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 3.274678111587983) internal successors, (3052), 932 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 3052 transitions. [2021-08-06 20:03:35,050 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 3052 transitions. Word has length 31 [2021-08-06 20:03:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:35,050 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 3052 transitions. [2021-08-06 20:03:35,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 3052 transitions. [2021-08-06 20:03:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:03:35,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:35,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:35,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:35,285 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,SelfDestructingSolverStorable15 [2021-08-06 20:03:35,285 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash -476523229, now seen corresponding path program 7 times [2021-08-06 20:03:35,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:35,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924512413] [2021-08-06 20:03:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:35,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:35,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:35,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924512413] [2021-08-06 20:03:35,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924512413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36898861] [2021-08-06 20:03:35,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:35,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:35,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:35,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:03:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:35,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:35,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:03:35,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36898861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:35,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:03:35,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722262097] [2021-08-06 20:03:35,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:35,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:35,582 INFO L87 Difference]: Start difference. First operand 933 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:35,638 INFO L93 Difference]: Finished difference Result 1262 states and 3812 transitions. [2021-08-06 20:03:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:35,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:03:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:35,643 INFO L225 Difference]: With dead ends: 1262 [2021-08-06 20:03:35,643 INFO L226 Difference]: Without dead ends: 1262 [2021-08-06 20:03:35,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-08-06 20:03:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 926. [2021-08-06 20:03:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.2421621621621624) internal successors, (2999), 925 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2999 transitions. [2021-08-06 20:03:35,664 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2999 transitions. Word has length 33 [2021-08-06 20:03:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:35,664 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 2999 transitions. [2021-08-06 20:03:35,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2999 transitions. [2021-08-06 20:03:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:03:35,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:35,666 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] [2021-08-06 20:03:35,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:35,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 20:03:35,877 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1789469323, now seen corresponding path program 8 times [2021-08-06 20:03:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:35,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647541783] [2021-08-06 20:03:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:35,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:35,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:35,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647541783] [2021-08-06 20:03:35,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647541783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377953101] [2021-08-06 20:03:35,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:35,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:35,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:35,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:03:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:36,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:36,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:36,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377953101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:36,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:36,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 20:03:36,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111382546] [2021-08-06 20:03:36,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:36,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:36,225 INFO L87 Difference]: Start difference. First operand 926 states and 2999 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:36,291 INFO L93 Difference]: Finished difference Result 1317 states and 4006 transitions. [2021-08-06 20:03:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:03:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:36,296 INFO L225 Difference]: With dead ends: 1317 [2021-08-06 20:03:36,296 INFO L226 Difference]: Without dead ends: 1317 [2021-08-06 20:03:36,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-08-06 20:03:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1047. [2021-08-06 20:03:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.2237093690248564) internal successors, (3372), 1046 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3372 transitions. [2021-08-06 20:03:36,315 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3372 transitions. Word has length 33 [2021-08-06 20:03:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3372 transitions. [2021-08-06 20:03:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3372 transitions. [2021-08-06 20:03:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:03:36,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:36,317 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] [2021-08-06 20:03:36,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:36,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:03:36,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2064088567, now seen corresponding path program 9 times [2021-08-06 20:03:36,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:36,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813028680] [2021-08-06 20:03:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:36,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:36,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 52.0 percent of original size [2021-08-06 20:03:36,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 52.0 percent of original size [2021-08-06 20:03:36,648 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 72.4 percent of original size [2021-08-06 20:03:36,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 72.4 percent of original size [2021-08-06 20:03:36,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 72.4 percent of original size [2021-08-06 20:03:36,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 72.4 percent of original size [2021-08-06 20:03:36,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:36,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:36,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:36,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813028680] [2021-08-06 20:03:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813028680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:36,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391110728] [2021-08-06 20:03:36,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:36,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:36,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:36,721 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:36,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:03:36,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:03:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:03:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:37,118 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-08-06 20:03:37,119 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 26 treesize of output 26 [2021-08-06 20:03:37,178 INFO L354 Elim1Store]: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:03:37,179 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 28 treesize of output 44 [2021-08-06 20:03:37,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:03:37,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:37,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:37,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391110728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:37,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2021-08-06 20:03:37,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935194270] [2021-08-06 20:03:37,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:03:37,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:03:37,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:03:37,416 INFO L87 Difference]: Start difference. First operand 1047 states and 3372 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2021-08-06 20:03:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:38,268 INFO L93 Difference]: Finished difference Result 2625 states and 8212 transitions. [2021-08-06 20:03:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:03:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 35 [2021-08-06 20:03:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:38,273 INFO L225 Difference]: With dead ends: 2625 [2021-08-06 20:03:38,273 INFO L226 Difference]: Without dead ends: 1124 [2021-08-06 20:03:38,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:03:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-08-06 20:03:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1073. [2021-08-06 20:03:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.183768656716418) internal successors, (3413), 1072 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3413 transitions. [2021-08-06 20:03:38,291 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3413 transitions. Word has length 35 [2021-08-06 20:03:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:38,291 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3413 transitions. [2021-08-06 20:03:38,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2021-08-06 20:03:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3413 transitions. [2021-08-06 20:03:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:03:38,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:38,294 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] [2021-08-06 20:03:38,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:38,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:38,513 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash 487542217, now seen corresponding path program 10 times [2021-08-06 20:03:38,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:38,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317424221] [2021-08-06 20:03:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:38,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:38,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 82.5 percent of original size [2021-08-06 20:03:38,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 82.5 percent of original size [2021-08-06 20:03:38,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 20:03:38,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 20:03:38,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:03:38,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:03:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:38,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317424221] [2021-08-06 20:03:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317424221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:38,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610250582] [2021-08-06 20:03:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:38,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:38,694 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:38,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:03:38,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:03:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:39,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-08-06 20:03:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2021-08-06 20:03:39,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:39,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:39,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610250582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:39,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:39,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-06 20:03:39,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383575367] [2021-08-06 20:03:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:03:39,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:03:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:03:39,537 INFO L87 Difference]: Start difference. First operand 1073 states and 3413 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:40,183 INFO L93 Difference]: Finished difference Result 2548 states and 7690 transitions. [2021-08-06 20:03:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:03:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:03:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:40,188 INFO L225 Difference]: With dead ends: 2548 [2021-08-06 20:03:40,188 INFO L226 Difference]: Without dead ends: 1185 [2021-08-06 20:03:40,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:03:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-08-06 20:03:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1102. [2021-08-06 20:03:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.1416893732970026) internal successors, (3459), 1101 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3459 transitions. [2021-08-06 20:03:40,206 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3459 transitions. Word has length 35 [2021-08-06 20:03:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:40,206 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 3459 transitions. [2021-08-06 20:03:40,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3459 transitions. [2021-08-06 20:03:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:03:40,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:40,208 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-06 20:03:40,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:40,424 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,SelfDestructingSolverStorable19 [2021-08-06 20:03:40,425 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -468186709, now seen corresponding path program 11 times [2021-08-06 20:03:40,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:40,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159411309] [2021-08-06 20:03:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:40,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:40,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:40,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159411309] [2021-08-06 20:03:40,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159411309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:40,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879207574] [2021-08-06 20:03:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:40,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:40,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:40,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:03:40,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:03:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:40,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:03:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879207574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:40,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:40,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 20:03:40,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122060734] [2021-08-06 20:03:40,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:03:40,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:03:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:03:40,894 INFO L87 Difference]: Start difference. First operand 1102 states and 3459 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-08-06 20:03:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:41,710 INFO L93 Difference]: Finished difference Result 3543 states and 10888 transitions. [2021-08-06 20:03:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:03:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 37 [2021-08-06 20:03:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:41,725 INFO L225 Difference]: With dead ends: 3543 [2021-08-06 20:03:41,725 INFO L226 Difference]: Without dead ends: 3533 [2021-08-06 20:03:41,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=941, Invalid=3091, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:03:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-08-06 20:03:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1724. [2021-08-06 20:03:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3081834010446896) internal successors, (5700), 1723 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5700 transitions. [2021-08-06 20:03:41,770 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5700 transitions. Word has length 37 [2021-08-06 20:03:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:41,771 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 5700 transitions. [2021-08-06 20:03:41,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-08-06 20:03:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5700 transitions. [2021-08-06 20:03:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:03:41,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:41,774 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-06 20:03:41,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:41,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:41,992 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:41,992 INFO L82 PathProgramCache]: Analyzing trace with hash -752526387, now seen corresponding path program 12 times [2021-08-06 20:03:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:41,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085305469] [2021-08-06 20:03:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:41,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:42,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:42,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085305469] [2021-08-06 20:03:42,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085305469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:42,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375667397] [2021-08-06 20:03:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:42,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:42,039 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:03:42,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:03:42,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:03:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:42,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:42,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:42,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375667397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:42,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:42,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-06 20:03:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703422367] [2021-08-06 20:03:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:03:42,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:03:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:03:42,482 INFO L87 Difference]: Start difference. First operand 1724 states and 5700 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-08-06 20:03:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:43,637 INFO L93 Difference]: Finished difference Result 11145 states and 35026 transitions. [2021-08-06 20:03:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 20:03:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 39 [2021-08-06 20:03:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:43,667 INFO L225 Difference]: With dead ends: 11145 [2021-08-06 20:03:43,668 INFO L226 Difference]: Without dead ends: 9803 [2021-08-06 20:03:43,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 687.4ms TimeCoverageRelationStatistics Valid=1553, Invalid=6279, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 20:03:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-08-06 20:03:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 5348. [2021-08-06 20:03:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 3.5829437067514496) internal successors, (19158), 5347 states have internal predecessors, (19158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 19158 transitions. [2021-08-06 20:03:43,923 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 19158 transitions. Word has length 39 [2021-08-06 20:03:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:43,924 INFO L470 AbstractCegarLoop]: Abstraction has 5348 states and 19158 transitions. [2021-08-06 20:03:43,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-08-06 20:03:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 19158 transitions. [2021-08-06 20:03:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:03:43,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:43,937 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-06 20:03:43,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:44,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1742688269, now seen corresponding path program 13 times [2021-08-06 20:03:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:44,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991074560] [2021-08-06 20:03:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:44,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:44,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991074560] [2021-08-06 20:03:44,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991074560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965558909] [2021-08-06 20:03:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:44,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:44,237 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:44,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:03:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:44,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:44,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965558909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:44,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:44,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:03:44,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658081068] [2021-08-06 20:03:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:44,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:44,677 INFO L87 Difference]: Start difference. First operand 5348 states and 19158 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) [2021-08-06 20:03:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:44,769 INFO L93 Difference]: Finished difference Result 7995 states and 26361 transitions. [2021-08-06 20:03:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:03:44,771 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 39 [2021-08-06 20:03:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:44,792 INFO L225 Difference]: With dead ends: 7995 [2021-08-06 20:03:44,792 INFO L226 Difference]: Without dead ends: 7995 [2021-08-06 20:03:44,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-08-06 20:03:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5512. [2021-08-06 20:03:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5512 states, 5511 states have (on average 3.6022500453638178) internal successors, (19852), 5511 states have internal predecessors, (19852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 19852 transitions. [2021-08-06 20:03:45,008 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 19852 transitions. Word has length 39 [2021-08-06 20:03:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 5512 states and 19852 transitions. [2021-08-06 20:03:45,009 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) [2021-08-06 20:03:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 19852 transitions. [2021-08-06 20:03:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:03:45,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:45,022 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-06 20:03:45,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:45,228 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,SelfDestructingSolverStorable22 [2021-08-06 20:03:45,229 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash 477132933, now seen corresponding path program 14 times [2021-08-06 20:03:45,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:45,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239874883] [2021-08-06 20:03:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:45,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 20:03:45,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:45,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239874883] [2021-08-06 20:03:45,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239874883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:45,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411082795] [2021-08-06 20:03:45,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:45,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:45,268 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:45,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:03:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:45,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:45,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 20:03:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411082795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:45,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:45,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:03:45,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581916574] [2021-08-06 20:03:45,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:45,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:45,727 INFO L87 Difference]: Start difference. First operand 5512 states and 19852 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) [2021-08-06 20:03:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:45,897 INFO L93 Difference]: Finished difference Result 9413 states and 31995 transitions. [2021-08-06 20:03:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:03:45,897 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 39 [2021-08-06 20:03:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:45,922 INFO L225 Difference]: With dead ends: 9413 [2021-08-06 20:03:45,923 INFO L226 Difference]: Without dead ends: 9413 [2021-08-06 20:03:45,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-08-06 20:03:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 6684. [2021-08-06 20:03:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6684 states, 6683 states have (on average 3.658985485560377) internal successors, (24453), 6683 states have internal predecessors, (24453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6684 states to 6684 states and 24453 transitions. [2021-08-06 20:03:46,120 INFO L78 Accepts]: Start accepts. Automaton has 6684 states and 24453 transitions. Word has length 39 [2021-08-06 20:03:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:46,120 INFO L470 AbstractCegarLoop]: Abstraction has 6684 states and 24453 transitions. [2021-08-06 20:03:46,120 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) [2021-08-06 20:03:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6684 states and 24453 transitions. [2021-08-06 20:03:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:03:46,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:46,138 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-06 20:03:46,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:46,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:46,357 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -200422591, now seen corresponding path program 15 times [2021-08-06 20:03:46,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:46,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107410873] [2021-08-06 20:03:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:46,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:46,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:46,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107410873] [2021-08-06 20:03:46,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107410873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:46,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117811793] [2021-08-06 20:03:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:46,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:46,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:46,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:03:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:03:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:46,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:03:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:46,831 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 19 treesize of output 16 [2021-08-06 20:03:47,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:03:47,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-08-06 20:03:47,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:03:47,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:03:47,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 20:03:47,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 20:03:47,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:47,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:03:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:47,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117811793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:47,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:47,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 17 [2021-08-06 20:03:47,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965272877] [2021-08-06 20:03:47,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:03:47,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:03:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:03:47,427 INFO L87 Difference]: Start difference. First operand 6684 states and 24453 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:50,971 INFO L93 Difference]: Finished difference Result 23073 states and 77376 transitions. [2021-08-06 20:03:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 20:03:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:03:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:51,045 INFO L225 Difference]: With dead ends: 23073 [2021-08-06 20:03:51,045 INFO L226 Difference]: Without dead ends: 22665 [2021-08-06 20:03:51,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3458 ImplicationChecksByTransitivity, 2488.1ms TimeCoverageRelationStatistics Valid=1676, Invalid=8424, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 20:03:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22665 states. [2021-08-06 20:03:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22665 to 8299. [2021-08-06 20:03:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8298 states have (on average 3.934924078091106) internal successors, (32652), 8298 states have internal predecessors, (32652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 32652 transitions. [2021-08-06 20:03:51,493 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 32652 transitions. Word has length 39 [2021-08-06 20:03:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:51,494 INFO L470 AbstractCegarLoop]: Abstraction has 8299 states and 32652 transitions. [2021-08-06 20:03:51,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 32652 transitions. [2021-08-06 20:03:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:03:51,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:51,516 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-06 20:03:51,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:51,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:51,730 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -205964849, now seen corresponding path program 16 times [2021-08-06 20:03:51,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:51,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74607800] [2021-08-06 20:03:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:51,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:51,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:51,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74607800] [2021-08-06 20:03:51,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74607800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:51,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304021241] [2021-08-06 20:03:51,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:51,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:51,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:51,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:03:52,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:52,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:52,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:52,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:52,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:52,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:52,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304021241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:52,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:52,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 20:03:52,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625432571] [2021-08-06 20:03:52,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:52,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:52,341 INFO L87 Difference]: Start difference. First operand 8299 states and 32652 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:52,585 INFO L93 Difference]: Finished difference Result 13342 states and 49224 transitions. [2021-08-06 20:03:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:03:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:03:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:52,627 INFO L225 Difference]: With dead ends: 13342 [2021-08-06 20:03:52,627 INFO L226 Difference]: Without dead ends: 13342 [2021-08-06 20:03:52,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:03:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13342 states. [2021-08-06 20:03:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13342 to 9675. [2021-08-06 20:03:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9675 states, 9674 states have (on average 3.9240231548480464) internal successors, (37961), 9674 states have internal predecessors, (37961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 37961 transitions. [2021-08-06 20:03:52,934 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 37961 transitions. Word has length 39 [2021-08-06 20:03:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:52,935 INFO L470 AbstractCegarLoop]: Abstraction has 9675 states and 37961 transitions. [2021-08-06 20:03:52,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 37961 transitions. [2021-08-06 20:03:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:03:52,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:52,962 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:52,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:53,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,177 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1377527313, now seen corresponding path program 17 times [2021-08-06 20:03:53,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:53,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322549772] [2021-08-06 20:03:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:53,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:53,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 80.0 percent of original size [2021-08-06 20:03:53,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 80.0 percent of original size [2021-08-06 20:03:53,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 26.3 percent of original size [2021-08-06 20:03:53,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 26.3 percent of original size [2021-08-06 20:03:53,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 59.5 percent of original size [2021-08-06 20:03:53,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 59.5 percent of original size [2021-08-06 20:03:53,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 44.7 percent of original size [2021-08-06 20:03:53,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 44.7 percent of original size [2021-08-06 20:03:53,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:53,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.1 percent of original size [2021-08-06 20:03:53,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 91, result has 18.8 percent of original size [2021-08-06 20:03:53,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 91, result has 18.8 percent of original size [2021-08-06 20:03:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 20:03:53,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322549772] [2021-08-06 20:03:53,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322549772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140766639] [2021-08-06 20:03:53,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:53,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:53,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:03:53,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:03:53,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 20:03:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:54,206 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 [2021-08-06 20:03:54,261 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-06 20:03:54,261 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 41 treesize of output 39 [2021-08-06 20:03:54,309 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-06 20:03:54,309 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 [2021-08-06 20:03:54,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:03:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-06 20:03:54,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:54,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:03:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-06 20:03:54,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140766639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:54,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:54,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:03:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95503634] [2021-08-06 20:03:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:03:54,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:03:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:03:54,559 INFO L87 Difference]: Start difference. First operand 9675 states and 37961 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:54,896 INFO L93 Difference]: Finished difference Result 20041 states and 76520 transitions. [2021-08-06 20:03:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:03:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:03:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:54,913 INFO L225 Difference]: With dead ends: 20041 [2021-08-06 20:03:54,913 INFO L226 Difference]: Without dead ends: 5288 [2021-08-06 20:03:54,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:03:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-08-06 20:03:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5288. [2021-08-06 20:03:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 3.7508984301115946) internal successors, (19831), 5287 states have internal predecessors, (19831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 19831 transitions. [2021-08-06 20:03:55,027 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 19831 transitions. Word has length 41 [2021-08-06 20:03:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:55,027 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 19831 transitions. [2021-08-06 20:03:55,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 19831 transitions. [2021-08-06 20:03:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:03:55,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:55,041 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:55,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:55,264 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,SelfDestructingSolverStorable26 [2021-08-06 20:03:55,265 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:55,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1982032849, now seen corresponding path program 18 times [2021-08-06 20:03:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:55,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601802117] [2021-08-06 20:03:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:55,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:55,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:55,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601802117] [2021-08-06 20:03:55,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601802117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:55,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414783395] [2021-08-06 20:03:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:55,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:55,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:55,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:55,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:03:55,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:03:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:03:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:03:56,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414783395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:56,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:56,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 20:03:56,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306397542] [2021-08-06 20:03:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:03:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:03:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:03:56,184 INFO L87 Difference]: Start difference. First operand 5288 states and 19831 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:58,323 INFO L93 Difference]: Finished difference Result 21098 states and 75239 transitions. [2021-08-06 20:03:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-06 20:03:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:03:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:58,497 INFO L225 Difference]: With dead ends: 21098 [2021-08-06 20:03:58,497 INFO L226 Difference]: Without dead ends: 19840 [2021-08-06 20:03:58,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5269 ImplicationChecksByTransitivity, 1444.4ms TimeCoverageRelationStatistics Valid=2804, Invalid=10078, Unknown=0, NotChecked=0, Total=12882 [2021-08-06 20:03:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-08-06 20:03:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 9989. [2021-08-06 20:03:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9989 states, 9988 states have (on average 3.8734481377653185) internal successors, (38688), 9988 states have internal predecessors, (38688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9989 states to 9989 states and 38688 transitions. [2021-08-06 20:03:58,852 INFO L78 Accepts]: Start accepts. Automaton has 9989 states and 38688 transitions. Word has length 43 [2021-08-06 20:03:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:58,852 INFO L470 AbstractCegarLoop]: Abstraction has 9989 states and 38688 transitions. [2021-08-06 20:03:58,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9989 states and 38688 transitions. [2021-08-06 20:03:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:03:58,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:58,877 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:58,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:59,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:03:59,101 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash 259011699, now seen corresponding path program 19 times [2021-08-06 20:03:59,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:59,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153223195] [2021-08-06 20:03:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:59,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:03:59,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:59,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153223195] [2021-08-06 20:03:59,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153223195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:59,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599715358] [2021-08-06 20:03:59,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:59,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:59,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:59,157 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:59,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:03:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:59,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:03:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:59,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:59,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:03:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599715358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:59,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:59,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:03:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982119915] [2021-08-06 20:03:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:59,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:59,797 INFO L87 Difference]: Start difference. First operand 9989 states and 38688 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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) [2021-08-06 20:04:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:00,022 INFO L93 Difference]: Finished difference Result 17595 states and 64469 transitions. [2021-08-06 20:04:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:04:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 45 [2021-08-06 20:04:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:00,081 INFO L225 Difference]: With dead ends: 17595 [2021-08-06 20:04:00,081 INFO L226 Difference]: Without dead ends: 17595 [2021-08-06 20:04:00,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:04:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17595 states. [2021-08-06 20:04:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17595 to 13351. [2021-08-06 20:04:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13351 states, 13350 states have (on average 3.9828464419475655) internal successors, (53171), 13350 states have internal predecessors, (53171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13351 states to 13351 states and 53171 transitions. [2021-08-06 20:04:00,581 INFO L78 Accepts]: Start accepts. Automaton has 13351 states and 53171 transitions. Word has length 45 [2021-08-06 20:04:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:00,582 INFO L470 AbstractCegarLoop]: Abstraction has 13351 states and 53171 transitions. [2021-08-06 20:04:00,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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) [2021-08-06 20:04:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 13351 states and 53171 transitions. [2021-08-06 20:04:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:00,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:00,614 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:00,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:00,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:04:00,838 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash 617985771, now seen corresponding path program 20 times [2021-08-06 20:04:00,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:00,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678832486] [2021-08-06 20:04:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:00,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:04:00,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:00,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678832486] [2021-08-06 20:04:00,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678832486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:00,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179613582] [2021-08-06 20:04:00,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:00,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:00,894 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:00,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:04:01,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:01,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:01,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:01,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-06 20:04:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179613582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:01,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:01,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-06 20:04:01,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067290250] [2021-08-06 20:04:01,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:04:01,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:04:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:04:01,525 INFO L87 Difference]: Start difference. First operand 13351 states and 53171 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:01,719 INFO L93 Difference]: Finished difference Result 16352 states and 60358 transitions. [2021-08-06 20:04:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:04:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 45 [2021-08-06 20:04:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:01,773 INFO L225 Difference]: With dead ends: 16352 [2021-08-06 20:04:01,773 INFO L226 Difference]: Without dead ends: 16350 [2021-08-06 20:04:01,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:04:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16350 states. [2021-08-06 20:04:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16350 to 13291. [2021-08-06 20:04:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 3.979533483822423) internal successors, (52888), 13290 states have internal predecessors, (52888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 52888 transitions. [2021-08-06 20:04:02,249 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 52888 transitions. Word has length 45 [2021-08-06 20:04:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:02,249 INFO L470 AbstractCegarLoop]: Abstraction has 13291 states and 52888 transitions. [2021-08-06 20:04:02,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 52888 transitions. [2021-08-06 20:04:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:02,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:02,280 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:02,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:02,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:02,501 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:02,501 INFO L82 PathProgramCache]: Analyzing trace with hash -394126545, now seen corresponding path program 21 times [2021-08-06 20:04:02,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:02,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901308618] [2021-08-06 20:04:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:02,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:04:02,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:02,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901308618] [2021-08-06 20:04:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901308618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:02,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19684319] [2021-08-06 20:04:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:02,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:02,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:04:03,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:04:03,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:04:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:03,253 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:04:03,253 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 29 treesize of output 41 [2021-08-06 20:04:03,469 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-08-06 20:04:03,469 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 32 treesize of output 44 [2021-08-06 20:04:03,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:04:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2021-08-06 20:04:03,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:04:03,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:04:04,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:04:04,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 20:04:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 20:04:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19684319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:04,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 20 [2021-08-06 20:04:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850194936] [2021-08-06 20:04:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:04:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:04:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:04:04,101 INFO L87 Difference]: Start difference. First operand 13291 states and 52888 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:06,506 INFO L93 Difference]: Finished difference Result 21212 states and 76262 transitions. [2021-08-06 20:04:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:04:06,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:06,575 INFO L225 Difference]: With dead ends: 21212 [2021-08-06 20:04:06,575 INFO L226 Difference]: Without dead ends: 21108 [2021-08-06 20:04:06,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1522.0ms TimeCoverageRelationStatistics Valid=638, Invalid=3918, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:04:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21108 states. [2021-08-06 20:04:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21108 to 13827. [2021-08-06 20:04:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13827 states, 13826 states have (on average 3.9890062201649066) internal successors, (55152), 13826 states have internal predecessors, (55152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13827 states to 13827 states and 55152 transitions. [2021-08-06 20:04:07,204 INFO L78 Accepts]: Start accepts. Automaton has 13827 states and 55152 transitions. Word has length 45 [2021-08-06 20:04:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:07,204 INFO L470 AbstractCegarLoop]: Abstraction has 13827 states and 55152 transitions. [2021-08-06 20:04:07,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13827 states and 55152 transitions. [2021-08-06 20:04:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:07,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:07,240 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:07,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:07,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:07,463 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash -352691225, now seen corresponding path program 22 times [2021-08-06 20:04:07,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:07,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72713904] [2021-08-06 20:04:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:07,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-06 20:04:07,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:07,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72713904] [2021-08-06 20:04:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72713904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:07,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345906522] [2021-08-06 20:04:07,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:04:07,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:07,544 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:07,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:04:08,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:04:08,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:08,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:08,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 20:04:08,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345906522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:08,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:08,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-06 20:04:08,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455137158] [2021-08-06 20:04:08,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:04:08,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:04:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:04:08,258 INFO L87 Difference]: Start difference. First operand 13827 states and 55152 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:08,438 INFO L93 Difference]: Finished difference Result 15522 states and 58875 transitions. [2021-08-06 20:04:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:04:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:08,492 INFO L225 Difference]: With dead ends: 15522 [2021-08-06 20:04:08,493 INFO L226 Difference]: Without dead ends: 15520 [2021-08-06 20:04:08,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:04:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15520 states. [2021-08-06 20:04:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15520 to 13827. [2021-08-06 20:04:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13827 states, 13826 states have (on average 3.9888615651670767) internal successors, (55150), 13826 states have internal predecessors, (55150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13827 states to 13827 states and 55150 transitions. [2021-08-06 20:04:08,822 INFO L78 Accepts]: Start accepts. Automaton has 13827 states and 55150 transitions. Word has length 45 [2021-08-06 20:04:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:08,822 INFO L470 AbstractCegarLoop]: Abstraction has 13827 states and 55150 transitions. [2021-08-06 20:04:08,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13827 states and 55150 transitions. [2021-08-06 20:04:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:08,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:08,888 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:08,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:09,089 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,SelfDestructingSolverStorable31 [2021-08-06 20:04:09,089 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1996824789, now seen corresponding path program 23 times [2021-08-06 20:04:09,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:09,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666140634] [2021-08-06 20:04:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:09,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:04:09,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:09,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666140634] [2021-08-06 20:04:09,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666140634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:09,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006686982] [2021-08-06 20:04:09,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:04:09,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:09,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:09,157 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:09,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:04:09,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:04:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:04:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:09,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:09,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:04:09,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006686982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:09,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:09,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 20:04:09,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870779331] [2021-08-06 20:04:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:04:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:04:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:04:09,932 INFO L87 Difference]: Start difference. First operand 13827 states and 55150 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:10,242 INFO L93 Difference]: Finished difference Result 28647 states and 113100 transitions. [2021-08-06 20:04:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:04:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:10,347 INFO L225 Difference]: With dead ends: 28647 [2021-08-06 20:04:10,347 INFO L226 Difference]: Without dead ends: 27573 [2021-08-06 20:04:10,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:04:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27573 states. [2021-08-06 20:04:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27573 to 17107. [2021-08-06 20:04:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17107 states, 17106 states have (on average 4.010405705600374) internal successors, (68602), 17106 states have internal predecessors, (68602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17107 states to 17107 states and 68602 transitions. [2021-08-06 20:04:10,840 INFO L78 Accepts]: Start accepts. Automaton has 17107 states and 68602 transitions. Word has length 45 [2021-08-06 20:04:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:10,840 INFO L470 AbstractCegarLoop]: Abstraction has 17107 states and 68602 transitions. [2021-08-06 20:04:10,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 17107 states and 68602 transitions. [2021-08-06 20:04:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:10,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:10,879 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:10,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:11,094 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,SelfDestructingSolverStorable32 [2021-08-06 20:04:11,094 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1867693969, now seen corresponding path program 24 times [2021-08-06 20:04:11,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:11,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015948448] [2021-08-06 20:04:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:11,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:11,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:11,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015948448] [2021-08-06 20:04:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015948448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:11,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445212800] [2021-08-06 20:04:11,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:11,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:11,202 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:11,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:04:11,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:04:11,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:11,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:11,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:11,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 20:04:11,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445212800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:11,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:11,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-08-06 20:04:11,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429206379] [2021-08-06 20:04:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:04:11,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:04:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:04:11,950 INFO L87 Difference]: Start difference. First operand 17107 states and 68602 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:12,325 INFO L93 Difference]: Finished difference Result 32424 states and 122203 transitions. [2021-08-06 20:04:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:04:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 45 [2021-08-06 20:04:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:12,437 INFO L225 Difference]: With dead ends: 32424 [2021-08-06 20:04:12,438 INFO L226 Difference]: Without dead ends: 32424 [2021-08-06 20:04:12,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:04:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32424 states. [2021-08-06 20:04:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32424 to 23770. [2021-08-06 20:04:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23770 states, 23769 states have (on average 4.098657915772645) internal successors, (97421), 23769 states have internal predecessors, (97421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23770 states to 23770 states and 97421 transitions. [2021-08-06 20:04:13,186 INFO L78 Accepts]: Start accepts. Automaton has 23770 states and 97421 transitions. Word has length 45 [2021-08-06 20:04:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 23770 states and 97421 transitions. [2021-08-06 20:04:13,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 23770 states and 97421 transitions. [2021-08-06 20:04:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:13,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:13,233 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:13,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:13,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:13,451 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 351655723, now seen corresponding path program 25 times [2021-08-06 20:04:13,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:13,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600269432] [2021-08-06 20:04:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:13,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:13,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:13,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600269432] [2021-08-06 20:04:13,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600269432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:13,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343417693] [2021-08-06 20:04:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:04:13,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:13,540 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:13,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:04:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:14,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:14,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 20:04:14,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343417693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:14,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:14,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2021-08-06 20:04:14,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509540713] [2021-08-06 20:04:14,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:04:14,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:04:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:04:14,236 INFO L87 Difference]: Start difference. First operand 23770 states and 97421 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:14,720 INFO L93 Difference]: Finished difference Result 41419 states and 158883 transitions. [2021-08-06 20:04:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:04:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:14,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:14,877 INFO L225 Difference]: With dead ends: 41419 [2021-08-06 20:04:14,878 INFO L226 Difference]: Without dead ends: 41419 [2021-08-06 20:04:14,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:04:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-08-06 20:04:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 32138. [2021-08-06 20:04:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32138 states, 32137 states have (on average 4.151912126209665) internal successors, (133430), 32137 states have internal predecessors, (133430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32138 states to 32138 states and 133430 transitions. [2021-08-06 20:04:15,892 INFO L78 Accepts]: Start accepts. Automaton has 32138 states and 133430 transitions. Word has length 45 [2021-08-06 20:04:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 32138 states and 133430 transitions. [2021-08-06 20:04:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32138 states and 133430 transitions. [2021-08-06 20:04:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:15,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:15,965 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:15,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:16,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:16,182 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1220453475, now seen corresponding path program 26 times [2021-08-06 20:04:16,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:16,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397785202] [2021-08-06 20:04:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:16,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:16,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:16,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397785202] [2021-08-06 20:04:16,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397785202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:16,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158431721] [2021-08-06 20:04:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:16,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:16,282 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:16,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:04:16,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:17,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:17,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 20:04:17,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158431721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:17,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:17,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-08-06 20:04:17,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125017529] [2021-08-06 20:04:17,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:04:17,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:04:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:04:17,124 INFO L87 Difference]: Start difference. First operand 32138 states and 133430 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:17,549 INFO L93 Difference]: Finished difference Result 43472 states and 166047 transitions. [2021-08-06 20:04:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:04:17,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:17,707 INFO L225 Difference]: With dead ends: 43472 [2021-08-06 20:04:17,707 INFO L226 Difference]: Without dead ends: 43472 [2021-08-06 20:04:17,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:04:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43472 states. [2021-08-06 20:04:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43472 to 33552. [2021-08-06 20:04:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33552 states, 33551 states have (on average 4.119221483711365) internal successors, (138204), 33551 states have internal predecessors, (138204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33552 states to 33552 states and 138204 transitions. [2021-08-06 20:04:18,721 INFO L78 Accepts]: Start accepts. Automaton has 33552 states and 138204 transitions. Word has length 45 [2021-08-06 20:04:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:18,721 INFO L470 AbstractCegarLoop]: Abstraction has 33552 states and 138204 transitions. [2021-08-06 20:04:18,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33552 states and 138204 transitions. [2021-08-06 20:04:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:18,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:18,940 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:18,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:19,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:19,155 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:19,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1031109277, now seen corresponding path program 27 times [2021-08-06 20:04:19,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:19,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128588734] [2021-08-06 20:04:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:19,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:19,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128588734] [2021-08-06 20:04:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128588734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:19,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031938602] [2021-08-06 20:04:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:19,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:19,272 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:19,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:04:19,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:04:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 20:04:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:20,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:04:20,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-08-06 20:04:20,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:04:20,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 20:04:20,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 20:04:20,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 20:04:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-06 20:04:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031938602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:20,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-08-06 20:04:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287734488] [2021-08-06 20:04:20,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:04:20,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:20,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:04:20,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:04:20,625 INFO L87 Difference]: Start difference. First operand 33552 states and 138204 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:23,754 INFO L93 Difference]: Finished difference Result 77466 states and 298381 transitions. [2021-08-06 20:04:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 20:04:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:04:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:24,200 INFO L225 Difference]: With dead ends: 77466 [2021-08-06 20:04:24,201 INFO L226 Difference]: Without dead ends: 77392 [2021-08-06 20:04:24,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=1286, Invalid=5520, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 20:04:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77392 states. [2021-08-06 20:04:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77392 to 35401. [2021-08-06 20:04:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35401 states, 35400 states have (on average 4.175621468926554) internal successors, (147817), 35400 states have internal predecessors, (147817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35401 states to 35401 states and 147817 transitions. [2021-08-06 20:04:25,925 INFO L78 Accepts]: Start accepts. Automaton has 35401 states and 147817 transitions. Word has length 45 [2021-08-06 20:04:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 35401 states and 147817 transitions. [2021-08-06 20:04:25,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 35401 states and 147817 transitions. [2021-08-06 20:04:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:04:26,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:26,209 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:26,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:26,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 20:04:26,427 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -432978515, now seen corresponding path program 28 times [2021-08-06 20:04:26,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:26,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008170247] [2021-08-06 20:04:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:26,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:26,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:26,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008170247] [2021-08-06 20:04:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008170247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:26,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201730916] [2021-08-06 20:04:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:04:26,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:26,506 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:26,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:04:27,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:04:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:04:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:27,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:27,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-06 20:04:27,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201730916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:27,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:27,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:04:27,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345427111] [2021-08-06 20:04:27,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:04:27,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:04:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:04:27,422 INFO L87 Difference]: Start difference. First operand 35401 states and 147817 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2021-08-06 20:04:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:28,037 INFO L93 Difference]: Finished difference Result 45640 states and 180213 transitions. [2021-08-06 20:04:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:04:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 45 [2021-08-06 20:04:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:28,249 INFO L225 Difference]: With dead ends: 45640 [2021-08-06 20:04:28,249 INFO L226 Difference]: Without dead ends: 45640 [2021-08-06 20:04:28,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:04:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45640 states. [2021-08-06 20:04:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45640 to 31447. [2021-08-06 20:04:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31447 states, 31446 states have (on average 4.189117852827069) internal successors, (131731), 31446 states have internal predecessors, (131731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31447 states to 31447 states and 131731 transitions. [2021-08-06 20:04:30,137 INFO L78 Accepts]: Start accepts. Automaton has 31447 states and 131731 transitions. Word has length 45 [2021-08-06 20:04:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:30,137 INFO L470 AbstractCegarLoop]: Abstraction has 31447 states and 131731 transitions. [2021-08-06 20:04:30,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2021-08-06 20:04:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 31447 states and 131731 transitions. [2021-08-06 20:04:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:04:30,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:30,238 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:30,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:30,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 20:04:30,444 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:30,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1873738769, now seen corresponding path program 29 times [2021-08-06 20:04:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:30,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300033929] [2021-08-06 20:04:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:30,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:30,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 83.3 percent of original size [2021-08-06 20:04:30,692 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 83.3 percent of original size [2021-08-06 20:04:30,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 44.2 percent of original size [2021-08-06 20:04:30,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 44.2 percent of original size [2021-08-06 20:04:30,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 44.2 percent of original size [2021-08-06 20:04:30,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 44.2 percent of original size [2021-08-06 20:04:30,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 175, result has 9.8 percent of original size [2021-08-06 20:04:30,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 175, result has 9.8 percent of original size [2021-08-06 20:04:30,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 175, result has 9.8 percent of original size [2021-08-06 20:04:30,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 175, result has 9.8 percent of original size [2021-08-06 20:04:30,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 95, result has 14.4 percent of original size [2021-08-06 20:04:30,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 95, result has 14.4 percent of original size [2021-08-06 20:04:30,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 214, result has 7.4 percent of original size [2021-08-06 20:04:30,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 214, result has 7.4 percent of original size [2021-08-06 20:04:30,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 158, result has 41.3 percent of original size [2021-08-06 20:04:30,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 158, result has 41.3 percent of original size [2021-08-06 20:04:30,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 10.0 percent of original size [2021-08-06 20:04:30,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 10.0 percent of original size [2021-08-06 20:04:30,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:04:30,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:04:30,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 20:04:30,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 20:04:30,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:04:30,990 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 55.6 percent of original size [2021-08-06 20:04:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-06 20:04:31,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:31,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300033929] [2021-08-06 20:04:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300033929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:31,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663453548] [2021-08-06 20:04:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:04:31,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:31,005 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:31,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:04:31,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:04:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:04:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:38,450 INFO L354 Elim1Store]: treesize reduction 48, result has 42.2 percent of original size [2021-08-06 20:04:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 153 [2021-08-06 20:04:43,546 INFO L354 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2021-08-06 20:04:43,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 337 treesize of output 258 [2021-08-06 20:05:07,219 INFO L354 Elim1Store]: treesize reduction 138, result has 12.1 percent of original size [2021-08-06 20:05:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 356 treesize of output 245 [2021-08-06 20:05:43,294 INFO L354 Elim1Store]: treesize reduction 40, result has 45.2 percent of original size [2021-08-06 20:05:43,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 401 treesize of output 289 [2021-08-06 20:05:43,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:05:43,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 18.5 percent of original size [2021-08-06 20:05:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:05:43,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663453548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:43,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:43,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 26 [2021-08-06 20:05:43,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121992216] [2021-08-06 20:05:43,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:05:43,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:05:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:05:43,557 INFO L87 Difference]: Start difference. First operand 31447 states and 131731 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-08-06 20:05:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:45,733 INFO L93 Difference]: Finished difference Result 33500 states and 138838 transitions. [2021-08-06 20:05:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:05:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 47 [2021-08-06 20:05:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:45,734 INFO L225 Difference]: With dead ends: 33500 [2021-08-06 20:05:45,734 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 20:05:45,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1366.3ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:05:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 20:05:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 20:05:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 20:05:45,735 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-08-06 20:05:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 20:05:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-08-06 20:05:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 20:05:45,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 20:05:45,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:05:45,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:05:45,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:05:45,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:05:45,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 20:05:45,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:05:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 20:05:45,956 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:05:45,956 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:05:45,957 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:05:45 BasicIcfg [2021-08-06 20:05:45,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:05:45,958 INFO L168 Benchmark]: Toolchain (without parser) took 139260.61 ms. Allocated memory was 199.2 MB in the beginning and 4.6 GB in the end (delta: 4.4 GB). Free memory was 178.7 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-06 20:05:45,958 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 179.9 MB in the beginning and 179.9 MB in the end (delta: 82.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:05:45,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.73 ms. Allocated memory is still 199.2 MB. Free memory was 178.6 MB in the beginning and 177.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:05:45,958 INFO L168 Benchmark]: Boogie Preprocessor took 20.74 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 176.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:05:45,958 INFO L168 Benchmark]: RCFGBuilder took 303.41 ms. Allocated memory is still 199.2 MB. Free memory was 176.0 MB in the beginning and 162.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:05:45,958 INFO L168 Benchmark]: TraceAbstraction took 138899.74 ms. Allocated memory was 199.2 MB in the beginning and 4.6 GB in the end (delta: 4.4 GB). Free memory was 161.7 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-06 20:05:45,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 179.9 MB in the beginning and 179.9 MB in the end (delta: 82.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.73 ms. Allocated memory is still 199.2 MB. Free memory was 178.6 MB in the beginning and 177.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.74 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 176.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.41 ms. Allocated memory is still 199.2 MB. Free memory was 176.0 MB in the beginning and 162.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 138899.74 ms. Allocated memory was 199.2 MB in the beginning and 4.6 GB in the end (delta: 4.4 GB). Free memory was 161.7 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2645, positive: 2242, positive conditional: 2242, positive unconditional: 0, negative: 403, negative conditional: 403, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2458, positive: 2242, positive conditional: 0, positive unconditional: 2242, negative: 216, negative conditional: 0, negative unconditional: 216, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 194, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 194, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 14, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 59, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2458, positive: 2062, positive conditional: 0, positive unconditional: 2062, negative: 202, negative conditional: 0, negative unconditional: 202, unknown: 194, unknown conditional: 0, unknown unconditional: 194] , Statistics on independence cache: Total cache size (in pairs): 194, Positive cache size: 180, Positive conditional cache size: 0, Positive unconditional cache size: 180, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Independence queries for same thread: 187 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 138725.1ms, OverallIterations: 39, TraceHistogramMax: 4, EmptinessCheckTime: 1112.7ms, AutomataDifference: 24386.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 227.3ms, PartialOrderReductionTime: 213.8ms, HoareTripleCheckerStatistics: 1826 SDtfs, 8909 SDslu, 10418 SDs, 0 SdLazy, 11456 SolverSat, 1626 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6707.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2188 GetRequests, 1201 SyntacticMatches, 29 SemanticMatches, 958 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18648 ImplicationChecksByTransitivity, 12769.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35401occurred in iteration=37, InterpolantAutomatonStates: 911, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10987.2ms AutomataMinimizationTime, 39 MinimizatonAttempts, 154206 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 211.3ms SsaConstructionTime, 773.7ms SatisfiabilityAnalysisTime, 83615.4ms InterpolantComputationTime, 2579 NumberOfCodeBlocks, 2563 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 2508 ConstructedInterpolants, 54 QuantifiedInterpolants, 17862 SizeOfPredicates, 86 NumberOfNonLiveVariables, 3260 ConjunctsInSsa, 353 ConjunctsInUnsatCore, 71 InterpolantComputations, 7 PerfectInterpolantSequences, 825/1441 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 20:05:46,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...