/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:49:36,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:49:36,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:49:36,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:49:36,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 06:49:36,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 06:49:36,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 06:49:36,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 06:49:36,610 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:49:36,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:49:36,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:49:36,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:49:36,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:49:36,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:49:36,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:49:36,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:49:36,612 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:49:36,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:49:36,613 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:49:36,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:49:36,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:49:36,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:49:36,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:49:36,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:49:36,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:49:36,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:49:36,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:49:36,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:49:36,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:49:36,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:49:36,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:49:36,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:49:36,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:49:36,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:49:36,618 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:49:36,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:49:36,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:49:36,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:49:36,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:49:36,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:49:36,854 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:49:36,857 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:49:36,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl [2022-01-18 06:49:36,858 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl' [2022-01-18 06:49:36,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:49:36,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:49:36,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:49:36,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:49:36,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:49:36,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,920 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:49:36,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:49:36,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:49:36,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:49:36,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:49:36,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:49:36,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:49:36,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:49:36,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:49:36,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/1) ... [2022-01-18 06:49:36,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:49:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:36,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:49:37,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:49:37,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:49:37,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:49:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:49:37,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:49:37,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:49:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:49:37,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:49:37,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:49:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:49:37,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:49:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:49:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:49:37,028 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:49:37,074 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:49:37,076 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:49:37,158 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:49:37,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:49:37,172 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:49:37,178 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:49:37 BoogieIcfgContainer [2022-01-18 06:49:37,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:49:37,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:49:37,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:49:37,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:49:37,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:49:36" (1/2) ... [2022-01-18 06:49:37,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f9f5b6 and model type dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:49:37, skipping insertion in model container [2022-01-18 06:49:37,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:49:37" (2/2) ... [2022-01-18 06:49:37,185 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product.wvr.bpl [2022-01-18 06:49:37,189 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:49:37,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:49:37,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:49:37,190 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:49:37,219 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:49:37,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:49:37,275 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:49:37,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:49:37,289 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 06:49:37,317 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:49:37,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:37,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:37,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash -798073446, now seen corresponding path program 1 times [2022-01-18 06:49:37,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:37,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520715378] [2022-01-18 06:49:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:37,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:37,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520715378] [2022-01-18 06:49:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520715378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:49:37,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:49:37,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:49:37,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450573485] [2022-01-18 06:49:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:49:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:49:37,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:49:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:49:37,534 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:37,598 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 06:49:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:49:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:49:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:37,621 INFO L225 Difference]: With dead ends: 217 [2022-01-18 06:49:37,621 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 06:49:37,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:49:37,638 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:37,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:49:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 06:49:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 06:49:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 06:49:37,715 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 06:49:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:37,716 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 06:49:37,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 06:49:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:49:37,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:37,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:37,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:49:37,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash 216086682, now seen corresponding path program 1 times [2022-01-18 06:49:37,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612362894] [2022-01-18 06:49:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:37,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:37,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612362894] [2022-01-18 06:49:37,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612362894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:49:37,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:49:37,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:49:37,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402837191] [2022-01-18 06:49:37,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:49:37,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:49:37,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:49:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:49:37,784 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:37,839 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 06:49:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:49:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:49:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:37,842 INFO L225 Difference]: With dead ends: 158 [2022-01-18 06:49:37,842 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 06:49:37,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:49:37,844 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:37,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:49:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 06:49:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 06:49:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 06:49:37,860 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 06:49:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 06:49:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 06:49:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:49:37,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:37,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:49:37,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 924693880, now seen corresponding path program 1 times [2022-01-18 06:49:37,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:37,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439569749] [2022-01-18 06:49:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:37,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:37,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439569749] [2022-01-18 06:49:37,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439569749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:49:37,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:49:37,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:49:37,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559232753] [2022-01-18 06:49:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:49:37,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:49:37,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:49:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:49:37,938 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:37,988 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 06:49:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:49:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:49:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:37,991 INFO L225 Difference]: With dead ends: 183 [2022-01-18 06:49:37,991 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 06:49:37,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:49:37,992 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:37,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:49:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 06:49:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 06:49:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 06:49:38,007 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 06:49:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 06:49:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 06:49:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:38,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:38,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:38,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:49:38,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash 575000696, now seen corresponding path program 1 times [2022-01-18 06:49:38,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:38,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317522626] [2022-01-18 06:49:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:38,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:38,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317522626] [2022-01-18 06:49:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317522626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339958347] [2022-01-18 06:49:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:38,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:38,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:38,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:49:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:49:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:49:38,853 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:49:38,880 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-18 06:49:38,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 18 [2022-01-18 06:49:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:38,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:39,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:39,070 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:39,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:39,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:39,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:39,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:39,171 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:39,182 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:39,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:39,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339958347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:39,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:39,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:49:39,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890240857] [2022-01-18 06:49:39,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:39,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:49:39,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:49:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:49:39,325 INFO L87 Difference]: Start difference. First operand 158 states and 448 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) [2022-01-18 06:49:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:39,634 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 06:49:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:49:39,634 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 22 [2022-01-18 06:49:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:39,637 INFO L225 Difference]: With dead ends: 366 [2022-01-18 06:49:39,637 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 06:49:39,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:49:39,639 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:39,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:49:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 06:49:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 06:49:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 06:49:39,677 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 06:49:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:39,678 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 06:49:39,678 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) [2022-01-18 06:49:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 06:49:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:39,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:39,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:39,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:39,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:39,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 407191604, now seen corresponding path program 2 times [2022-01-18 06:49:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806294518] [2022-01-18 06:49:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:39,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:40,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806294518] [2022-01-18 06:49:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806294518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399584272] [2022-01-18 06:49:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:49:40,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:40,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:40,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:49:40,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:49:40,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:49:40,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:40,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,381 INFO L387 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 27 treesize of output 31 [2022-01-18 06:49:40,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 27 [2022-01-18 06:49:40,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,407 INFO L387 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 16 treesize of output 21 [2022-01-18 06:49:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:40,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:40,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,643 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:40,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:40,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:40,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:40,697 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:40,703 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:40,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:40,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399584272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:40,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:40,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-01-18 06:49:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124676986] [2022-01-18 06:49:40,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:49:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:49:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:49:40,809 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:41,457 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 06:49:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:49:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:49:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:41,460 INFO L225 Difference]: With dead ends: 478 [2022-01-18 06:49:41,460 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 06:49:41,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:49:41,461 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:41,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 97 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:49:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 06:49:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 06:49:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 06:49:41,479 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 06:49:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:41,479 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 06:49:41,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 06:49:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:41,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:41,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:41,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:41,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:41,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 705965052, now seen corresponding path program 3 times [2022-01-18 06:49:41,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29750649] [2022-01-18 06:49:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:41,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29750649] [2022-01-18 06:49:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29750649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562438956] [2022-01-18 06:49:41,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:49:41,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:41,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:41,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:49:41,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:49:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:49:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:42,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 15 [2022-01-18 06:49:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:42,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:42,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:42,153 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:42,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:42,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:42,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:42,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:42,205 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:42,211 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:42,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:42,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562438956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:42,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:42,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:49:42,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675893526] [2022-01-18 06:49:42,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:49:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:49:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:49:42,323 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:42,640 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-18 06:49:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:49:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:49:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:42,643 INFO L225 Difference]: With dead ends: 418 [2022-01-18 06:49:42,643 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 06:49:42,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:49:42,644 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:42,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:49:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 06:49:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-18 06:49:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 06:49:42,653 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 06:49:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:42,653 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 06:49:42,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 06:49:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:42,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:42,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:42,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:42,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2018176644, now seen corresponding path program 4 times [2022-01-18 06:49:42,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417711330] [2022-01-18 06:49:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:43,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417711330] [2022-01-18 06:49:43,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417711330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206075767] [2022-01-18 06:49:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:49:43,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:43,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:43,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:49:43,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:49:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:49:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:43,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,223 INFO L387 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 31 treesize of output 35 [2022-01-18 06:49:43,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 31 [2022-01-18 06:49:43,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,243 INFO L387 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 16 treesize of output 21 [2022-01-18 06:49:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:43,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,464 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:43,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:43,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:43,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:43,528 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:43,535 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:43,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206075767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:43,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:43,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:49:43,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51038935] [2022-01-18 06:49:43,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:49:43,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:49:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:49:43,642 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-01-18 06:49:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:43,874 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-01-18 06:49:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:49:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 22 [2022-01-18 06:49:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:43,877 INFO L225 Difference]: With dead ends: 381 [2022-01-18 06:49:43,877 INFO L226 Difference]: Without dead ends: 366 [2022-01-18 06:49:43,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:49:43,878 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:43,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 06:49:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-18 06:49:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-01-18 06:49:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-01-18 06:49:43,886 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-01-18 06:49:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:43,886 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-01-18 06:49:43,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-01-18 06:49:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-01-18 06:49:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:43,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:43,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:43,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:44,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:44,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:44,111 INFO L85 PathProgramCache]: Analyzing trace with hash 29371358, now seen corresponding path program 5 times [2022-01-18 06:49:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757051813] [2022-01-18 06:49:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:44,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:44,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:44,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757051813] [2022-01-18 06:49:44,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757051813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:44,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429840401] [2022-01-18 06:49:44,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:49:44,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:44,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:44,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:44,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:49:44,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:49:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:49:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:44,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-01-18 06:49:44,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 61 [2022-01-18 06:49:44,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,486 INFO L387 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 16 treesize of output 21 [2022-01-18 06:49:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:44,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:44,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,799 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:44,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:44,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:44,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:44,857 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:44,865 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:44,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:45,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429840401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:45,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:45,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 06:49:45,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295717094] [2022-01-18 06:49:45,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:45,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:49:45,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:49:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:49:45,037 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:50,000 INFO L93 Difference]: Finished difference Result 1134 states and 3376 transitions. [2022-01-18 06:49:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 06:49:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:49:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:50,006 INFO L225 Difference]: With dead ends: 1134 [2022-01-18 06:49:50,007 INFO L226 Difference]: Without dead ends: 1119 [2022-01-18 06:49:50,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2044, Invalid=7856, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 06:49:50,010 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 547 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:50,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 238 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 691 Invalid, 0 Unknown, 372 Unchecked, 0.6s Time] [2022-01-18 06:49:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-18 06:49:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2022-01-18 06:49:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-01-18 06:49:50,024 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-01-18 06:49:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:50,024 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-01-18 06:49:50,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-01-18 06:49:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:49:50,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:50,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:50,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:50,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:50,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1593497758, now seen corresponding path program 6 times [2022-01-18 06:49:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72079516] [2022-01-18 06:49:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:50,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:50,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:50,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72079516] [2022-01-18 06:49:50,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72079516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:50,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915398158] [2022-01-18 06:49:50,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:49:50,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:50,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:50,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:49:50,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:49:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:49:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:50,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-01-18 06:49:50,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-01-18 06:49:50,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,588 INFO L387 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 16 treesize of output 21 [2022-01-18 06:49:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:50,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:50,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,812 INFO L387 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 24 treesize of output 29 [2022-01-18 06:49:50,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-01-18 06:49:50,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:49:50,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:49:50,861 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-01-18 06:49:50,866 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-01-18 06:49:50,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-01-18 06:49:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:50,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915398158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:50,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:50,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 06:49:50,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252523045] [2022-01-18 06:49:50,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:50,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:49:50,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:49:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:49:50,959 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-01-18 06:49:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:51,739 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-01-18 06:49:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:49:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-01-18 06:49:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:51,743 INFO L225 Difference]: With dead ends: 585 [2022-01-18 06:49:51,743 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 06:49:51,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:49:51,744 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:51,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:49:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 06:49:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-01-18 06:49:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 06:49:51,754 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 06:49:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:51,755 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 06:49:51,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-01-18 06:49:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 06:49:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:51,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:51,757 INFO L514 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] [2022-01-18 06:49:51,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:51,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:51,959 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1804181270, now seen corresponding path program 7 times [2022-01-18 06:49:51,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076280363] [2022-01-18 06:49:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:51,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:52,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076280363] [2022-01-18 06:49:52,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076280363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948173841] [2022-01-18 06:49:52,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:49:52,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:52,012 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:52,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:49:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:52,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:49:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:52,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:52,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948173841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:52,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:52,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:49:52,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894055420] [2022-01-18 06:49:52,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:49:52,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:49:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:49:52,243 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:53,000 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 06:49:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:49:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:49:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:53,006 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 06:49:53,006 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 06:49:53,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:49:53,007 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:53,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 200 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:49:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 06:49:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 06:49:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 06:49:53,022 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 06:49:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:53,023 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 06:49:53,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 06:49:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:53,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:53,024 INFO L514 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] [2022-01-18 06:49:53,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 06:49:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:53,232 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash 827862426, now seen corresponding path program 8 times [2022-01-18 06:49:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012366003] [2022-01-18 06:49:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:53,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:53,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012366003] [2022-01-18 06:49:53,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012366003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697884578] [2022-01-18 06:49:53,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:49:53,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:53,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:53,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:49:53,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:49:53,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:49:53,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:53,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697884578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:53,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:53,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:49:53,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571244650] [2022-01-18 06:49:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:49:53,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:49:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:49:53,520 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 06:49:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:55,366 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 06:49:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 06:49:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 06:49:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:55,375 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 06:49:55,376 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 06:49:55,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 06:49:55,379 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 482 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:55,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:49:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 06:49:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 06:49:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 06:49:55,401 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 06:49:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:55,402 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 06:49:55,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 06:49:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 06:49:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:55,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:55,403 INFO L514 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] [2022-01-18 06:49:55,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:55,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 06:49:55,626 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1394814506, now seen corresponding path program 9 times [2022-01-18 06:49:55,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356404457] [2022-01-18 06:49:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:55,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:55,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356404457] [2022-01-18 06:49:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356404457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580034807] [2022-01-18 06:49:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:49:55,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:55,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:55,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:49:55,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:49:55,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:49:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:55,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:55,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580034807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:55,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:49:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740230912] [2022-01-18 06:49:55,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:49:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:49:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:49:55,921 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 06:49:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:56,796 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 06:49:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:49:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 06:49:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:56,803 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 06:49:56,804 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 06:49:56,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:49:56,806 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 363 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:56,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 275 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:49:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 06:49:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 06:49:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 06:49:56,824 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 06:49:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:56,824 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 06:49:56,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 06:49:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 06:49:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:56,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:56,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:56,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:57,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:57,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1964014118, now seen corresponding path program 1 times [2022-01-18 06:49:57,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:57,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437151118] [2022-01-18 06:49:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:57,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:57,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437151118] [2022-01-18 06:49:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437151118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007352576] [2022-01-18 06:49:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:57,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:57,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:57,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:49:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:49:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:57,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007352576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:57,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:49:57,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938788389] [2022-01-18 06:49:57,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:57,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:49:57,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:49:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:49:57,246 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:57,387 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 06:49:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:49:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:49:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:57,391 INFO L225 Difference]: With dead ends: 685 [2022-01-18 06:49:57,391 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 06:49:57,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:49:57,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:57,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:49:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 06:49:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 06:49:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 06:49:57,404 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 06:49:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:57,405 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 06:49:57,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 06:49:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:57,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:57,406 INFO L514 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] [2022-01-18 06:49:57,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 06:49:57,616 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1893984470, now seen corresponding path program 10 times [2022-01-18 06:49:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655368707] [2022-01-18 06:49:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:57,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:57,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655368707] [2022-01-18 06:49:57,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655368707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343263569] [2022-01-18 06:49:57,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:49:57,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:57,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:57,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:49:57,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:49:57,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:57,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:49:57,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:57,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:57,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343263569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:57,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:57,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:49:57,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523592205] [2022-01-18 06:49:57,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:57,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:49:57,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:49:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:49:57,861 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-01-18 06:49:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:58,164 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 06:49:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:49:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 24 [2022-01-18 06:49:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:58,170 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 06:49:58,170 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 06:49:58,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:49:58,171 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:58,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:49:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 06:49:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 06:49:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 06:49:58,195 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 06:49:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:58,195 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 06:49:58,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-01-18 06:49:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 06:49:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:58,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:58,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:49:58,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:49:58,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1188027138, now seen corresponding path program 2 times [2022-01-18 06:49:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86530646] [2022-01-18 06:49:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:58,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86530646] [2022-01-18 06:49:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86530646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681712652] [2022-01-18 06:49:58,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:49:58,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:58,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:58,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:58,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:49:58,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:49:58,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:49:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:58,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:49:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681712652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:58,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:58,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:49:58,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708885744] [2022-01-18 06:49:58,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:58,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:49:58,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:49:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:49:58,655 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:58,862 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 06:49:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:49:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:49:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:58,868 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 06:49:58,869 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 06:49:58,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:49:58,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:58,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:49:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 06:49:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 06:49:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 06:49:58,892 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 06:49:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:58,892 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 06:49:58,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 06:49:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:58,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:58,894 INFO L514 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] [2022-01-18 06:49:58,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:49:59,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:49:59,107 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:49:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:49:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -158654428, now seen corresponding path program 11 times [2022-01-18 06:49:59,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:49:59,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046533760] [2022-01-18 06:49:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:49:59,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:49:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:49:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:59,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:49:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046533760] [2022-01-18 06:49:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046533760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:49:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471989906] [2022-01-18 06:49:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:49:59,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:49:59,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:49:59,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:49:59,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:49:59,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:49:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:49:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:49:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:59,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:49:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:49:59,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471989906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:49:59,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:49:59,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:49:59,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526148812] [2022-01-18 06:49:59,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:49:59,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:49:59,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:49:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:49:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:49:59,337 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:49:59,843 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 06:49:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 06:49:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:49:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:49:59,852 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 06:49:59,852 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 06:49:59,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:49:59,854 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:49:59,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:49:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 06:49:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 06:49:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 06:49:59,887 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 06:49:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:49:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 06:49:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:49:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 06:49:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:49:59,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:49:59,889 INFO L514 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] [2022-01-18 06:49:59,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:00,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 06:50:00,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash 626259666, now seen corresponding path program 12 times [2022-01-18 06:50:00,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256783560] [2022-01-18 06:50:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:00,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:00,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256783560] [2022-01-18 06:50:00,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256783560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681398344] [2022-01-18 06:50:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:00,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:00,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:00,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:50:00,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:50:00,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:00,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:00,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681398344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:00,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:00,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:50:00,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169291021] [2022-01-18 06:50:00,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:00,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:50:00,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:50:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:50:00,322 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:00,920 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 06:50:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:50:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:00,931 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 06:50:00,931 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 06:50:00,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:50:00,933 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:00,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 154 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 06:50:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 06:50:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 06:50:00,967 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 06:50:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:00,968 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 06:50:00,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 06:50:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:00,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:00,970 INFO L514 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] [2022-01-18 06:50:00,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:01,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:01,183 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1014315128, now seen corresponding path program 13 times [2022-01-18 06:50:01,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409893072] [2022-01-18 06:50:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:01,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:01,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:01,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409893072] [2022-01-18 06:50:01,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409893072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:01,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284669990] [2022-01-18 06:50:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:50:01,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:01,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:01,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:01,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:50:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:01,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:01,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284669990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:01,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:01,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 06:50:01,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833425627] [2022-01-18 06:50:01,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:01,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:50:01,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:50:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:50:01,384 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:01,649 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 06:50:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:50:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-01-18 06:50:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:01,656 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 06:50:01,656 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 06:50:01,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:50:01,657 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:01,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:50:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 06:50:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 06:50:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 06:50:01,685 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 06:50:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 06:50:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 06:50:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:01,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:01,688 INFO L514 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] [2022-01-18 06:50:01,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:50:01,903 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 581438524, now seen corresponding path program 14 times [2022-01-18 06:50:01,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710212660] [2022-01-18 06:50:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710212660] [2022-01-18 06:50:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710212660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171584703] [2022-01-18 06:50:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:50:01,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:01,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:50:01,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:50:01,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:02,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:02,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171584703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:02,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:02,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:50:02,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77223964] [2022-01-18 06:50:02,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:02,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:50:02,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:50:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:50:02,147 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:02,703 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 06:50:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 06:50:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:02,711 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 06:50:02,711 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 06:50:02,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:50:02,712 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 168 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 06:50:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 06:50:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 06:50:02,749 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 06:50:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:02,749 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 06:50:02,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 06:50:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:02,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:02,752 INFO L514 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] [2022-01-18 06:50:02,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:02,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:02,967 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 716068860, now seen corresponding path program 15 times [2022-01-18 06:50:02,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344694365] [2022-01-18 06:50:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:02,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:03,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344694365] [2022-01-18 06:50:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344694365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790479457] [2022-01-18 06:50:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:50:03,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:03,017 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:03,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:50:03,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:50:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:03,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790479457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:03,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:03,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:03,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636545104] [2022-01-18 06:50:03,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:03,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:03,218 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:04,129 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 06:50:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:50:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:04,141 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 06:50:04,141 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 06:50:04,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:50:04,143 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 571 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:04,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 240 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:50:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 06:50:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 06:50:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 06:50:04,190 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 06:50:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:04,190 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 06:50:04,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 06:50:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:04,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:04,193 INFO L514 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] [2022-01-18 06:50:04,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:04,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:04,416 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1935859282, now seen corresponding path program 16 times [2022-01-18 06:50:04,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960526568] [2022-01-18 06:50:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:04,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:04,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960526568] [2022-01-18 06:50:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960526568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331416004] [2022-01-18 06:50:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:50:04,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:04,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:04,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:50:04,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:50:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:04,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:04,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331416004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:04,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:04,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:04,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031476885] [2022-01-18 06:50:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:04,647 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:05,860 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 06:50:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:50:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:05,869 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 06:50:05,869 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 06:50:05,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:50:05,871 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 512 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:05,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 251 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:50:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 06:50:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 06:50:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 06:50:05,917 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 06:50:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:05,917 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 06:50:05,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 06:50:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:05,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:05,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:50:05,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:06,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:06,144 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1446822462, now seen corresponding path program 3 times [2022-01-18 06:50:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622169520] [2022-01-18 06:50:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:06,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:06,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:06,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622169520] [2022-01-18 06:50:06,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622169520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:06,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109997002] [2022-01-18 06:50:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:50:06,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:06,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:06,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:06,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:50:06,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:50:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:06,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:50:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109997002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:06,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:06,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 06:50:06,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097360190] [2022-01-18 06:50:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:06,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:50:06,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:50:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:50:06,333 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:06,456 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 06:50:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:50:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:06,459 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 06:50:06,459 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 06:50:06,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:50:06,460 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:06,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:50:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 06:50:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 06:50:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 06:50:06,481 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 06:50:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:06,481 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 06:50:06,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 06:50:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:06,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:06,484 INFO L514 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] [2022-01-18 06:50:06,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:06,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:06,703 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1917945090, now seen corresponding path program 17 times [2022-01-18 06:50:06,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:06,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832981026] [2022-01-18 06:50:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:06,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:06,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832981026] [2022-01-18 06:50:06,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832981026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:06,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862468458] [2022-01-18 06:50:06,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:50:06,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:06,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:06,744 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:50:06,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:50:06,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:06,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862468458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:06,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:06,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:50:06,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998136495] [2022-01-18 06:50:06,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:06,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:50:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:50:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:50:06,885 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:07,232 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 06:50:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:50:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:07,238 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 06:50:07,239 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 06:50:07,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:50:07,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:07,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:50:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 06:50:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 06:50:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 06:50:07,274 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 06:50:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:07,274 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 06:50:07,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 06:50:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:07,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:07,277 INFO L514 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] [2022-01-18 06:50:07,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:07,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 06:50:07,491 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash -15265638, now seen corresponding path program 18 times [2022-01-18 06:50:07,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14200484] [2022-01-18 06:50:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:07,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14200484] [2022-01-18 06:50:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14200484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791907893] [2022-01-18 06:50:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:07,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:07,525 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:07,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:50:07,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:50:07,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:07,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:07,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791907893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:07,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:50:07,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497105126] [2022-01-18 06:50:07,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:50:07,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:50:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:50:07,657 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:08,012 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 06:50:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:50:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:08,024 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 06:50:08,025 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 06:50:08,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:50:08,026 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:08,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:50:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 06:50:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 06:50:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 06:50:08,066 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 06:50:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:08,066 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 06:50:08,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 06:50:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:08,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:08,069 INFO L514 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] [2022-01-18 06:50:08,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:08,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 06:50:08,291 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1098288294, now seen corresponding path program 19 times [2022-01-18 06:50:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:08,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051338217] [2022-01-18 06:50:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:08,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:08,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051338217] [2022-01-18 06:50:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051338217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796904747] [2022-01-18 06:50:08,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:50:08,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:08,347 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) [2022-01-18 06:50:08,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:50:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:08,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796904747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:08,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:08,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 06:50:08,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515755685] [2022-01-18 06:50:08,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:08,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:50:08,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:08,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:50:08,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:50:08,537 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:50:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:08,780 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 06:50:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:50:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-18 06:50:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:08,785 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 06:50:08,785 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 06:50:08,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:50:08,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:50:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 06:50:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 06:50:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 06:50:08,812 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 06:50:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:08,812 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 06:50:08,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:50:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 06:50:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:08,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:08,815 INFO L514 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] [2022-01-18 06:50:08,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:09,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:09,038 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash -60086780, now seen corresponding path program 20 times [2022-01-18 06:50:09,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361165725] [2022-01-18 06:50:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:09,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:09,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361165725] [2022-01-18 06:50:09,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361165725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796234552] [2022-01-18 06:50:09,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:50:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:09,075 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) [2022-01-18 06:50:09,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:50:09,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:50:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:09,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:09,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796234552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:09,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:09,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:50:09,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461947332] [2022-01-18 06:50:09,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:09,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:50:09,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:50:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:50:09,201 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:09,488 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 06:50:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:50:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:09,494 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 06:50:09,494 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 06:50:09,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:50:09,495 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:09,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 121 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:50:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 06:50:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 06:50:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 06:50:09,530 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 06:50:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 06:50:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 06:50:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:09,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:09,533 INFO L514 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] [2022-01-18 06:50:09,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:09,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:09,747 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 537249878, now seen corresponding path program 21 times [2022-01-18 06:50:09,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:09,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601865329] [2022-01-18 06:50:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:09,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:09,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601865329] [2022-01-18 06:50:09,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601865329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357987177] [2022-01-18 06:50:09,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:50:09,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:09,797 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) [2022-01-18 06:50:09,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:50:09,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:50:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:09,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357987177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:09,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:09,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:50:09,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977419673] [2022-01-18 06:50:09,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:09,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:50:09,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:50:09,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:50:09,925 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:10,222 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 06:50:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:50:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:10,228 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 06:50:10,228 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 06:50:10,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:50:10,229 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:10,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 124 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:50:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 06:50:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 06:50:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 06:50:10,264 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 06:50:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:10,264 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 06:50:10,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 06:50:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:10,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:10,267 INFO L514 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] [2022-01-18 06:50:10,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:10,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:50:10,490 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 10829594, now seen corresponding path program 22 times [2022-01-18 06:50:10,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:10,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799508819] [2022-01-18 06:50:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:10,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:10,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799508819] [2022-01-18 06:50:10,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799508819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769790665] [2022-01-18 06:50:10,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:50:10,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:10,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:10,540 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) [2022-01-18 06:50:10,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:50:10,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:50:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:10,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:10,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769790665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:10,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:10,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:10,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608958180] [2022-01-18 06:50:10,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:10,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:10,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:10,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:10,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:10,762 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:50:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:11,611 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 06:50:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:50:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 06:50:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:11,624 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 06:50:11,624 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 06:50:11,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:50:11,625 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:11,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 205 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 06:50:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 06:50:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 06:50:11,695 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 06:50:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:11,696 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 06:50:11,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:50:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 06:50:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:11,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:11,699 INFO L514 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] [2022-01-18 06:50:11,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 06:50:11,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:50:11,915 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 577781674, now seen corresponding path program 23 times [2022-01-18 06:50:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503331665] [2022-01-18 06:50:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:11,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:11,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503331665] [2022-01-18 06:50:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503331665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851303650] [2022-01-18 06:50:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:50:11,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:11,968 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) [2022-01-18 06:50:11,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:50:11,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:50:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:12,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:12,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851303650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:12,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:12,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478112447] [2022-01-18 06:50:12,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:12,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:12,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:12,194 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:50:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:12,920 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 06:50:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:50:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 06:50:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:12,930 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 06:50:12,930 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 06:50:12,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:50:12,931 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:12,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 199 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 06:50:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 06:50:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 06:50:12,992 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 06:50:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 06:50:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:50:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 06:50:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:12,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:12,996 INFO L514 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] [2022-01-18 06:50:13,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:13,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:50:13,219 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -594564184, now seen corresponding path program 24 times [2022-01-18 06:50:13,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:13,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739542554] [2022-01-18 06:50:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:13,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:13,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739542554] [2022-01-18 06:50:13,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739542554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801481730] [2022-01-18 06:50:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:13,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:13,265 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) [2022-01-18 06:50:13,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:50:13,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:50:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:13,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801481730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:13,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:13,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:50:13,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321392985] [2022-01-18 06:50:13,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:13,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:50:13,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:50:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:50:13,429 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:14,073 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 06:50:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:50:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:14,080 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 06:50:14,080 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 06:50:14,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:50:14,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:14,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 189 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 06:50:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 06:50:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 06:50:14,125 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 06:50:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:14,125 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 06:50:14,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 06:50:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:14,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:14,128 INFO L514 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] [2022-01-18 06:50:14,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:14,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:14,343 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash -513188096, now seen corresponding path program 25 times [2022-01-18 06:50:14,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952194945] [2022-01-18 06:50:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:14,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:14,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952194945] [2022-01-18 06:50:14,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952194945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391668310] [2022-01-18 06:50:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:50:14,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:14,384 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) [2022-01-18 06:50:14,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:50:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:14,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391668310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:14,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:14,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:50:14,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640911853] [2022-01-18 06:50:14,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:14,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:50:14,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:50:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:50:14,576 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:15,112 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 06:50:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:50:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:15,121 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 06:50:15,121 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 06:50:15,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:50:15,122 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 387 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:15,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 153 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 06:50:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 06:50:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:50:15,176 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:50:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:15,177 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:50:15,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:50:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:15,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:15,180 INFO L514 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] [2022-01-18 06:50:15,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:15,395 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 417469120, now seen corresponding path program 26 times [2022-01-18 06:50:15,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405813761] [2022-01-18 06:50:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:15,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:15,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405813761] [2022-01-18 06:50:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405813761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825937722] [2022-01-18 06:50:15,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:50:15,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:15,438 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) [2022-01-18 06:50:15,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:50:15,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:50:15,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:15,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:15,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:15,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825937722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:15,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:15,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:15,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924981695] [2022-01-18 06:50:15,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:15,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:15,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:15,650 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:16,251 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 06:50:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:50:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:16,262 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 06:50:16,262 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 06:50:16,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 06:50:16,263 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:16,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 206 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 06:50:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 06:50:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 06:50:16,306 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 06:50:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:16,306 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 06:50:16,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 06:50:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:16,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:16,309 INFO L514 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] [2022-01-18 06:50:16,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 06:50:16,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:16,511 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2060508274, now seen corresponding path program 27 times [2022-01-18 06:50:16,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832206576] [2022-01-18 06:50:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:16,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:16,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832206576] [2022-01-18 06:50:16,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832206576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321993234] [2022-01-18 06:50:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:50:16,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:16,555 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) [2022-01-18 06:50:16,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:50:16,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:50:16,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:16,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:16,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:50:16,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321993234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:16,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:16,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:50:16,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038897570] [2022-01-18 06:50:16,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:16,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:50:16,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:50:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:50:16,729 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:17,572 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 06:50:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:50:17,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:17,579 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 06:50:17,579 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 06:50:17,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:50:17,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 332 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:17,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 201 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 06:50:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 06:50:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:50:17,619 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:50:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:17,619 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:50:17,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:50:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:17,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:17,622 INFO L514 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] [2022-01-18 06:50:17,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 06:50:17,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 06:50:17,823 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1231031038, now seen corresponding path program 28 times [2022-01-18 06:50:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558947413] [2022-01-18 06:50:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:17,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:17,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558947413] [2022-01-18 06:50:17,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558947413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155607285] [2022-01-18 06:50:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:50:17,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:17,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:17,861 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) [2022-01-18 06:50:17,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:50:17,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:50:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:17,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:18,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155607285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:18,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:50:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788639950] [2022-01-18 06:50:18,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:18,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:50:18,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:50:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:50:18,013 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:18,658 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 06:50:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:50:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 06:50:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:18,666 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 06:50:18,666 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 06:50:18,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:50:18,667 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:18,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 190 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 06:50:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 06:50:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 06:50:18,702 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 06:50:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:18,702 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 06:50:18,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 06:50:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:18,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:18,706 INFO L514 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] [2022-01-18 06:50:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:18,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:18,927 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1149654950, now seen corresponding path program 29 times [2022-01-18 06:50:18,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:18,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677796519] [2022-01-18 06:50:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:18,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:18,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677796519] [2022-01-18 06:50:18,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677796519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849862125] [2022-01-18 06:50:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:50:18,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:18,967 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) [2022-01-18 06:50:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:50:18,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:50:18,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:19,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:19,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849862125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:19,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:19,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:50:19,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932999525] [2022-01-18 06:50:19,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:19,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:50:19,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:50:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:50:19,118 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:19,630 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 06:50:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:50:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 06:50:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:19,638 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 06:50:19,638 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 06:50:19,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:50:19,639 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:19,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:50:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 06:50:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 06:50:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 06:50:19,681 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 06:50:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:19,682 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 06:50:19,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 06:50:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:19,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:19,685 INFO L514 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] [2022-01-18 06:50:19,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:19,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:19,909 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1630220374, now seen corresponding path program 30 times [2022-01-18 06:50:19,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361053786] [2022-01-18 06:50:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:19,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361053786] [2022-01-18 06:50:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361053786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457210483] [2022-01-18 06:50:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:19,958 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:19,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:50:19,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:50:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:19,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:20,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:20,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457210483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:20,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:20,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:50:20,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794038885] [2022-01-18 06:50:20,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:20,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:50:20,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:50:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:50:20,111 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:20,697 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 06:50:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:50:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 06:50:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:20,705 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 06:50:20,705 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 06:50:20,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:50:20,706 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:20,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 209 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 06:50:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 06:50:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 06:50:20,770 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 06:50:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 06:50:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 06:50:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 06:50:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:20,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:20,773 INFO L514 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] [2022-01-18 06:50:20,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 06:50:20,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 06:50:20,974 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620206, now seen corresponding path program 31 times [2022-01-18 06:50:20,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271351907] [2022-01-18 06:50:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:21,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271351907] [2022-01-18 06:50:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271351907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346978403] [2022-01-18 06:50:21,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:50:21,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:21,021 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:21,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:50:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:21,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:21,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346978403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:21,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:21,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:50:21,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438051534] [2022-01-18 06:50:21,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:21,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:50:21,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:50:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:50:21,205 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-01-18 06:50:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:21,798 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 06:50:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:50:21,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-01-18 06:50:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:21,805 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 06:50:21,806 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 06:50:21,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:50:21,806 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:21,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 06:50:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 06:50:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 06:50:21,851 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 06:50:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:21,852 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 06:50:21,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-01-18 06:50:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 06:50:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:21,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:21,856 INFO L514 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] [2022-01-18 06:50:21,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:22,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:50:22,071 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 575418948, now seen corresponding path program 32 times [2022-01-18 06:50:22,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764939736] [2022-01-18 06:50:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:22,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:22,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764939736] [2022-01-18 06:50:22,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764939736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061953691] [2022-01-18 06:50:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:50:22,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:22,122 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:22,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:50:22,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:50:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:22,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061953691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:22,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:22,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:50:22,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253845478] [2022-01-18 06:50:22,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:22,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:50:22,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:50:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:50:22,356 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-01-18 06:50:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:23,187 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 06:50:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:50:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-01-18 06:50:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:23,192 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 06:50:23,192 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 06:50:23,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:50:23,193 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:23,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 211 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 06:50:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 06:50:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 06:50:23,249 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 06:50:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:23,249 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 06:50:23,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-01-18 06:50:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 06:50:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:50:23,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:23,253 INFO L514 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] [2022-01-18 06:50:23,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 06:50:23,467 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -692038230, now seen corresponding path program 33 times [2022-01-18 06:50:23,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299322524] [2022-01-18 06:50:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:23,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:23,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299322524] [2022-01-18 06:50:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299322524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808013535] [2022-01-18 06:50:23,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:50:23,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:23,512 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:23,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:50:23,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:50:23,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:23,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:50:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:23,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808013535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:23,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:23,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:50:23,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045654038] [2022-01-18 06:50:23,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:23,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:50:23,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:50:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:50:23,689 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:24,295 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 06:50:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:50:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:50:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:24,302 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 06:50:24,302 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 06:50:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:50:24,303 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 193 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:50:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 06:50:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 06:50:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 06:50:24,338 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 06:50:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:24,339 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 06:50:24,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 06:50:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:24,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:24,342 INFO L514 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] [2022-01-18 06:50:24,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:50:24,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:50:24,542 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:24,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1837488904, now seen corresponding path program 4 times [2022-01-18 06:50:24,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:24,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035293548] [2022-01-18 06:50:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:24,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:24,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035293548] [2022-01-18 06:50:24,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035293548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482249939] [2022-01-18 06:50:24,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:50:24,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:24,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:24,741 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:24,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:50:24,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:50:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:50:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:25,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-01-18 06:50:25,077 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:50:25,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-01-18 06:50:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:25,082 INFO L387 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 25 treesize of output 21 [2022-01-18 06:50:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:25,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:25,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:25,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:25,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-01-18 06:50:25,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:25,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-01-18 06:50:25,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:25,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:25,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:50:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:27,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:27,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:27,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:50:27,202 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:50:27,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:50:27,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:27,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:27,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:50:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:27,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482249939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:27,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:50:27,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535874085] [2022-01-18 06:50:27,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:27,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:50:27,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:50:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:50:27,586 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:29,663 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-01-18 06:50:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:50:29,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 26 [2022-01-18 06:50:29,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:29,671 INFO L225 Difference]: With dead ends: 3843 [2022-01-18 06:50:29,671 INFO L226 Difference]: Without dead ends: 3813 [2022-01-18 06:50:29,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:50:29,672 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:29,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 270 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:50:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-01-18 06:50:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-01-18 06:50:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-18 06:50:29,713 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-18 06:50:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:29,713 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-18 06:50:29,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-18 06:50:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:29,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:29,717 INFO L514 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] [2022-01-18 06:50:29,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:29,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 06:50:29,917 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 429080376, now seen corresponding path program 5 times [2022-01-18 06:50:29,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:29,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485235073] [2022-01-18 06:50:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:29,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:30,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:30,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485235073] [2022-01-18 06:50:30,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485235073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027854434] [2022-01-18 06:50:30,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:50:30,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:30,112 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:30,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:50:30,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:50:30,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:30,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:50:30,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:30,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:30,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-01-18 06:50:30,425 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:50:30,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 06:50:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:30,463 INFO L387 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 20 treesize of output 16 [2022-01-18 06:50:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:30,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:30,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:30,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:30,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:50:30,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:30,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:50:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:30,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:30,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:50:32,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:32,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:32,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:50:32,128 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:50:32,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:50:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:32,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:32,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:50:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027854434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:32,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:50:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907534219] [2022-01-18 06:50:32,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:50:32,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:50:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:50:32,507 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:34,500 INFO L93 Difference]: Finished difference Result 4012 states and 12890 transitions. [2022-01-18 06:50:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:50:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:50:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:34,507 INFO L225 Difference]: With dead ends: 4012 [2022-01-18 06:50:34,508 INFO L226 Difference]: Without dead ends: 3997 [2022-01-18 06:50:34,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:50:34,509 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:34,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 261 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1125 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-01-18 06:50:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-01-18 06:50:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 1801. [2022-01-18 06:50:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.5861111111111112) internal successors, (6455), 1800 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6455 transitions. [2022-01-18 06:50:34,547 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6455 transitions. Word has length 26 [2022-01-18 06:50:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:34,547 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6455 transitions. [2022-01-18 06:50:34,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6455 transitions. [2022-01-18 06:50:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:34,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:34,550 INFO L514 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] [2022-01-18 06:50:34,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 06:50:34,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 06:50:34,750 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2020509684, now seen corresponding path program 34 times [2022-01-18 06:50:34,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041235367] [2022-01-18 06:50:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:34,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:35,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041235367] [2022-01-18 06:50:35,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041235367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456552143] [2022-01-18 06:50:35,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:50:35,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:35,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:35,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:50:35,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:50:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:50:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:35,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-01-18 06:50:35,390 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-01-18 06:50:35,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-01-18 06:50:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:35,395 INFO L387 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 20 treesize of output 16 [2022-01-18 06:50:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:35,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:35,612 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:50:35,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-01-18 06:50:35,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:35,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-01-18 06:50:35,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:35,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:35,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:35,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-01-18 06:50:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:36,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-01-18 06:50:36,285 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-01-18 06:50:36,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-01-18 06:50:36,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:36,298 INFO L387 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 17 treesize of output 11 [2022-01-18 06:50:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:36,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456552143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:36,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 06:50:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568877424] [2022-01-18 06:50:36,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:50:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:50:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:50:36,387 INFO L87 Difference]: Start difference. First operand 1801 states and 6455 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2022-01-18 06:50:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:39,284 INFO L93 Difference]: Finished difference Result 3548 states and 11961 transitions. [2022-01-18 06:50:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:50:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 26 [2022-01-18 06:50:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:39,290 INFO L225 Difference]: With dead ends: 3548 [2022-01-18 06:50:39,291 INFO L226 Difference]: Without dead ends: 3533 [2022-01-18 06:50:39,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:50:39,292 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 322 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:39,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 322 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:50:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-01-18 06:50:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1853. [2022-01-18 06:50:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.576133909287257) internal successors, (6623), 1852 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6623 transitions. [2022-01-18 06:50:39,341 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6623 transitions. Word has length 26 [2022-01-18 06:50:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:39,341 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6623 transitions. [2022-01-18 06:50:39,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2022-01-18 06:50:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6623 transitions. [2022-01-18 06:50:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:39,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:39,345 INFO L514 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] [2022-01-18 06:50:39,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 06:50:39,567 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1469410436, now seen corresponding path program 6 times [2022-01-18 06:50:39,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008433760] [2022-01-18 06:50:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:39,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:39,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008433760] [2022-01-18 06:50:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008433760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998001844] [2022-01-18 06:50:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:39,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:39,814 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:39,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:50:39,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:50:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:50:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:40,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:40,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-01-18 06:50:40,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:40,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-01-18 06:50:40,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:40,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:40,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:50:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:40,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:40,408 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:50:40,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:50:40,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:40,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:50:40,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:40,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:40,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:50:41,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:41,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:41,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:50:42,000 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:50:42,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:50:42,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:42,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:42,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:50:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998001844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:42,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 06:50:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101527553] [2022-01-18 06:50:42,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:42,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:50:42,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:50:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:50:42,381 INFO L87 Difference]: Start difference. First operand 1853 states and 6623 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 06:50:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:46,982 INFO L93 Difference]: Finished difference Result 4499 states and 14387 transitions. [2022-01-18 06:50:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 06:50:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-01-18 06:50:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:46,990 INFO L225 Difference]: With dead ends: 4499 [2022-01-18 06:50:46,990 INFO L226 Difference]: Without dead ends: 4469 [2022-01-18 06:50:46,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:50:46,991 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 557 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:46,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 650 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:50:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-01-18 06:50:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1877. [2022-01-18 06:50:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.5794243070362475) internal successors, (6715), 1876 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6715 transitions. [2022-01-18 06:50:47,032 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6715 transitions. Word has length 26 [2022-01-18 06:50:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:47,032 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6715 transitions. [2022-01-18 06:50:47,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 06:50:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6715 transitions. [2022-01-18 06:50:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:47,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:47,036 INFO L514 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] [2022-01-18 06:50:47,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 06:50:47,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 06:50:47,241 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash 80971128, now seen corresponding path program 35 times [2022-01-18 06:50:47,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232571113] [2022-01-18 06:50:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:47,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:47,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232571113] [2022-01-18 06:50:47,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232571113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538228835] [2022-01-18 06:50:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:50:47,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:47,517 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:47,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:50:47,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:50:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:47,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:50:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:47,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:47,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:47,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-01-18 06:50:47,821 INFO L353 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2022-01-18 06:50:47,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-01-18 06:50:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:47,824 INFO L387 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 22 treesize of output 16 [2022-01-18 06:50:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:48,027 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:50:48,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-01-18 06:50:48,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:48,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-01-18 06:50:48,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:48,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:48,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:48,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-01-18 06:50:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:49,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-01-18 06:50:49,388 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-01-18 06:50:49,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-01-18 06:50:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:49,392 INFO L387 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 17 treesize of output 11 [2022-01-18 06:50:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538228835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:49,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:49,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 06:50:49,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777379373] [2022-01-18 06:50:49,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:50:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:50:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:50:49,476 INFO L87 Difference]: Start difference. First operand 1877 states and 6715 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:50:53,254 INFO L93 Difference]: Finished difference Result 4376 states and 14404 transitions. [2022-01-18 06:50:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:50:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:50:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:50:53,262 INFO L225 Difference]: With dead ends: 4376 [2022-01-18 06:50:53,262 INFO L226 Difference]: Without dead ends: 4329 [2022-01-18 06:50:53,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:50:53,264 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 445 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:50:53,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 470 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:50:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-01-18 06:50:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1914. [2022-01-18 06:50:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.5765812859383166) internal successors, (6842), 1913 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6842 transitions. [2022-01-18 06:50:53,330 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6842 transitions. Word has length 26 [2022-01-18 06:50:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:50:53,330 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 6842 transitions. [2022-01-18 06:50:53,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:50:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6842 transitions. [2022-01-18 06:50:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:50:53,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:50:53,334 INFO L514 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] [2022-01-18 06:50:53,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 06:50:53,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:53,547 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:50:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:50:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -895347716, now seen corresponding path program 36 times [2022-01-18 06:50:53,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:50:53,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811603954] [2022-01-18 06:50:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:50:53,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:50:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:50:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:53,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:50:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811603954] [2022-01-18 06:50:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811603954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:50:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507778947] [2022-01-18 06:50:53,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:50:53,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:50:53,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:50:53,800 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:50:53,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:50:53,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:50:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:50:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:50:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:50:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:54,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2022-01-18 06:50:54,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:54,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 124 [2022-01-18 06:50:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:54,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:54,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-01-18 06:50:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:50:56,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:50:56,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-01-18 06:50:56,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:56,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-01-18 06:50:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:56,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:50:56,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-01-18 06:50:58,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:58,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:50:58,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-01-18 06:50:58,561 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-01-18 06:50:58,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-01-18 06:50:58,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:50:58,564 INFO L387 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 17 treesize of output 11 [2022-01-18 06:50:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:50:58,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507778947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:50:58,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:50:58,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-18 06:50:58,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633039560] [2022-01-18 06:50:58,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:50:58,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:50:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:50:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:50:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:50:58,647 INFO L87 Difference]: Start difference. First operand 1914 states and 6842 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:09,536 INFO L93 Difference]: Finished difference Result 5648 states and 18021 transitions. [2022-01-18 06:51:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-01-18 06:51:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:09,545 INFO L225 Difference]: With dead ends: 5648 [2022-01-18 06:51:09,546 INFO L226 Difference]: Without dead ends: 5588 [2022-01-18 06:51:09,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15357 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=4191, Invalid=33639, Unknown=0, NotChecked=0, Total=37830 [2022-01-18 06:51:09,548 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 755 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:09,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 922 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 06:51:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-01-18 06:51:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 2010. [2022-01-18 06:51:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.5614733698357393) internal successors, (7155), 2009 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7155 transitions. [2022-01-18 06:51:09,616 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7155 transitions. Word has length 26 [2022-01-18 06:51:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:09,616 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 7155 transitions. [2022-01-18 06:51:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7155 transitions. [2022-01-18 06:51:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:09,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:09,619 INFO L514 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] [2022-01-18 06:51:09,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 06:51:09,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:09,820 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -713845664, now seen corresponding path program 7 times [2022-01-18 06:51:09,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:09,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874951386] [2022-01-18 06:51:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:09,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:10,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874951386] [2022-01-18 06:51:10,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874951386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058785535] [2022-01-18 06:51:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:51:10,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:10,036 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:10,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:51:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:51:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:10,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:10,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-01-18 06:51:10,357 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:51:10,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-01-18 06:51:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:10,360 INFO L387 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 20 treesize of output 16 [2022-01-18 06:51:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:10,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:10,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:10,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:10,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:51:10,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:10,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:10,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:10,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:12,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:12,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:12,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:12,497 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:12,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:12,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:12,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:12,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:12,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058785535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:12,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:12,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:51:12,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413088009] [2022-01-18 06:51:12,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:12,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:51:12,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:51:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:51:12,826 INFO L87 Difference]: Start difference. First operand 2010 states and 7155 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:14,365 INFO L93 Difference]: Finished difference Result 3994 states and 13061 transitions. [2022-01-18 06:51:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:51:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:14,375 INFO L225 Difference]: With dead ends: 3994 [2022-01-18 06:51:14,375 INFO L226 Difference]: Without dead ends: 3979 [2022-01-18 06:51:14,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:51:14,376 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 465 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:14,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 276 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1062 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-01-18 06:51:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-01-18 06:51:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2041. [2022-01-18 06:51:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.556862745098039) internal successors, (7256), 2040 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7256 transitions. [2022-01-18 06:51:14,427 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7256 transitions. Word has length 26 [2022-01-18 06:51:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:14,427 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7256 transitions. [2022-01-18 06:51:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7256 transitions. [2022-01-18 06:51:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:14,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:14,430 INFO L514 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] [2022-01-18 06:51:14,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 06:51:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 06:51:14,631 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2087213910, now seen corresponding path program 8 times [2022-01-18 06:51:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71225551] [2022-01-18 06:51:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:14,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:14,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71225551] [2022-01-18 06:51:14,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71225551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180435635] [2022-01-18 06:51:14,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:51:14,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:14,856 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:51:14,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:51:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:51:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:15,185 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-18 06:51:15,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 215 [2022-01-18 06:51:15,217 INFO L353 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2022-01-18 06:51:15,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 132 [2022-01-18 06:51:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:15,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:15,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-01-18 06:51:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:15,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:15,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-01-18 06:51:15,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:15,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:15,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:15,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-01-18 06:51:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-18 06:51:15,981 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-01-18 06:51:15,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 06:51:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:15,985 INFO L387 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 17 treesize of output 11 [2022-01-18 06:51:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:16,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180435635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:16,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:16,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 06:51:16,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191136037] [2022-01-18 06:51:16,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:51:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:51:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:51:16,110 INFO L87 Difference]: Start difference. First operand 2041 states and 7256 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:21,237 INFO L93 Difference]: Finished difference Result 4646 states and 15150 transitions. [2022-01-18 06:51:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:51:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:21,246 INFO L225 Difference]: With dead ends: 4646 [2022-01-18 06:51:21,246 INFO L226 Difference]: Without dead ends: 4601 [2022-01-18 06:51:21,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1423, Invalid=8279, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 06:51:21,247 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 494 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:21,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 782 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2046 Invalid, 0 Unknown, 1150 Unchecked, 1.0s Time] [2022-01-18 06:51:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-01-18 06:51:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2094. [2022-01-18 06:51:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.560917343526039) internal successors, (7453), 2093 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7453 transitions. [2022-01-18 06:51:21,291 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7453 transitions. Word has length 26 [2022-01-18 06:51:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:21,291 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7453 transitions. [2022-01-18 06:51:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7453 transitions. [2022-01-18 06:51:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:21,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:21,294 INFO L514 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] [2022-01-18 06:51:21,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 06:51:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:51:21,495 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1088334556, now seen corresponding path program 9 times [2022-01-18 06:51:21,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:21,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20334410] [2022-01-18 06:51:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:21,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:21,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20334410] [2022-01-18 06:51:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20334410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799936055] [2022-01-18 06:51:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:51:21,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:21,727 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:21,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:51:21,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:51:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:51:21,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:22,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-01-18 06:51:22,053 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:51:22,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 06:51:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:22,056 INFO L387 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 20 treesize of output 16 [2022-01-18 06:51:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:22,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:22,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:22,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:22,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:51:22,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:22,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:22,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:22,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:24,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:24,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:24,244 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:24,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:24,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:24,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799936055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:24,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:51:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771282491] [2022-01-18 06:51:24,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:51:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:51:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:51:24,635 INFO L87 Difference]: Start difference. First operand 2094 states and 7453 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:27,084 INFO L93 Difference]: Finished difference Result 4343 states and 14153 transitions. [2022-01-18 06:51:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:51:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:27,091 INFO L225 Difference]: With dead ends: 4343 [2022-01-18 06:51:27,092 INFO L226 Difference]: Without dead ends: 4328 [2022-01-18 06:51:27,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=957, Invalid=3735, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:51:27,093 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 531 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:27,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 314 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1190 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-01-18 06:51:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-01-18 06:51:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2101. [2022-01-18 06:51:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 3.5642857142857145) internal successors, (7485), 2100 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 7485 transitions. [2022-01-18 06:51:27,138 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 7485 transitions. Word has length 26 [2022-01-18 06:51:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:27,139 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 7485 transitions. [2022-01-18 06:51:27,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 7485 transitions. [2022-01-18 06:51:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:27,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:27,143 INFO L514 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] [2022-01-18 06:51:27,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 06:51:27,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 06:51:27,361 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1589099960, now seen corresponding path program 10 times [2022-01-18 06:51:27,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522078470] [2022-01-18 06:51:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:27,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:27,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:27,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522078470] [2022-01-18 06:51:27,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522078470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888028704] [2022-01-18 06:51:27,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:51:27,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:27,559 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:27,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:51:27,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:51:27,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:51:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:27,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:27,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-18 06:51:27,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:27,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-01-18 06:51:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:27,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:27,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:51:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:27,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:28,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:51:28,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:28,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:28,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:28,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:28,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:28,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:28,840 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:28,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:28,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:28,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:28,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:29,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888028704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:29,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:29,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:51:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856047210] [2022-01-18 06:51:29,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:29,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:51:29,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:51:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:51:29,353 INFO L87 Difference]: Start difference. First operand 2101 states and 7485 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-01-18 06:51:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:32,390 INFO L93 Difference]: Finished difference Result 4739 states and 15412 transitions. [2022-01-18 06:51:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:51:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 26 [2022-01-18 06:51:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:32,399 INFO L225 Difference]: With dead ends: 4739 [2022-01-18 06:51:32,399 INFO L226 Difference]: Without dead ends: 4709 [2022-01-18 06:51:32,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:51:32,400 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:32,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 423 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1454 Invalid, 0 Unknown, 245 Unchecked, 0.8s Time] [2022-01-18 06:51:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-01-18 06:51:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 2096. [2022-01-18 06:51:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.562291169451074) internal successors, (7463), 2095 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7463 transitions. [2022-01-18 06:51:32,471 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7463 transitions. Word has length 26 [2022-01-18 06:51:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:32,471 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7463 transitions. [2022-01-18 06:51:32,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-01-18 06:51:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7463 transitions. [2022-01-18 06:51:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:32,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:32,474 INFO L514 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] [2022-01-18 06:51:32,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:51:32,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:32,675 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -455050340, now seen corresponding path program 11 times [2022-01-18 06:51:32,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178522665] [2022-01-18 06:51:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:32,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:32,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178522665] [2022-01-18 06:51:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178522665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077353440] [2022-01-18 06:51:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:51:32,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:32,896 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:32,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:51:32,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:51:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:51:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:33,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:33,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 06:51:33,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:33,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-01-18 06:51:33,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:33,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:33,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:51:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:33,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:33,459 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:51:33,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:51:33,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:33,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:33,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:33,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:33,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:35,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:35,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:35,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:35,801 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:35,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:35,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:35,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:35,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:35,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:36,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077353440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:36,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:36,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 06:51:36,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501602269] [2022-01-18 06:51:36,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:36,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:51:36,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:51:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:51:36,145 INFO L87 Difference]: Start difference. First operand 2096 states and 7463 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 06:51:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:38,923 INFO L93 Difference]: Finished difference Result 4040 states and 13349 transitions. [2022-01-18 06:51:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:51:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-01-18 06:51:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:38,931 INFO L225 Difference]: With dead ends: 4040 [2022-01-18 06:51:38,931 INFO L226 Difference]: Without dead ends: 4010 [2022-01-18 06:51:38,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 06:51:38,932 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 281 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:38,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:51:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-01-18 06:51:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2094. [2022-01-18 06:51:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.5618729096989967) internal successors, (7455), 2093 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7455 transitions. [2022-01-18 06:51:38,986 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7455 transitions. Word has length 26 [2022-01-18 06:51:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:38,986 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7455 transitions. [2022-01-18 06:51:38,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 06:51:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7455 transitions. [2022-01-18 06:51:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:38,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:38,990 INFO L514 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] [2022-01-18 06:51:39,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 06:51:39,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:51:39,190 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2073438884, now seen corresponding path program 12 times [2022-01-18 06:51:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650551905] [2022-01-18 06:51:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:39,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:39,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:39,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650551905] [2022-01-18 06:51:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650551905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:39,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371200559] [2022-01-18 06:51:39,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:51:39,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:39,396 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:39,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:51:39,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:51:39,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:51:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:39,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:39,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 06:51:39,712 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:51:39,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-01-18 06:51:39,715 INFO L387 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 25 treesize of output 21 [2022-01-18 06:51:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:39,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:39,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-01-18 06:51:39,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:39,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-01-18 06:51:39,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:39,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:39,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:41,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:41,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:41,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:41,508 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:41,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:41,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:41,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:41,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:41,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371200559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:41,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:41,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 06:51:41,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152385761] [2022-01-18 06:51:41,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:41,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:51:41,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:51:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:51:41,961 INFO L87 Difference]: Start difference. First operand 2094 states and 7455 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:44,145 INFO L93 Difference]: Finished difference Result 4187 states and 13537 transitions. [2022-01-18 06:51:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 06:51:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:44,153 INFO L225 Difference]: With dead ends: 4187 [2022-01-18 06:51:44,153 INFO L226 Difference]: Without dead ends: 4095 [2022-01-18 06:51:44,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=615, Invalid=2691, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:51:44,154 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:44,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 397 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:51:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-01-18 06:51:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2238. [2022-01-18 06:51:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.545820295037997) internal successors, (7932), 2237 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7932 transitions. [2022-01-18 06:51:44,212 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7932 transitions. Word has length 26 [2022-01-18 06:51:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:44,212 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 7932 transitions. [2022-01-18 06:51:44,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7932 transitions. [2022-01-18 06:51:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:44,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:44,217 INFO L514 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] [2022-01-18 06:51:44,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 06:51:44,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:44,431 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash 560738446, now seen corresponding path program 13 times [2022-01-18 06:51:44,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:44,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007445726] [2022-01-18 06:51:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:44,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:44,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007445726] [2022-01-18 06:51:44,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007445726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072393863] [2022-01-18 06:51:44,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:51:44,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:44,650 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:44,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:51:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:51:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:44,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-01-18 06:51:44,918 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:51:44,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-01-18 06:51:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:44,921 INFO L387 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 25 treesize of output 21 [2022-01-18 06:51:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:44,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:45,147 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:51:45,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:51:45,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:45,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:51:45,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:45,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:45,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:48,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:48,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:48,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:48,257 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:48,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:48,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:48,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:48,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:48,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:48,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072393863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:48,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:48,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 06:51:48,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063317740] [2022-01-18 06:51:48,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:51:48,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:51:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:51:48,591 INFO L87 Difference]: Start difference. First operand 2238 states and 7932 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:51,618 INFO L93 Difference]: Finished difference Result 4478 states and 14711 transitions. [2022-01-18 06:51:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:51:51,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:51,627 INFO L225 Difference]: With dead ends: 4478 [2022-01-18 06:51:51,627 INFO L226 Difference]: Without dead ends: 4438 [2022-01-18 06:51:51,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:51:51,628 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:51,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 456 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:51:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-01-18 06:51:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 2306. [2022-01-18 06:51:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.547939262472885) internal successors, (8178), 2305 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8178 transitions. [2022-01-18 06:51:51,679 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8178 transitions. Word has length 26 [2022-01-18 06:51:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:51,679 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8178 transitions. [2022-01-18 06:51:51,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8178 transitions. [2022-01-18 06:51:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:51,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:51,683 INFO L514 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] [2022-01-18 06:51:51,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:51:51,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 06:51:51,884 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:51,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1495978748, now seen corresponding path program 14 times [2022-01-18 06:51:51,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:51,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147838151] [2022-01-18 06:51:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:51,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:52,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147838151] [2022-01-18 06:51:52,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147838151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836401739] [2022-01-18 06:51:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:51:52,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:52,103 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:51:52,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:51:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:51:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:52,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:52,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-01-18 06:51:52,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-01-18 06:51:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:52,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:51:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:52,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:52,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-01-18 06:51:52,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-01-18 06:51:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:52,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:52,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:51:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:54,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:54,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:54,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:51:54,323 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:51:54,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:51:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:54,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:54,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:51:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:54,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836401739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:51:54,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:51:54,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 06:51:54,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084329882] [2022-01-18 06:51:54,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:51:54,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:51:54,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:51:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:51:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:51:54,668 INFO L87 Difference]: Start difference. First operand 2306 states and 8178 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:51:56,951 INFO L93 Difference]: Finished difference Result 4536 states and 14768 transitions. [2022-01-18 06:51:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:51:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:51:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:51:56,960 INFO L225 Difference]: With dead ends: 4536 [2022-01-18 06:51:56,960 INFO L226 Difference]: Without dead ends: 4447 [2022-01-18 06:51:56,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:51:56,961 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:51:56,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 225 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 856 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-01-18 06:51:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-01-18 06:51:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 2342. [2022-01-18 06:51:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.552755232806493) internal successors, (8317), 2341 states have internal predecessors, (8317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8317 transitions. [2022-01-18 06:51:57,017 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8317 transitions. Word has length 26 [2022-01-18 06:51:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:51:57,017 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 8317 transitions. [2022-01-18 06:51:57,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:51:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8317 transitions. [2022-01-18 06:51:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:51:57,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:51:57,021 INFO L514 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] [2022-01-18 06:51:57,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 06:51:57,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 06:51:57,222 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:51:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:51:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 961943836, now seen corresponding path program 15 times [2022-01-18 06:51:57,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:51:57,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329928552] [2022-01-18 06:51:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:51:57,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:51:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:51:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:57,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:51:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329928552] [2022-01-18 06:51:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329928552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:51:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396200852] [2022-01-18 06:51:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:51:57,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:51:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:51:57,452 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:51:57,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:51:57,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:51:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:51:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:51:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:51:59,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:51:59,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:59,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-01-18 06:51:59,257 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:51:59,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 06:51:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:51:59,260 INFO L387 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 20 treesize of output 16 [2022-01-18 06:51:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:51:59,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:51:59,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:59,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-01-18 06:51:59,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:59,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-01-18 06:51:59,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:51:59,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-01-18 06:52:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:04,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396200852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:04,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:04,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:52:04,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316956995] [2022-01-18 06:52:04,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:04,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:52:04,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:52:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-01-18 06:52:04,197 INFO L87 Difference]: Start difference. First operand 2342 states and 8317 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:08,132 INFO L93 Difference]: Finished difference Result 4016 states and 13362 transitions. [2022-01-18 06:52:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:52:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:52:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:08,140 INFO L225 Difference]: With dead ends: 4016 [2022-01-18 06:52:08,140 INFO L226 Difference]: Without dead ends: 3983 [2022-01-18 06:52:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=594, Invalid=2483, Unknown=3, NotChecked=0, Total=3080 [2022-01-18 06:52:08,141 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:08,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 244 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 708 Invalid, 0 Unknown, 356 Unchecked, 0.4s Time] [2022-01-18 06:52:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-01-18 06:52:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2371. [2022-01-18 06:52:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.5544303797468353) internal successors, (8424), 2370 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 8424 transitions. [2022-01-18 06:52:08,185 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 8424 transitions. Word has length 26 [2022-01-18 06:52:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 8424 transitions. [2022-01-18 06:52:08,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 8424 transitions. [2022-01-18 06:52:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:52:08,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:08,189 INFO L514 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] [2022-01-18 06:52:08,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 06:52:08,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:08,391 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash -655588944, now seen corresponding path program 16 times [2022-01-18 06:52:08,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655070630] [2022-01-18 06:52:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:08,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655070630] [2022-01-18 06:52:08,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655070630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56654654] [2022-01-18 06:52:08,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:08,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:08,612 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:08,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 06:52:08,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:52:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:08,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:08,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-01-18 06:52:08,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:08,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-01-18 06:52:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:08,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:08,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:52:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:09,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:09,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:09,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:52:09,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:09,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:52:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:09,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:09,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:52:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:10,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:10,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:10,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:52:10,327 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:52:10,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:52:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:10,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:10,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:10,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:52:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56654654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:10,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:10,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:52:10,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282682270] [2022-01-18 06:52:10,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:10,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:52:10,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:52:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:52:10,854 INFO L87 Difference]: Start difference. First operand 2371 states and 8424 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-01-18 06:52:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:13,301 INFO L93 Difference]: Finished difference Result 4739 states and 15611 transitions. [2022-01-18 06:52:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:52:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 26 [2022-01-18 06:52:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:13,310 INFO L225 Difference]: With dead ends: 4739 [2022-01-18 06:52:13,310 INFO L226 Difference]: Without dead ends: 4695 [2022-01-18 06:52:13,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:52:13,311 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 490 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:13,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 283 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 881 Invalid, 0 Unknown, 339 Unchecked, 0.5s Time] [2022-01-18 06:52:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-01-18 06:52:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 2402. [2022-01-18 06:52:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 3.5622657226155767) internal successors, (8553), 2401 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 8553 transitions. [2022-01-18 06:52:13,365 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 8553 transitions. Word has length 26 [2022-01-18 06:52:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:13,366 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 8553 transitions. [2022-01-18 06:52:13,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2022-01-18 06:52:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 8553 transitions. [2022-01-18 06:52:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:52:13,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:13,369 INFO L514 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] [2022-01-18 06:52:13,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:13,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 06:52:13,570 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:13,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1949435448, now seen corresponding path program 17 times [2022-01-18 06:52:13,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:13,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498281972] [2022-01-18 06:52:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:13,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:13,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498281972] [2022-01-18 06:52:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498281972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725751050] [2022-01-18 06:52:13,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:13,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:13,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:13,819 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:13,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:52:13,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:52:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:16,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-01-18 06:52:16,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-01-18 06:52:16,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:16,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:52:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:16,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:16,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-01-18 06:52:16,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-01-18 06:52:16,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:16,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:16,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:52:17,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:17,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:17,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:17,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:52:17,371 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:52:17,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:52:17,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:17,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:17,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:52:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725751050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:18,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:18,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:52:18,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288677591] [2022-01-18 06:52:18,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:52:18,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:52:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-01-18 06:52:18,066 INFO L87 Difference]: Start difference. First operand 2402 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 06:52:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:20,929 INFO L93 Difference]: Finished difference Result 4699 states and 15443 transitions. [2022-01-18 06:52:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:52:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 26 [2022-01-18 06:52:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:20,938 INFO L225 Difference]: With dead ends: 4699 [2022-01-18 06:52:20,938 INFO L226 Difference]: Without dead ends: 4617 [2022-01-18 06:52:20,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1030, Invalid=5130, Unknown=2, NotChecked=0, Total=6162 [2022-01-18 06:52:20,938 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 410 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:20,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 331 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1217 Invalid, 0 Unknown, 378 Unchecked, 0.7s Time] [2022-01-18 06:52:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-01-18 06:52:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2487. [2022-01-18 06:52:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 3.5595333869670154) internal successors, (8849), 2486 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 8849 transitions. [2022-01-18 06:52:20,988 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 8849 transitions. Word has length 26 [2022-01-18 06:52:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:20,988 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 8849 transitions. [2022-01-18 06:52:20,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-01-18 06:52:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 8849 transitions. [2022-01-18 06:52:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:52:20,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:20,992 INFO L514 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] [2022-01-18 06:52:21,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 06:52:21,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 06:52:21,192 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:21,192 INFO L85 PathProgramCache]: Analyzing trace with hash 702714798, now seen corresponding path program 18 times [2022-01-18 06:52:21,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:21,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448379241] [2022-01-18 06:52:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:21,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:21,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448379241] [2022-01-18 06:52:21,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448379241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833454424] [2022-01-18 06:52:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:21,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:21,425 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:21,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:52:21,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:52:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:52:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:23,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:23,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-01-18 06:52:23,137 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-01-18 06:52:23,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-01-18 06:52:23,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:23,141 INFO L387 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 20 treesize of output 16 [2022-01-18 06:52:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:23,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:23,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-01-18 06:52:23,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:23,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-01-18 06:52:23,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:23,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-01-18 06:53:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833454424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:10,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:10,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:53:10,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308758690] [2022-01-18 06:53:10,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:10,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:53:10,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:53:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-01-18 06:53:10,122 INFO L87 Difference]: Start difference. First operand 2487 states and 8849 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:14,332 INFO L93 Difference]: Finished difference Result 4278 states and 14188 transitions. [2022-01-18 06:53:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:53:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:53:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:14,341 INFO L225 Difference]: With dead ends: 4278 [2022-01-18 06:53:14,341 INFO L226 Difference]: Without dead ends: 4245 [2022-01-18 06:53:14,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=609, Invalid=2580, Unknown=3, NotChecked=0, Total=3192 [2022-01-18 06:53:14,342 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:14,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 288 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 712 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2022-01-18 06:53:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-01-18 06:53:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2488. [2022-01-18 06:53:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 3.560514676316848) internal successors, (8855), 2487 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 8855 transitions. [2022-01-18 06:53:14,390 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 8855 transitions. Word has length 26 [2022-01-18 06:53:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:14,390 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 8855 transitions. [2022-01-18 06:53:14,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 8855 transitions. [2022-01-18 06:53:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:14,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:14,394 INFO L514 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] [2022-01-18 06:53:14,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 06:53:14,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:14,594 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820314, now seen corresponding path program 19 times [2022-01-18 06:53:14,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299886079] [2022-01-18 06:53:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:14,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:14,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:14,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299886079] [2022-01-18 06:53:14,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299886079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:14,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309113776] [2022-01-18 06:53:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:14,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:14,832 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:14,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:53:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:53:14,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:15,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 06:53:15,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-01-18 06:53:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:15,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-01-18 06:53:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:15,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-01-18 06:53:15,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-01-18 06:53:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:15,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-01-18 06:53:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:18,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:18,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:18,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-01-18 06:53:18,913 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-01-18 06:53:18,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-01-18 06:53:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:18,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:18,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-01-18 06:53:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309113776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:19,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:53:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546149998] [2022-01-18 06:53:19,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:53:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:53:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:53:19,326 INFO L87 Difference]: Start difference. First operand 2488 states and 8855 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:21,803 INFO L93 Difference]: Finished difference Result 4800 states and 15839 transitions. [2022-01-18 06:53:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:53:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:53:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:21,813 INFO L225 Difference]: With dead ends: 4800 [2022-01-18 06:53:21,813 INFO L226 Difference]: Without dead ends: 4764 [2022-01-18 06:53:21,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:53:21,814 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 495 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:21,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 304 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 921 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-01-18 06:53:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2022-01-18 06:53:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2490. [2022-01-18 06:53:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.56046605062274) internal successors, (8862), 2489 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 8862 transitions. [2022-01-18 06:53:21,868 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 8862 transitions. Word has length 26 [2022-01-18 06:53:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:21,868 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 8862 transitions. [2022-01-18 06:53:21,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 8862 transitions. [2022-01-18 06:53:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:21,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:21,873 INFO L514 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] [2022-01-18 06:53:21,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 06:53:22,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:22,075 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2089528438, now seen corresponding path program 37 times [2022-01-18 06:53:22,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758032098] [2022-01-18 06:53:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:22,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:22,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758032098] [2022-01-18 06:53:22,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758032098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109789865] [2022-01-18 06:53:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:22,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:22,336 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:22,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:53:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:53:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:22,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:22,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:22,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 68 [2022-01-18 06:53:22,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:22,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 118 [2022-01-18 06:53:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:22,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:22,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-01-18 06:53:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:23,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 68 [2022-01-18 06:53:23,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:23,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-01-18 06:53:23,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:23,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2022-01-18 06:53:23,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:23,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:53:23,747 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-01-18 06:53:23,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-01-18 06:53:23,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:23,752 INFO L387 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 17 treesize of output 11 [2022-01-18 06:53:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:23,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109789865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:23,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:23,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:53:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702767651] [2022-01-18 06:53:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:23,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:53:23,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:53:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:53:23,879 INFO L87 Difference]: Start difference. First operand 2490 states and 8862 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 06:53:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:26,358 INFO L93 Difference]: Finished difference Result 4251 states and 14249 transitions. [2022-01-18 06:53:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:53:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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 26 [2022-01-18 06:53:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:26,367 INFO L225 Difference]: With dead ends: 4251 [2022-01-18 06:53:26,367 INFO L226 Difference]: Without dead ends: 4206 [2022-01-18 06:53:26,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=809, Invalid=3883, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:53:26,368 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:26,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 308 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:53:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-01-18 06:53:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 2520. [2022-01-18 06:53:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 3.55577610162763) internal successors, (8957), 2519 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 8957 transitions. [2022-01-18 06:53:26,416 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 8957 transitions. Word has length 26 [2022-01-18 06:53:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 8957 transitions. [2022-01-18 06:53:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 06:53:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 8957 transitions. [2022-01-18 06:53:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:26,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:26,420 INFO L514 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] [2022-01-18 06:53:26,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 06:53:26,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:26,621 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash -971763080, now seen corresponding path program 38 times [2022-01-18 06:53:26,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:26,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144653837] [2022-01-18 06:53:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:26,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:26,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144653837] [2022-01-18 06:53:26,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144653837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244447545] [2022-01-18 06:53:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:53:26,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:26,856 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:26,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 06:53:26,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:53:26,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:53:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:27,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:27,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-01-18 06:53:27,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:27,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 115 [2022-01-18 06:53:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:27,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:27,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:27,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-01-18 06:53:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:27,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:38,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:38,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 75 [2022-01-18 06:53:38,071 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-01-18 06:53:38,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 45 [2022-01-18 06:53:38,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:38,076 INFO L387 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 17 treesize of output 11 [2022-01-18 06:53:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:38,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244447545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:38,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:38,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-01-18 06:53:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612929238] [2022-01-18 06:53:38,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:38,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:53:38,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:53:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=500, Unknown=8, NotChecked=0, Total=600 [2022-01-18 06:53:38,110 INFO L87 Difference]: Start difference. First operand 2520 states and 8957 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:40,604 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3))) (< c_i c_N) (not (< c_k c_N))) (<= 0 c_M)) is different from false [2022-01-18 06:53:42,499 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* (- 1) (select (select c_mult (select c_A 1)) (select c_B 1))) c_res1) (select (select c_mult (select c_A 0)) (select c_B 0))) (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (= 2 c_i) (< 1 c_N) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M) (= c_res2 (let ((.cse4 (+ (- 1) c_k))) (select (select c_mult (select c_A .cse4)) (select c_B .cse4))))) is different from false [2022-01-18 06:53:43,931 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M)) is different from false [2022-01-18 06:54:02,831 WARN L228 SmtUtils]: Spent 15.47s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 06:54:27,250 WARN L228 SmtUtils]: Spent 15.73s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 06:54:56,404 WARN L228 SmtUtils]: Spent 16.33s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 06:54:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:56,536 INFO L93 Difference]: Finished difference Result 6301 states and 20785 transitions. [2022-01-18 06:54:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 06:54:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:54:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:56,548 INFO L225 Difference]: With dead ends: 6301 [2022-01-18 06:54:56,548 INFO L226 Difference]: Without dead ends: 6133 [2022-01-18 06:54:56,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 88.0s TimeCoverageRelationStatistics Valid=890, Invalid=5572, Unknown=30, NotChecked=480, Total=6972 [2022-01-18 06:54:56,549 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 364 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:56,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 547 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1869 Invalid, 0 Unknown, 416 Unchecked, 1.0s Time] [2022-01-18 06:54:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-01-18 06:54:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 2611. [2022-01-18 06:54:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.539463601532567) internal successors, (9238), 2610 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 9238 transitions. [2022-01-18 06:54:56,615 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 9238 transitions. Word has length 26 [2022-01-18 06:54:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:56,616 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 9238 transitions. [2022-01-18 06:54:56,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 9238 transitions. [2022-01-18 06:54:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:56,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:56,620 INFO L514 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] [2022-01-18 06:54:56,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 06:54:56,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 06:54:56,820 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash 96111484, now seen corresponding path program 39 times [2022-01-18 06:54:56,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:56,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675684993] [2022-01-18 06:54:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:56,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:57,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675684993] [2022-01-18 06:54:57,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675684993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748204111] [2022-01-18 06:54:57,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:57,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:57,090 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:57,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 06:54:57,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:54:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:54:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:57,501 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-01-18 06:54:57,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 225 [2022-01-18 06:54:57,543 INFO L353 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-01-18 06:54:57,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 151 [2022-01-18 06:54:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:57,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:57,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:54:57,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 Received shutdown request... [2022-01-18 07:02:31,301 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:02:31,302 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 07:02:31,304 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 07:02:31,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 07:02:31,332 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:02:31,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 07:02:31,504 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. [2022-01-18 07:02:31,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 07:02:31,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 07:02:31,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 07:02:31,508 INFO L732 BasicCegarLoop]: Path program histogram: [39, 19, 1, 1, 1] [2022-01-18 07:02:31,510 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:02:31,510 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:02:31,512 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:02:31 BasicIcfg [2022-01-18 07:02:31,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:02:31,512 INFO L158 Benchmark]: Toolchain (without parser) took 774617.33ms. Allocated memory was 369.1MB in the beginning and 503.3MB in the end (delta: 134.2MB). Free memory was 330.2MB in the beginning and 270.2MB in the end (delta: 60.0MB). Peak memory consumption was 316.1MB. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 369.1MB. Free memory was 331.4MB in the beginning and 331.3MB in the end (delta: 78.6kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.77ms. Allocated memory is still 369.1MB. Free memory was 330.1MB in the beginning and 328.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 INFO L158 Benchmark]: Boogie Preprocessor took 23.22ms. Allocated memory is still 369.1MB. Free memory was 328.6MB in the beginning and 327.7MB in the end (delta: 966.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 INFO L158 Benchmark]: RCFGBuilder took 230.29ms. Allocated memory is still 369.1MB. Free memory was 327.6MB in the beginning and 318.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 INFO L158 Benchmark]: TraceAbstraction took 774333.05ms. Allocated memory was 369.1MB in the beginning and 503.3MB in the end (delta: 134.2MB). Free memory was 317.8MB in the beginning and 270.2MB in the end (delta: 47.6MB). Peak memory consumption was 303.5MB. Max. memory is 16.0GB. [2022-01-18 07:02:31,513 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 0.13ms. Allocated memory is still 369.1MB. Free memory was 331.4MB in the beginning and 331.3MB in the end (delta: 78.6kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.77ms. Allocated memory is still 369.1MB. Free memory was 330.1MB in the beginning and 328.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.22ms. Allocated memory is still 369.1MB. Free memory was 328.6MB in the beginning and 327.7MB in the end (delta: 966.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 230.29ms. Allocated memory is still 369.1MB. Free memory was 327.6MB in the beginning and 318.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 774333.05ms. Allocated memory was 369.1MB in the beginning and 503.3MB in the end (delta: 134.2MB). Free memory was 317.8MB in the beginning and 270.2MB in the end (delta: 47.6MB). Peak memory consumption was 303.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 774.2s, OverallIterations: 61, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.2s, AutomataDifference: 171.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19519 SdHoareTripleChecker+Valid, 26.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19519 mSDsluCounter, 14459 SdHoareTripleChecker+Invalid, 22.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4427 IncrementalHoareTripleChecker+Unchecked, 25530 mSDsCounter, 3947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51087 IncrementalHoareTripleChecker+Invalid, 59461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3947 mSolverCounterUnsat, 1424 mSDtfsCounter, 51087 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5461 GetRequests, 2127 SyntacticMatches, 165 SemanticMatches, 3169 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 79105 ImplicationChecksByTransitivity, 167.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2611occurred in iteration=60, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 60 MinimizatonAttempts, 98568 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 131.2s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2848 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4078 ConstructedInterpolants, 35 QuantifiedInterpolants, 59352 SizeOfPredicates, 654 NumberOfNonLiveVariables, 3533 ConjunctsInSsa, 846 ConjunctsInUnsatCore, 174 InterpolantComputations, 3 PerfectInterpolantSequences, 174/878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown