/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:12:01,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:12:01,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:12:02,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 15:12:02,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 15:12:02,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 15:12:02,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 15:12:02,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 15:12:02,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 15:12:02,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 15:12:02,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 15:12:02,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 15:12:02,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 15:12:02,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 15:12:02,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 15:12:02,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 15:12:02,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 15:12:02,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 15:12:02,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 15:12:02,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 15:12:02,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 15:12:02,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 15:12:02,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 15:12:02,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 15:12:02,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 15:12:02,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 15:12:02,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 15:12:02,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 15:12:02,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 15:12:02,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 15:12:02,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 15:12:02,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 15:12:02,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 15:12:02,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 15:12:02,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 15:12:02,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 15:12:02,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 15:12:02,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 15:12:02,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:12:02,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:12:02,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:12:02,065 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 [2021-08-06 15:12:02,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:12:02,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:12:02,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:12:02,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:12:02,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:12:02,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:12:02,106 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:12:02,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:12:02,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:12:02,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:12:02,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:12:02,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:12:02,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:12:02,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:12:02,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:12:02,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:12:02,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:12:02,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:12:02,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:12:02,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:12:02,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:12:02,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:12:02,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:12:02,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:02,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:12:02,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:12:02,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:12:02,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:12:02,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:12:02,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:12:02,474 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:12:02,475 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:12:02,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-08-06 15:12:02,476 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-08-06 15:12:02,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:12:02,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:12:02,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:02,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:12:02,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:12:02,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:02,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:12:02,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:12:02,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:12:02,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:12:02,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:12:02,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:12:02,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:12:02,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:02,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 15:12:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 15:12:02,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:12:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:12:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:12:02,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:12:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:12:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:12:02,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:12:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:12:02,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:12:02,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:12:02,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:12:02,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:12:02,659 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:12:02,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:12:02,929 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:12:02,931 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:02 BoogieIcfgContainer [2021-08-06 15:12:02,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:12:02,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:12:02,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:12:02,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:12:02,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/2) ... [2021-08-06 15:12:02,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f546741 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:12:02, skipping insertion in model container [2021-08-06 15:12:02,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:02" (2/2) ... [2021-08-06 15:12:02,938 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-08-06 15:12:02,942 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:12:02,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:12:02,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:12:02,942 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:12:02,994 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:12:03,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:12:03,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 15:12:03,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:12:03,046 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-08-06 15:12:03,135 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:03,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1250089448, now seen corresponding path program 1 times [2021-08-06 15:12:03,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614359273] [2021-08-06 15:12:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:03,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614359273] [2021-08-06 15:12:03,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614359273] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330468016] [2021-08-06 15:12:03,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:03,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:03,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,359 INFO L87 Difference]: Start difference. First operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,413 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-08-06 15:12:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,443 INFO L225 Difference]: With dead ends: 1114 [2021-08-06 15:12:03,443 INFO L226 Difference]: Without dead ends: 1114 [2021-08-06 15:12:03,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-06 15:12:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-08-06 15:12:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-08-06 15:12:03,562 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-08-06 15:12:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,562 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-08-06 15:12:03,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-08-06 15:12:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:03,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:12:03,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1768543911, now seen corresponding path program 1 times [2021-08-06 15:12:03,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104738115] [2021-08-06 15:12:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:03,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104738115] [2021-08-06 15:12:03,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104738115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:12:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889982149] [2021-08-06 15:12:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:03,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,640 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,656 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-08-06 15:12:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:12:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,663 INFO L225 Difference]: With dead ends: 1117 [2021-08-06 15:12:03,663 INFO L226 Difference]: Without dead ends: 1117 [2021-08-06 15:12:03,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-08-06 15:12:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-08-06 15:12:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-08-06 15:12:03,718 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-08-06 15:12:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,719 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-08-06 15:12:03,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-08-06 15:12:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:03,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:12:03,722 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1697787189, now seen corresponding path program 2 times [2021-08-06 15:12:03,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739542579] [2021-08-06 15:12:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:03,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739542579] [2021-08-06 15:12:03,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739542579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:03,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214772998] [2021-08-06 15:12:03,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:03,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,761 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,778 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-08-06 15:12:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:12:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,786 INFO L225 Difference]: With dead ends: 1228 [2021-08-06 15:12:03,786 INFO L226 Difference]: Without dead ends: 1228 [2021-08-06 15:12:03,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-08-06 15:12:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-08-06 15:12:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-08-06 15:12:03,864 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-08-06 15:12:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-08-06 15:12:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-08-06 15:12:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:12:03,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:12:03,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash -370597703, now seen corresponding path program 1 times [2021-08-06 15:12:03,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586156955] [2021-08-06 15:12:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:03,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586156955] [2021-08-06 15:12:03,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586156955] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:03,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287939346] [2021-08-06 15:12:03,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:03,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,925 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,945 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-08-06 15:12:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 15:12:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,954 INFO L225 Difference]: With dead ends: 1783 [2021-08-06 15:12:03,954 INFO L226 Difference]: Without dead ends: 1405 [2021-08-06 15:12:03,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-08-06 15:12:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-08-06 15:12:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-08-06 15:12:03,995 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-08-06 15:12:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,996 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-08-06 15:12:03,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-08-06 15:12:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:12:04,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:04,000 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:12:04,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1433478102, now seen corresponding path program 1 times [2021-08-06 15:12:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:04,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463254718] [2021-08-06 15:12:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:04,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:04,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:04,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463254718] [2021-08-06 15:12:04,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463254718] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:04,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:04,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:12:04,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882515776] [2021-08-06 15:12:04,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:04,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:04,034 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:04,047 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-08-06 15:12:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 37 [2021-08-06 15:12:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:04,053 INFO L225 Difference]: With dead ends: 915 [2021-08-06 15:12:04,053 INFO L226 Difference]: Without dead ends: 915 [2021-08-06 15:12:04,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-06 15:12:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-08-06 15:12:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-08-06 15:12:04,078 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-08-06 15:12:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:04,078 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-08-06 15:12:04,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-08-06 15:12:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:12:04,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:04,081 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:04,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:12:04,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2073694574, now seen corresponding path program 2 times [2021-08-06 15:12:04,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:04,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639484645] [2021-08-06 15:12:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:04,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:04,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:04,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639484645] [2021-08-06 15:12:04,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639484645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:04,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847888476] [2021-08-06 15:12:04,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:04,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:04,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:04,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:12:04,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:12:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:04,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:04,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847888476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:04,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-06 15:12:04,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013551316] [2021-08-06 15:12:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:12:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:12:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:12:04,800 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:05,132 INFO L93 Difference]: Finished difference Result 1089 states and 3111 transitions. [2021-08-06 15:12:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:12:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:12:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:05,139 INFO L225 Difference]: With dead ends: 1089 [2021-08-06 15:12:05,139 INFO L226 Difference]: Without dead ends: 1089 [2021-08-06 15:12:05,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-06 15:12:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 981. [2021-08-06 15:12:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.843877551020408) internal successors, (2787), 980 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2787 transitions. [2021-08-06 15:12:05,170 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2787 transitions. Word has length 37 [2021-08-06 15:12:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:05,172 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 2787 transitions. [2021-08-06 15:12:05,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2787 transitions. [2021-08-06 15:12:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 15:12:05,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:05,176 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:05,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-06 15:12:05,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash 527779565, now seen corresponding path program 3 times [2021-08-06 15:12:05,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:05,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793803110] [2021-08-06 15:12:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:05,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:05,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:05,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793803110] [2021-08-06 15:12:05,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793803110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:05,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962290377] [2021-08-06 15:12:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:05,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:05,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:05,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:12:05,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:12:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:12:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:12:05,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:05,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962290377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:05,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:05,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 15:12:05,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571949141] [2021-08-06 15:12:05,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:12:05,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:12:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:12:05,947 INFO L87 Difference]: Start difference. First operand 981 states and 2787 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:06,166 INFO L93 Difference]: Finished difference Result 1282 states and 3686 transitions. [2021-08-06 15:12:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:12:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 42 [2021-08-06 15:12:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:06,174 INFO L225 Difference]: With dead ends: 1282 [2021-08-06 15:12:06,174 INFO L226 Difference]: Without dead ends: 1282 [2021-08-06 15:12:06,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:12:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-08-06 15:12:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1085. [2021-08-06 15:12:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.8625461254612548) internal successors, (3103), 1084 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 3103 transitions. [2021-08-06 15:12:06,208 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 3103 transitions. Word has length 42 [2021-08-06 15:12:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:06,208 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 3103 transitions. [2021-08-06 15:12:06,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 3103 transitions. [2021-08-06 15:12:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:12:06,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:06,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:06,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:06,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-06 15:12:06,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash -571850497, now seen corresponding path program 4 times [2021-08-06 15:12:06,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:06,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700416648] [2021-08-06 15:12:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:06,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:12:06,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:06,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700416648] [2021-08-06 15:12:06,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700416648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:06,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473517433] [2021-08-06 15:12:06,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:06,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:06,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:06,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:12:06,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:06,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:12:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:12:06,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473517433] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:06,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:12:06,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 15:12:06,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647051599] [2021-08-06 15:12:06,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:06,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:06,853 INFO L87 Difference]: Start difference. First operand 1085 states and 3103 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:06,873 INFO L93 Difference]: Finished difference Result 2090 states and 5979 transitions. [2021-08-06 15:12:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 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 47 [2021-08-06 15:12:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:06,884 INFO L225 Difference]: With dead ends: 2090 [2021-08-06 15:12:06,884 INFO L226 Difference]: Without dead ends: 2071 [2021-08-06 15:12:06,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-06 15:12:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1782. [2021-08-06 15:12:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 2.9348680516563728) internal successors, (5227), 1781 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5227 transitions. [2021-08-06 15:12:06,939 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5227 transitions. Word has length 47 [2021-08-06 15:12:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 5227 transitions. [2021-08-06 15:12:06,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5227 transitions. [2021-08-06 15:12:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:12:06,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:06,945 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:06,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:07,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:07,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2135625367, now seen corresponding path program 5 times [2021-08-06 15:12:07,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:07,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797271736] [2021-08-06 15:12:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:07,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:12:07,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:07,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797271736] [2021-08-06 15:12:07,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797271736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:07,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367094274] [2021-08-06 15:12:07,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:07,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:07,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:07,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:12:07,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:12:07,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:12:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:07,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:12:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:12:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367094274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:08,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:08,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-06 15:12:08,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742674626] [2021-08-06 15:12:08,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:12:08,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:12:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:12:08,302 INFO L87 Difference]: Start difference. First operand 1782 states and 5227 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-08-06 15:12:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:08,510 INFO L93 Difference]: Finished difference Result 3759 states and 11172 transitions. [2021-08-06 15:12:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:12:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 47 [2021-08-06 15:12:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:08,526 INFO L225 Difference]: With dead ends: 3759 [2021-08-06 15:12:08,526 INFO L226 Difference]: Without dead ends: 3024 [2021-08-06 15:12:08,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:12:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-08-06 15:12:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2478. [2021-08-06 15:12:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.9644731530076704) internal successors, (7343), 2477 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 7343 transitions. [2021-08-06 15:12:08,601 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 7343 transitions. Word has length 47 [2021-08-06 15:12:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:08,601 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 7343 transitions. [2021-08-06 15:12:08,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-08-06 15:12:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 7343 transitions. [2021-08-06 15:12:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 15:12:08,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:08,608 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:08,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:08,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:08,821 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1758235514, now seen corresponding path program 6 times [2021-08-06 15:12:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:08,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921221967] [2021-08-06 15:12:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:08,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:12:08,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:08,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921221967] [2021-08-06 15:12:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921221967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:08,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389429335] [2021-08-06 15:12:08,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:08,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:08,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:08,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:12:09,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:12:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:12:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:12:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389429335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:09,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:12:09,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 15:12:09,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804489649] [2021-08-06 15:12:09,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:09,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:09,275 INFO L87 Difference]: Start difference. First operand 2478 states and 7343 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:09,307 INFO L93 Difference]: Finished difference Result 4728 states and 14010 transitions. [2021-08-06 15:12:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:09,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 15:12:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:09,332 INFO L225 Difference]: With dead ends: 4728 [2021-08-06 15:12:09,332 INFO L226 Difference]: Without dead ends: 4688 [2021-08-06 15:12:09,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4688 states. [2021-08-06 15:12:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4688 to 3600. [2021-08-06 15:12:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 3.0227841066963044) internal successors, (10879), 3599 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 10879 transitions. [2021-08-06 15:12:09,453 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 10879 transitions. Word has length 52 [2021-08-06 15:12:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:09,453 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 10879 transitions. [2021-08-06 15:12:09,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 10879 transitions. [2021-08-06 15:12:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 15:12:09,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:09,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:09,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 15:12:09,705 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1899159900, now seen corresponding path program 7 times [2021-08-06 15:12:09,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:09,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367770253] [2021-08-06 15:12:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:09,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:09,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:09,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367770253] [2021-08-06 15:12:09,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367770253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:09,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463642299] [2021-08-06 15:12:09,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:09,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:09,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:09,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:12:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:12:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:12:10,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463642299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:10,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:10,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-08-06 15:12:10,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131277881] [2021-08-06 15:12:10,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:12:10,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:12:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:12:10,386 INFO L87 Difference]: Start difference. First operand 3600 states and 10879 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:10,497 INFO L93 Difference]: Finished difference Result 671 states and 1625 transitions. [2021-08-06 15:12:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 15:12:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:10,500 INFO L225 Difference]: With dead ends: 671 [2021-08-06 15:12:10,500 INFO L226 Difference]: Without dead ends: 629 [2021-08-06 15:12:10,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:12:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-06 15:12:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-08-06 15:12:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-08-06 15:12:10,513 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-08-06 15:12:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:10,513 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-08-06 15:12:10,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-08-06 15:12:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 15:12:10,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:10,515 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:10,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:10,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:10,738 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:10,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1756713199, now seen corresponding path program 8 times [2021-08-06 15:12:10,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:10,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853784267] [2021-08-06 15:12:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:10,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:12:11,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:11,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853784267] [2021-08-06 15:12:11,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853784267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:11,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966990614] [2021-08-06 15:12:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:11,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:11,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:11,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:12:11,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:11,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:11,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:12:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:12:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966990614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:11,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:11,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-06 15:12:11,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790352642] [2021-08-06 15:12:11,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:12:11,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:12:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:12:11,672 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:12,074 INFO L93 Difference]: Finished difference Result 559 states and 1310 transitions. [2021-08-06 15:12:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:12:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 15:12:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:12,075 INFO L225 Difference]: With dead ends: 559 [2021-08-06 15:12:12,075 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 15:12:12,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:12:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 15:12:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-08-06 15:12:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-08-06 15:12:12,086 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-08-06 15:12:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:12,086 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-08-06 15:12:12,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-08-06 15:12:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 15:12:12,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:12,088 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:12,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:12,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:12,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1970893599, now seen corresponding path program 9 times [2021-08-06 15:12:12,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:12,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455720368] [2021-08-06 15:12:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:12,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:12:13,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:13,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455720368] [2021-08-06 15:12:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455720368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:13,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90163290] [2021-08-06 15:12:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:13,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:13,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:12:13,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:12:13,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:12:13,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:13,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 15:12:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:14,827 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:12:14,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:12:14,996 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:12:14,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-08-06 15:12:15,173 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:12:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 34 [2021-08-06 15:12:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:12:15,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90163290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:15,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:15,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-08-06 15:12:15,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836094940] [2021-08-06 15:12:15,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 15:12:15,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 15:12:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:12:15,617 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:18,574 INFO L93 Difference]: Finished difference Result 709 states and 1634 transitions. [2021-08-06 15:12:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:12:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 15:12:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:18,575 INFO L225 Difference]: With dead ends: 709 [2021-08-06 15:12:18,575 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 15:12:18,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3008.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3553, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:12:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 15:12:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 15:12:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 15:12:18,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-08-06 15:12:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 15:12:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 15:12:18,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 15:12:18,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:12:18,579 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:12:18,579 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:12:18,579 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:12:18,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:18,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 15:12:18,783 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:12:18,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:12:18,785 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:12:18 BasicIcfg [2021-08-06 15:12:18,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:12:18,785 INFO L168 Benchmark]: Toolchain (without parser) took 16263.55 ms. Allocated memory was 185.6 MB in the beginning and 434.1 MB in the end (delta: 248.5 MB). Free memory was 166.8 MB in the beginning and 365.4 MB in the end (delta: -198.6 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:12:18,785 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 168.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:12:18,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.97 ms. Allocated memory is still 185.6 MB. Free memory was 166.7 MB in the beginning and 165.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:12:18,785 INFO L168 Benchmark]: Boogie Preprocessor took 28.02 ms. Allocated memory is still 185.6 MB. Free memory was 165.2 MB in the beginning and 164.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:12:18,786 INFO L168 Benchmark]: RCFGBuilder took 347.87 ms. Allocated memory is still 185.6 MB. Free memory was 164.0 MB in the beginning and 145.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-08-06 15:12:18,786 INFO L168 Benchmark]: TraceAbstraction took 15851.32 ms. Allocated memory was 185.6 MB in the beginning and 434.1 MB in the end (delta: 248.5 MB). Free memory was 145.5 MB in the beginning and 365.4 MB in the end (delta: -220.0 MB). Peak memory consumption was 29.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:12:18,786 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 168.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.97 ms. Allocated memory is still 185.6 MB. Free memory was 166.7 MB in the beginning and 165.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.02 ms. Allocated memory is still 185.6 MB. Free memory was 165.2 MB in the beginning and 164.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.87 ms. Allocated memory is still 185.6 MB. Free memory was 164.0 MB in the beginning and 145.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15851.32 ms. Allocated memory was 185.6 MB in the beginning and 434.1 MB in the end (delta: 248.5 MB). Free memory was 145.5 MB in the beginning and 365.4 MB in the end (delta: -220.0 MB). Peak memory consumption was 29.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 15753.9ms, OverallIterations: 13, TraceHistogramMax: 3, EmptinessCheckTime: 115.7ms, AutomataDifference: 4565.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 99.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 724 SDtfs, 1860 SDslu, 3643 SDs, 0 SdLazy, 2527 SolverSat, 348 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1294.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 371 SyntacticMatches, 4 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 4069.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3600occurred in iteration=10, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 637.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 2450 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 95.8ms SsaConstructionTime, 371.1ms SatisfiabilityAnalysisTime, 6995.2ms InterpolantComputationTime, 937 NumberOfCodeBlocks, 937 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 916 ConstructedInterpolants, 0 QuantifiedInterpolants, 6207 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1024 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 149/325 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 15:12:18,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...