/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:31:51,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:31:51,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:31:51,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 06:31:51,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 06:31:51,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 06:31:51,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 06:31:51,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 06:31:51,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 06:31:51,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 06:31:51,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 06:31:51,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 06:31:51,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 06:31:51,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 06:31:51,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 06:31:51,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 06:31:51,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 06:31:51,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 06:31:51,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 06:31:51,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 06:31:51,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 06:31:51,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 06:31:51,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 06:31:51,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 06:31:51,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 06:31:51,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 06:31:51,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 06:31:51,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 06:31:51,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 06:31:51,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 06:31:51,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 06:31:51,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 06:31:51,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 06:31:51,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 06:31:51,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 06:31:51,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 06:31:51,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 06:31:51,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 06:31:51,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 06:31:51,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 06:31:51,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 06:31:51,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 06:31:51,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:31:51,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:31:51,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:31:51,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:31:51,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:31:51,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:31:51,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:31:51,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:31:51,266 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:31:51,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:31:51,267 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:31:51,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:31:51,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:31:51,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:31:51,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:31:51,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:31:51,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:31:51,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:31:51,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:31:51,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:31:51,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:31:51,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:31:51,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:31:51,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:31:51,507 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:31:51,508 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:31:51,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2022-01-18 06:31:51,509 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2022-01-18 06:31:51,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:31:51,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:31:51,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:31:51,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:31:51,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:31:51,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,550 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:31:51,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:31:51,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:31:51,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:31:51,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:31:51,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:31:51,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:31:51,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:31:51,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:31:51,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/1) ... [2022-01-18 06:31:51,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:31:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:51,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:31:51,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:31:51,616 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:31:51,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:31:51,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:31:51,616 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:31:51,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:31:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:31:51,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:31:51,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:31:51,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:31:51,618 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:31:51,652 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:31:51,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:31:51,724 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:31:51,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:31:51,739 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:31:51,740 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:31:51 BoogieIcfgContainer [2022-01-18 06:31:51,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:31:51,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:31:51,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:31:51,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:31:51,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:31:51" (1/2) ... [2022-01-18 06:31:51,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba9b87f and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:31:51, skipping insertion in model container [2022-01-18 06:31:51,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:31:51" (2/2) ... [2022-01-18 06:31:51,747 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2022-01-18 06:31:51,750 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:31:51,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:31:51,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:31:51,751 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:31:51,774 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 06:31:51,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:31:51,816 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:31:51,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 06:31:51,827 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2022-01-18 06:31:51,841 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 06:31:51,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:51,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:51,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2022-01-18 06:31:51,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162801744] [2022-01-18 06:31:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:51,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:51,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162801744] [2022-01-18 06:31:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162801744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:31:51,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:31:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:31:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636702882] [2022-01-18 06:31:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:31:51,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:31:51,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:52,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:31:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:31:52,004 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:52,046 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2022-01-18 06:31:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:31:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-18 06:31:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:52,055 INFO L225 Difference]: With dead ends: 38 [2022-01-18 06:31:52,071 INFO L226 Difference]: Without dead ends: 38 [2022-01-18 06:31:52,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:31:52,076 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:52,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:31:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-18 06:31:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-18 06:31:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2022-01-18 06:31:52,127 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2022-01-18 06:31:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:52,129 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2022-01-18 06:31:52,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2022-01-18 06:31:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:31:52,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:52,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:52,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:31:52,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2022-01-18 06:31:52,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:52,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479182015] [2022-01-18 06:31:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:52,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:52,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479182015] [2022-01-18 06:31:52,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479182015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:31:52,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:31:52,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:31:52,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570614331] [2022-01-18 06:31:52,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:31:52,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:31:52,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:31:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:31:52,192 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:52,232 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-01-18 06:31:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:31:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:31:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:52,234 INFO L225 Difference]: With dead ends: 62 [2022-01-18 06:31:52,234 INFO L226 Difference]: Without dead ends: 62 [2022-01-18 06:31:52,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:31:52,236 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:52,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:31:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-18 06:31:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-18 06:31:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2022-01-18 06:31:52,246 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2022-01-18 06:31:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:52,247 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2022-01-18 06:31:52,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2022-01-18 06:31:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:31:52,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:52,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:52,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:31:52,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2022-01-18 06:31:52,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:52,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877341584] [2022-01-18 06:31:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:52,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:31:52,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877341584] [2022-01-18 06:31:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877341584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:31:52,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:31:52,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:31:52,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337878743] [2022-01-18 06:31:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:31:52,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:31:52,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:31:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:31:52,296 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:52,321 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2022-01-18 06:31:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:31:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:31:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:52,323 INFO L225 Difference]: With dead ends: 87 [2022-01-18 06:31:52,323 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 06:31:52,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:31:52,325 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:31:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 06:31:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-01-18 06:31:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2022-01-18 06:31:52,335 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2022-01-18 06:31:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:52,335 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2022-01-18 06:31:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2022-01-18 06:31:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:31:52,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:52,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:52,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:31:52,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2022-01-18 06:31:52,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:52,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898002323] [2022-01-18 06:31:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:52,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:31:52,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898002323] [2022-01-18 06:31:52,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898002323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080400820] [2022-01-18 06:31:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:31:52,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:52,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:31:52,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:31:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:31:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:31:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:31:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:53,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:54,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080400820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:54,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:54,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-01-18 06:31:54,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713808200] [2022-01-18 06:31:54,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:54,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 06:31:54,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 06:31:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:31:54,230 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:55,386 INFO L93 Difference]: Finished difference Result 216 states and 395 transitions. [2022-01-18 06:31:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:31:55,387 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:31:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:55,388 INFO L225 Difference]: With dead ends: 216 [2022-01-18 06:31:55,389 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 06:31:55,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:31:55,391 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:55,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 164 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:31:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 06:31:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-01-18 06:31:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 159 transitions. [2022-01-18 06:31:55,401 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 159 transitions. Word has length 22 [2022-01-18 06:31:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:55,402 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 159 transitions. [2022-01-18 06:31:55,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 159 transitions. [2022-01-18 06:31:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:31:55,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:55,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:55,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 06:31:55,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:55,620 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2022-01-18 06:31:55,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:55,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803139485] [2022-01-18 06:31:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:55,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:55,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:55,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803139485] [2022-01-18 06:31:55,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803139485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:55,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351179858] [2022-01-18 06:31:55,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:31:55,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:55,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:31:55,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:31:55,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:31:55,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:31:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:31:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:56,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351179858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:56,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 06:31:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277397233] [2022-01-18 06:31:56,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:31:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:31:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:31:56,889 INFO L87 Difference]: Start difference. First operand 82 states and 159 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:31:57,985 INFO L93 Difference]: Finished difference Result 230 states and 427 transitions. [2022-01-18 06:31:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 06:31:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:31:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:57,987 INFO L225 Difference]: With dead ends: 230 [2022-01-18 06:31:57,987 INFO L226 Difference]: Without dead ends: 216 [2022-01-18 06:31:57,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=599, Invalid=2371, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:31:57,990 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:57,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 152 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:31:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-18 06:31:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2022-01-18 06:31:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-01-18 06:31:58,006 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-01-18 06:31:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:58,006 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-01-18 06:31:58,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-01-18 06:31:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:31:58,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:58,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:31:58,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 06:31:58,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:58,235 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:31:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2022-01-18 06:31:58,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797922506] [2022-01-18 06:31:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:58,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:58,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:58,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797922506] [2022-01-18 06:31:58,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797922506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:58,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074256945] [2022-01-18 06:31:58,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:31:58,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:58,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:58,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:31:58,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:31:58,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:31:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:31:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:31:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:58,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:59,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074256945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:59,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:59,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2022-01-18 06:31:59,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870343036] [2022-01-18 06:31:59,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:59,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:31:59,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:31:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:31:59,430 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:00,538 INFO L93 Difference]: Finished difference Result 273 states and 531 transitions. [2022-01-18 06:32:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:32:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:32:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:00,540 INFO L225 Difference]: With dead ends: 273 [2022-01-18 06:32:00,540 INFO L226 Difference]: Without dead ends: 244 [2022-01-18 06:32:00,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=740, Invalid=2920, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:32:00,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:00,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 134 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:32:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-18 06:32:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2022-01-18 06:32:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-01-18 06:32:00,549 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-01-18 06:32:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:00,550 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-01-18 06:32:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-01-18 06:32:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:32:00,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:00,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:00,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:00,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:00,764 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2022-01-18 06:32:00,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:00,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503791994] [2022-01-18 06:32:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:00,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:00,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503791994] [2022-01-18 06:32:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503791994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798927121] [2022-01-18 06:32:00,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:32:00,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:00,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:00,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:32:00,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:32:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:32:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:01,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798927121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:01,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:01,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 06:32:01,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244721204] [2022-01-18 06:32:01,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:01,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:32:01,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:32:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:32:01,929 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:03,389 INFO L93 Difference]: Finished difference Result 251 states and 474 transitions. [2022-01-18 06:32:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 06:32:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:32:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:03,391 INFO L225 Difference]: With dead ends: 251 [2022-01-18 06:32:03,391 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 06:32:03,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=3389, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:32:03,393 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:03,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 178 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:32:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 06:32:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 127. [2022-01-18 06:32:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 126 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 264 transitions. [2022-01-18 06:32:03,401 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 264 transitions. Word has length 22 [2022-01-18 06:32:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 264 transitions. [2022-01-18 06:32:03,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 264 transitions. [2022-01-18 06:32:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:32:03,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:03,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:03,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:03,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:03,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2022-01-18 06:32:03,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394529330] [2022-01-18 06:32:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:03,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:03,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:03,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394529330] [2022-01-18 06:32:03,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394529330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:03,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129682926] [2022-01-18 06:32:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:32:03,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:03,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:03,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:32:03,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:32:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:32:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:04,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:04,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129682926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:04,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:04,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-01-18 06:32:04,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272883547] [2022-01-18 06:32:04,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:04,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 06:32:04,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 06:32:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:32:04,712 INFO L87 Difference]: Start difference. First operand 127 states and 264 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:06,174 INFO L93 Difference]: Finished difference Result 329 states and 643 transitions. [2022-01-18 06:32:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:32:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:32:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:06,176 INFO L225 Difference]: With dead ends: 329 [2022-01-18 06:32:06,176 INFO L226 Difference]: Without dead ends: 265 [2022-01-18 06:32:06,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=843, Invalid=3713, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:32:06,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 291 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 134 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:32:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-18 06:32:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2022-01-18 06:32:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-01-18 06:32:06,186 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-01-18 06:32:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:06,186 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-01-18 06:32:06,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-01-18 06:32:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:32:06,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:06,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:06,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:06,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:06,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2022-01-18 06:32:06,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871797148] [2022-01-18 06:32:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:06,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:06,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871797148] [2022-01-18 06:32:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871797148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244569924] [2022-01-18 06:32:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:32:06,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:06,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:06,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:32:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 06:32:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:06,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:07,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244569924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:07,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:07,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 06:32:07,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61805475] [2022-01-18 06:32:07,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:32:07,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:32:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:32:07,499 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:08,208 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-01-18 06:32:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:32:08,208 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:32:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:08,210 INFO L225 Difference]: With dead ends: 234 [2022-01-18 06:32:08,210 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 06:32:08,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:32:08,211 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:08,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 89 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:32:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 06:32:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 128. [2022-01-18 06:32:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-01-18 06:32:08,220 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-01-18 06:32:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-01-18 06:32:08,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-01-18 06:32:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:32:08,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:08,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:08,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:08,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2022-01-18 06:32:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318422609] [2022-01-18 06:32:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:08,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:08,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:08,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318422609] [2022-01-18 06:32:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318422609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:08,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50029025] [2022-01-18 06:32:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:32:08,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:08,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:08,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:32:08,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:32:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 06:32:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:09,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:09,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50029025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:09,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:09,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-18 06:32:09,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702214524] [2022-01-18 06:32:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:09,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:32:09,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:32:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:32:09,527 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:10,483 INFO L93 Difference]: Finished difference Result 294 states and 585 transitions. [2022-01-18 06:32:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:32:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:32:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:10,485 INFO L225 Difference]: With dead ends: 294 [2022-01-18 06:32:10,485 INFO L226 Difference]: Without dead ends: 236 [2022-01-18 06:32:10,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:32:10,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:10,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:32:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-18 06:32:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-01-18 06:32:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0839160839160837) internal successors, (298), 143 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 298 transitions. [2022-01-18 06:32:10,491 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 298 transitions. Word has length 22 [2022-01-18 06:32:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:10,492 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 298 transitions. [2022-01-18 06:32:10,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 298 transitions. [2022-01-18 06:32:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:32:10,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:10,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:10,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:10,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:10,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2022-01-18 06:32:10,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:10,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789425144] [2022-01-18 06:32:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:10,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:32:10,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789425144] [2022-01-18 06:32:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789425144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378743787] [2022-01-18 06:32:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:32:10,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:10,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:10,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:32:10,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:32:10,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:32:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:11,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:12,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378743787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:12,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:12,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-01-18 06:32:12,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349997702] [2022-01-18 06:32:12,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:12,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:32:12,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:12,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:32:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:32:12,107 INFO L87 Difference]: Start difference. First operand 144 states and 298 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:13,124 INFO L93 Difference]: Finished difference Result 270 states and 507 transitions. [2022-01-18 06:32:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:32:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:32:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:13,125 INFO L225 Difference]: With dead ends: 270 [2022-01-18 06:32:13,126 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 06:32:13,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 06:32:13,127 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:13,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 234 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:32:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 06:32:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-01-18 06:32:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.037037037037037) internal successors, (330), 162 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 330 transitions. [2022-01-18 06:32:13,132 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 330 transitions. Word has length 24 [2022-01-18 06:32:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:13,133 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 330 transitions. [2022-01-18 06:32:13,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 330 transitions. [2022-01-18 06:32:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:32:13,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:13,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:13,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:13,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 06:32:13,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2022-01-18 06:32:13,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553600271] [2022-01-18 06:32:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:13,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:32:13,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553600271] [2022-01-18 06:32:13,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553600271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882822167] [2022-01-18 06:32:13,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:32:13,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:13,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:13,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:32:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:13,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:32:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:32:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:14,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:14,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882822167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:14,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:14,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-01-18 06:32:14,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182914420] [2022-01-18 06:32:14,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:14,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:32:14,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:32:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:32:14,699 INFO L87 Difference]: Start difference. First operand 163 states and 330 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:16,151 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2022-01-18 06:32:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:32:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:32:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:16,152 INFO L225 Difference]: With dead ends: 270 [2022-01-18 06:32:16,152 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 06:32:16,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:32:16,153 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:16,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 164 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:32:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 06:32:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2022-01-18 06:32:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.03680981595092) internal successors, (332), 163 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 332 transitions. [2022-01-18 06:32:16,158 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 332 transitions. Word has length 24 [2022-01-18 06:32:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:16,158 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 332 transitions. [2022-01-18 06:32:16,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 332 transitions. [2022-01-18 06:32:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:32:16,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:16,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:16,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:16,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:16,367 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 11 times [2022-01-18 06:32:16,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:16,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877883136] [2022-01-18 06:32:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:16,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:16,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877883136] [2022-01-18 06:32:16,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877883136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519814678] [2022-01-18 06:32:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:32:16,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:16,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:16,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:32:16,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:32:16,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:32:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:17,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:17,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519814678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:17,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:17,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 06:32:17,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312887058] [2022-01-18 06:32:17,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:17,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:32:17,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:32:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:32:17,992 INFO L87 Difference]: Start difference. First operand 164 states and 332 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:20,990 INFO L93 Difference]: Finished difference Result 366 states and 702 transitions. [2022-01-18 06:32:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:32:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:32:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:20,994 INFO L225 Difference]: With dead ends: 366 [2022-01-18 06:32:20,995 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 06:32:20,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:32:20,997 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:20,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 195 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:32:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 06:32:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-01-18 06:32:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0418848167539267) internal successors, (390), 191 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 390 transitions. [2022-01-18 06:32:21,003 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 390 transitions. Word has length 24 [2022-01-18 06:32:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:21,005 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 390 transitions. [2022-01-18 06:32:21,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 390 transitions. [2022-01-18 06:32:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:32:21,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:21,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:21,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:21,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 06:32:21,221 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2130799989, now seen corresponding path program 12 times [2022-01-18 06:32:21,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789117582] [2022-01-18 06:32:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:21,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:21,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:21,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789117582] [2022-01-18 06:32:21,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789117582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:21,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246901056] [2022-01-18 06:32:21,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:32:21,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:21,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:21,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:32:21,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:32:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:32:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:21,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:22,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246901056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:22,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:22,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 06:32:22,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611540080] [2022-01-18 06:32:22,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:22,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:32:22,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:32:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:32:22,708 INFO L87 Difference]: Start difference. First operand 192 states and 390 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:23,406 INFO L93 Difference]: Finished difference Result 272 states and 544 transitions. [2022-01-18 06:32:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:32:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:32:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:23,408 INFO L225 Difference]: With dead ends: 272 [2022-01-18 06:32:23,408 INFO L226 Difference]: Without dead ends: 246 [2022-01-18 06:32:23,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:32:23,409 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 91 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:32:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-18 06:32:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 165. [2022-01-18 06:32:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.048780487804878) internal successors, (336), 164 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 336 transitions. [2022-01-18 06:32:23,413 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 336 transitions. Word has length 24 [2022-01-18 06:32:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:23,413 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 336 transitions. [2022-01-18 06:32:23,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 336 transitions. [2022-01-18 06:32:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:23,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:23,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:23,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:23,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:32:23,635 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 13 times [2022-01-18 06:32:23,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523547133] [2022-01-18 06:32:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:23,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:23,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:23,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523547133] [2022-01-18 06:32:23,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523547133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:23,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035203088] [2022-01-18 06:32:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:32:23,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:23,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:23,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:32:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:32:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:24,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:25,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035203088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:25,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:25,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-01-18 06:32:25,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679772473] [2022-01-18 06:32:25,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:25,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:32:25,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:32:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:32:25,201 INFO L87 Difference]: Start difference. First operand 165 states and 336 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:29,834 INFO L93 Difference]: Finished difference Result 651 states and 1266 transitions. [2022-01-18 06:32:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 06:32:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:29,837 INFO L225 Difference]: With dead ends: 651 [2022-01-18 06:32:29,837 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 06:32:29,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5895 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2834, Invalid=12666, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 06:32:29,841 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:29,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 299 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:32:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 06:32:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 248. [2022-01-18 06:32:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.145748987854251) internal successors, (530), 247 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 530 transitions. [2022-01-18 06:32:29,849 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 530 transitions. Word has length 27 [2022-01-18 06:32:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:29,849 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 530 transitions. [2022-01-18 06:32:29,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 530 transitions. [2022-01-18 06:32:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:29,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:29,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:29,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:30,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:32:30,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 14 times [2022-01-18 06:32:30,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:30,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700575006] [2022-01-18 06:32:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:30,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:30,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:30,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700575006] [2022-01-18 06:32:30,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700575006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:30,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487631930] [2022-01-18 06:32:30,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:32:30,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:30,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:30,275 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:30,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:32:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:32:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:32:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:30,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487631930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:31,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:31,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 06:32:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914553650] [2022-01-18 06:32:31,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:32:31,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:32:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:32:31,552 INFO L87 Difference]: Start difference. First operand 248 states and 530 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:35,760 INFO L93 Difference]: Finished difference Result 688 states and 1359 transitions. [2022-01-18 06:32:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 06:32:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:35,763 INFO L225 Difference]: With dead ends: 688 [2022-01-18 06:32:35,763 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 06:32:35,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3106, Invalid=15526, Unknown=0, NotChecked=0, Total=18632 [2022-01-18 06:32:35,765 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:35,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 275 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:32:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 06:32:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 274. [2022-01-18 06:32:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1684981684981683) internal successors, (592), 273 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 592 transitions. [2022-01-18 06:32:35,774 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 592 transitions. Word has length 27 [2022-01-18 06:32:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:35,774 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 592 transitions. [2022-01-18 06:32:35,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 592 transitions. [2022-01-18 06:32:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:35,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:35,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:35,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 06:32:35,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 06:32:35,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 15 times [2022-01-18 06:32:35,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:35,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942774919] [2022-01-18 06:32:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:35,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:36,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942774919] [2022-01-18 06:32:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942774919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883394425] [2022-01-18 06:32:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:32:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:36,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:36,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:32:36,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:32:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:32:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:37,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883394425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:37,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:37,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 06:32:37,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790858668] [2022-01-18 06:32:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:37,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:32:37,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:32:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:32:37,421 INFO L87 Difference]: Start difference. First operand 274 states and 592 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:41,627 INFO L93 Difference]: Finished difference Result 717 states and 1446 transitions. [2022-01-18 06:32:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:32:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:41,630 INFO L225 Difference]: With dead ends: 717 [2022-01-18 06:32:41,630 INFO L226 Difference]: Without dead ends: 659 [2022-01-18 06:32:41,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6823 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3101, Invalid=15805, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 06:32:41,632 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 614 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:41,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 261 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:32:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-18 06:32:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 305. [2022-01-18 06:32:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.2072368421052633) internal successors, (671), 304 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 671 transitions. [2022-01-18 06:32:41,642 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 671 transitions. Word has length 27 [2022-01-18 06:32:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:41,642 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 671 transitions. [2022-01-18 06:32:41,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 671 transitions. [2022-01-18 06:32:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:41,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:41,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:41,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:41,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:41,867 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 16 times [2022-01-18 06:32:41,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:41,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323833304] [2022-01-18 06:32:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:41,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:42,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323833304] [2022-01-18 06:32:42,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323833304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099874953] [2022-01-18 06:32:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:32:42,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:42,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:42,060 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:42,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:32:42,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:32:42,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:32:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:42,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099874953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:43,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:43,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-01-18 06:32:43,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810184359] [2022-01-18 06:32:43,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:32:43,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:32:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:32:43,113 INFO L87 Difference]: Start difference. First operand 305 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:48,983 INFO L93 Difference]: Finished difference Result 852 states and 1700 transitions. [2022-01-18 06:32:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 06:32:48,987 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:48,990 INFO L225 Difference]: With dead ends: 852 [2022-01-18 06:32:48,990 INFO L226 Difference]: Without dead ends: 750 [2022-01-18 06:32:48,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4461, Invalid=25295, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 06:32:48,992 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 708 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 367 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:32:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-18 06:32:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 303. [2022-01-18 06:32:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2019867549668874) internal successors, (665), 302 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 665 transitions. [2022-01-18 06:32:49,002 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 665 transitions. Word has length 27 [2022-01-18 06:32:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:49,002 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 665 transitions. [2022-01-18 06:32:49,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 665 transitions. [2022-01-18 06:32:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:49,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:49,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:49,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:49,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:32:49,220 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 17 times [2022-01-18 06:32:49,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:49,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73415869] [2022-01-18 06:32:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:49,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:49,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73415869] [2022-01-18 06:32:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73415869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954143146] [2022-01-18 06:32:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:32:49,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:49,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:49,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:32:49,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:32:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:32:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:49,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954143146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:50,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:50,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-01-18 06:32:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930736910] [2022-01-18 06:32:50,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:32:50,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:32:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:32:50,469 INFO L87 Difference]: Start difference. First operand 303 states and 665 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:54,367 INFO L93 Difference]: Finished difference Result 798 states and 1598 transitions. [2022-01-18 06:32:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 06:32:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:54,369 INFO L225 Difference]: With dead ends: 798 [2022-01-18 06:32:54,369 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 06:32:54,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2627, Invalid=13885, Unknown=0, NotChecked=0, Total=16512 [2022-01-18 06:32:54,371 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 647 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:54,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 268 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:32:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 06:32:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 333. [2022-01-18 06:32:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-01-18 06:32:54,380 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-01-18 06:32:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:54,381 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-01-18 06:32:54,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-01-18 06:32:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:54,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:54,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:54,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:54,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 18 times [2022-01-18 06:32:54,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:54,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559984444] [2022-01-18 06:32:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:54,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:54,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559984444] [2022-01-18 06:32:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559984444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353847897] [2022-01-18 06:32:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:32:54,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:54,783 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:54,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:32:54,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:32:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:32:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:32:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:55,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:32:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:55,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353847897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:32:55,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:32:55,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 06:32:55,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961510792] [2022-01-18 06:32:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:32:55,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:32:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:32:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:32:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:32:55,993 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:32:59,021 INFO L93 Difference]: Finished difference Result 716 states and 1447 transitions. [2022-01-18 06:32:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 06:32:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:32:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:32:59,025 INFO L225 Difference]: With dead ends: 716 [2022-01-18 06:32:59,026 INFO L226 Difference]: Without dead ends: 620 [2022-01-18 06:32:59,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1995, Invalid=9135, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 06:32:59,027 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 466 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:32:59,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 236 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:32:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-18 06:32:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 333. [2022-01-18 06:32:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-01-18 06:32:59,036 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-01-18 06:32:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:32:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-01-18 06:32:59,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:32:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-01-18 06:32:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:32:59,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:32:59,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:32:59,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:32:59,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:59,247 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:32:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:32:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 19 times [2022-01-18 06:32:59,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:32:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108018684] [2022-01-18 06:32:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:32:59,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:32:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:59,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:32:59,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108018684] [2022-01-18 06:32:59,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108018684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:32:59,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992075536] [2022-01-18 06:32:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:32:59,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:32:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:32:59,437 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:32:59,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:32:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:32:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:32:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:32:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:32:59,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:00,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992075536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:00,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:00,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 06:33:00,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745419179] [2022-01-18 06:33:00,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:00,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:33:00,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:33:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:33:00,650 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:04,034 INFO L93 Difference]: Finished difference Result 829 states and 1722 transitions. [2022-01-18 06:33:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 06:33:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:04,036 INFO L225 Difference]: With dead ends: 829 [2022-01-18 06:33:04,036 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 06:33:04,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2169, Invalid=10263, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 06:33:04,038 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:04,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 273 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:33:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 06:33:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 413. [2022-01-18 06:33:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.25) internal successors, (927), 412 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 927 transitions. [2022-01-18 06:33:04,048 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 927 transitions. Word has length 27 [2022-01-18 06:33:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:04,048 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 927 transitions. [2022-01-18 06:33:04,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 927 transitions. [2022-01-18 06:33:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:04,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:04,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:04,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:04,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:04,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 20 times [2022-01-18 06:33:04,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:04,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855849610] [2022-01-18 06:33:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:04,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855849610] [2022-01-18 06:33:04,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855849610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568494663] [2022-01-18 06:33:04,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:33:04,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:04,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:04,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:33:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:33:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:33:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:05,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568494663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:05,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:05,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-01-18 06:33:05,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538942910] [2022-01-18 06:33:05,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:05,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:33:05,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:33:05,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:33:05,634 INFO L87 Difference]: Start difference. First operand 413 states and 927 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:10,645 INFO L93 Difference]: Finished difference Result 887 states and 1850 transitions. [2022-01-18 06:33:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-18 06:33:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:10,648 INFO L225 Difference]: With dead ends: 887 [2022-01-18 06:33:10,649 INFO L226 Difference]: Without dead ends: 771 [2022-01-18 06:33:10,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6515 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3071, Invalid=15835, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 06:33:10,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 633 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:10,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 224 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:33:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-18 06:33:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 423. [2022-01-18 06:33:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2369668246445498) internal successors, (944), 422 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 944 transitions. [2022-01-18 06:33:10,661 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 944 transitions. Word has length 27 [2022-01-18 06:33:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:10,661 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 944 transitions. [2022-01-18 06:33:10,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 944 transitions. [2022-01-18 06:33:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:10,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:10,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:10,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 06:33:10,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:10,884 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:10,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 21 times [2022-01-18 06:33:10,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:10,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321864955] [2022-01-18 06:33:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:10,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:11,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321864955] [2022-01-18 06:33:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321864955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109803569] [2022-01-18 06:33:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:33:11,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:11,066 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:11,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:33:11,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:33:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:33:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:11,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109803569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:12,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:12,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 06:33:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895552119] [2022-01-18 06:33:12,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:33:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:33:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:33:12,212 INFO L87 Difference]: Start difference. First operand 423 states and 944 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:15,380 INFO L93 Difference]: Finished difference Result 816 states and 1693 transitions. [2022-01-18 06:33:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:33:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:15,384 INFO L225 Difference]: With dead ends: 816 [2022-01-18 06:33:15,384 INFO L226 Difference]: Without dead ends: 720 [2022-01-18 06:33:15,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2270, Invalid=9940, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 06:33:15,385 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 452 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:15,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 235 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:33:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-18 06:33:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 377. [2022-01-18 06:33:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.223404255319149) internal successors, (836), 376 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 836 transitions. [2022-01-18 06:33:15,394 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 836 transitions. Word has length 27 [2022-01-18 06:33:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:15,395 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 836 transitions. [2022-01-18 06:33:15,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 836 transitions. [2022-01-18 06:33:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:15,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:15,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:15,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:15,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 06:33:15,617 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 22 times [2022-01-18 06:33:15,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:15,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50096896] [2022-01-18 06:33:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:15,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:15,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50096896] [2022-01-18 06:33:15,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50096896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705388652] [2022-01-18 06:33:15,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:33:15,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:15,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:15,833 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:33:15,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:33:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:33:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:17,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705388652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:17,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:17,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 06:33:17,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688993385] [2022-01-18 06:33:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:17,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:33:17,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:33:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:33:17,086 INFO L87 Difference]: Start difference. First operand 377 states and 836 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:22,283 INFO L93 Difference]: Finished difference Result 932 states and 1908 transitions. [2022-01-18 06:33:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:33:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:22,286 INFO L225 Difference]: With dead ends: 932 [2022-01-18 06:33:22,286 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 06:33:22,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3006, Invalid=13250, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 06:33:22,287 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:22,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 265 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:33:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 06:33:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 422. [2022-01-18 06:33:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.2327790973871733) internal successors, (940), 421 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 940 transitions. [2022-01-18 06:33:22,295 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 940 transitions. Word has length 27 [2022-01-18 06:33:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 940 transitions. [2022-01-18 06:33:22,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 940 transitions. [2022-01-18 06:33:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:22,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:22,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:22,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 06:33:22,510 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:22,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 23 times [2022-01-18 06:33:22,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914043065] [2022-01-18 06:33:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:22,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:22,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914043065] [2022-01-18 06:33:22,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914043065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179623834] [2022-01-18 06:33:22,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:33:22,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:22,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:22,688 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:33:22,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:33:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:33:22,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:23,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179623834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:24,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:24,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 06:33:24,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118119409] [2022-01-18 06:33:24,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:24,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:33:24,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:33:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:33:24,047 INFO L87 Difference]: Start difference. First operand 422 states and 940 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:30,057 INFO L93 Difference]: Finished difference Result 1266 states and 2595 transitions. [2022-01-18 06:33:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 06:33:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:30,062 INFO L225 Difference]: With dead ends: 1266 [2022-01-18 06:33:30,062 INFO L226 Difference]: Without dead ends: 1245 [2022-01-18 06:33:30,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6389 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3474, Invalid=14082, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 06:33:30,064 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 537 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:30,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 337 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:33:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-01-18 06:33:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 543. [2022-01-18 06:33:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.274907749077491) internal successors, (1233), 542 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1233 transitions. [2022-01-18 06:33:30,078 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1233 transitions. Word has length 27 [2022-01-18 06:33:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1233 transitions. [2022-01-18 06:33:30,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1233 transitions. [2022-01-18 06:33:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:30,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:30,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:30,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:30,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:30,303 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 24 times [2022-01-18 06:33:30,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103255215] [2022-01-18 06:33:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:30,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:30,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:30,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103255215] [2022-01-18 06:33:30,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103255215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:30,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813921261] [2022-01-18 06:33:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:33:30,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:30,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:30,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:33:30,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:33:30,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:30,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:33:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:30,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:31,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813921261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:31,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:31,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 06:33:31,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438702635] [2022-01-18 06:33:31,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:31,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:33:31,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:33:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:33:31,627 INFO L87 Difference]: Start difference. First operand 543 states and 1233 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:39,804 INFO L93 Difference]: Finished difference Result 1451 states and 3008 transitions. [2022-01-18 06:33:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 06:33:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:39,808 INFO L225 Difference]: With dead ends: 1451 [2022-01-18 06:33:39,808 INFO L226 Difference]: Without dead ends: 1380 [2022-01-18 06:33:39,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12620 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5319, Invalid=27261, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 06:33:39,810 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 594 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:39,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 471 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:33:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-01-18 06:33:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 579. [2022-01-18 06:33:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.282006920415225) internal successors, (1319), 578 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1319 transitions. [2022-01-18 06:33:39,824 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1319 transitions. Word has length 27 [2022-01-18 06:33:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:39,825 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1319 transitions. [2022-01-18 06:33:39,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1319 transitions. [2022-01-18 06:33:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:39,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:39,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:39,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:40,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:40,039 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 25 times [2022-01-18 06:33:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536256403] [2022-01-18 06:33:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:40,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:40,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536256403] [2022-01-18 06:33:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536256403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933217424] [2022-01-18 06:33:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:33:40,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:40,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:33:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:33:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:40,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:41,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933217424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:41,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:41,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-01-18 06:33:41,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964721477] [2022-01-18 06:33:41,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:41,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:33:41,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:33:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:33:41,384 INFO L87 Difference]: Start difference. First operand 579 states and 1319 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:49,906 INFO L93 Difference]: Finished difference Result 1709 states and 3584 transitions. [2022-01-18 06:33:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 06:33:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:49,910 INFO L225 Difference]: With dead ends: 1709 [2022-01-18 06:33:49,910 INFO L226 Difference]: Without dead ends: 1641 [2022-01-18 06:33:49,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12214 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5391, Invalid=25409, Unknown=0, NotChecked=0, Total=30800 [2022-01-18 06:33:49,912 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 561 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:49,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 446 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:33:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-01-18 06:33:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 724. [2022-01-18 06:33:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2835408022130013) internal successors, (1651), 723 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1651 transitions. [2022-01-18 06:33:49,928 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1651 transitions. Word has length 27 [2022-01-18 06:33:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1651 transitions. [2022-01-18 06:33:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1651 transitions. [2022-01-18 06:33:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:49,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:49,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:49,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:33:50,147 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 26 times [2022-01-18 06:33:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989604381] [2022-01-18 06:33:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:50,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:33:50,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989604381] [2022-01-18 06:33:50,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989604381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218371381] [2022-01-18 06:33:50,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:33:50,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:50,333 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:33:50,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:33:50,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:33:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:50,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:51,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218371381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:51,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:51,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 06:33:51,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502056857] [2022-01-18 06:33:51,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:51,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:33:51,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:33:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:33:51,545 INFO L87 Difference]: Start difference. First operand 724 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:54,753 INFO L93 Difference]: Finished difference Result 1358 states and 2916 transitions. [2022-01-18 06:33:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 06:33:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:54,757 INFO L225 Difference]: With dead ends: 1358 [2022-01-18 06:33:54,757 INFO L226 Difference]: Without dead ends: 1293 [2022-01-18 06:33:54,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 06:33:54,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 463 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:54,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 302 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:33:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-18 06:33:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 833. [2022-01-18 06:33:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.293269230769231) internal successors, (1908), 832 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1908 transitions. [2022-01-18 06:33:54,775 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1908 transitions. Word has length 27 [2022-01-18 06:33:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:54,775 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1908 transitions. [2022-01-18 06:33:54,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1908 transitions. [2022-01-18 06:33:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:54,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:54,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:54,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:54,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:33:54,991 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 27 times [2022-01-18 06:33:54,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:54,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980024376] [2022-01-18 06:33:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:54,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:33:55,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980024376] [2022-01-18 06:33:55,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980024376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624624796] [2022-01-18 06:33:55,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:33:55,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:55,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:55,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:33:55,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:33:55,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:33:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:33:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:55,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:33:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:33:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624624796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:33:56,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:33:56,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-01-18 06:33:56,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222440178] [2022-01-18 06:33:56,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:33:56,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:33:56,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:33:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:33:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:33:56,286 INFO L87 Difference]: Start difference. First operand 833 states and 1908 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:33:59,265 INFO L93 Difference]: Finished difference Result 1227 states and 2641 transitions. [2022-01-18 06:33:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 06:33:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:33:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:33:59,268 INFO L225 Difference]: With dead ends: 1227 [2022-01-18 06:33:59,268 INFO L226 Difference]: Without dead ends: 1213 [2022-01-18 06:33:59,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1752, Invalid=8348, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 06:33:59,269 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 502 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:33:59,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 219 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:33:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-18 06:33:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 859. [2022-01-18 06:33:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.296037296037296) internal successors, (1970), 858 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1970 transitions. [2022-01-18 06:33:59,284 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1970 transitions. Word has length 27 [2022-01-18 06:33:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:33:59,284 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1970 transitions. [2022-01-18 06:33:59,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:33:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1970 transitions. [2022-01-18 06:33:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:33:59,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:33:59,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:33:59,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:33:59,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:33:59,508 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:33:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:33:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 28 times [2022-01-18 06:33:59,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:33:59,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116811180] [2022-01-18 06:33:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:33:59,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:33:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:33:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:33:59,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:33:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116811180] [2022-01-18 06:33:59,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116811180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:33:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199991014] [2022-01-18 06:33:59,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:33:59,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:33:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:33:59,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:33:59,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:33:59,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:33:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:33:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:33:59,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:00,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199991014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:00,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:00,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 06:34:00,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719850200] [2022-01-18 06:34:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:00,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:34:00,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:34:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:34:00,788 INFO L87 Difference]: Start difference. First operand 859 states and 1970 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:05,573 INFO L93 Difference]: Finished difference Result 1463 states and 3165 transitions. [2022-01-18 06:34:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 06:34:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:05,577 INFO L225 Difference]: With dead ends: 1463 [2022-01-18 06:34:05,577 INFO L226 Difference]: Without dead ends: 1361 [2022-01-18 06:34:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2835, Invalid=14987, Unknown=0, NotChecked=0, Total=17822 [2022-01-18 06:34:05,579 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 686 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:05,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 297 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:34:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-18 06:34:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 857. [2022-01-18 06:34:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.294392523364486) internal successors, (1964), 856 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1964 transitions. [2022-01-18 06:34:05,594 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1964 transitions. Word has length 27 [2022-01-18 06:34:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1964 transitions. [2022-01-18 06:34:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1964 transitions. [2022-01-18 06:34:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:05,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:05,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:05,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:05,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 29 times [2022-01-18 06:34:05,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:05,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483797224] [2022-01-18 06:34:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:05,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:34:05,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483797224] [2022-01-18 06:34:05,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483797224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:05,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199605662] [2022-01-18 06:34:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:34:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:05,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:34:06,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:34:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:34:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:06,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199605662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:07,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-01-18 06:34:07,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967164461] [2022-01-18 06:34:07,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:07,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:34:07,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:34:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:34:07,212 INFO L87 Difference]: Start difference. First operand 857 states and 1964 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:10,457 INFO L93 Difference]: Finished difference Result 1458 states and 3123 transitions. [2022-01-18 06:34:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:34:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:10,461 INFO L225 Difference]: With dead ends: 1458 [2022-01-18 06:34:10,461 INFO L226 Difference]: Without dead ends: 1400 [2022-01-18 06:34:10,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1851, Invalid=8451, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:34:10,463 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 366 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:10,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 262 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:34:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-01-18 06:34:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 888. [2022-01-18 06:34:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.2953776775648254) internal successors, (2036), 887 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2036 transitions. [2022-01-18 06:34:10,477 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2036 transitions. Word has length 27 [2022-01-18 06:34:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2036 transitions. [2022-01-18 06:34:10,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2036 transitions. [2022-01-18 06:34:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:10,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:10,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:10,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 06:34:10,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:10,710 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:10,710 INFO L85 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 30 times [2022-01-18 06:34:10,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:10,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690772501] [2022-01-18 06:34:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:10,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:34:10,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690772501] [2022-01-18 06:34:10,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690772501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320196479] [2022-01-18 06:34:10,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:34:10,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:10,886 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:10,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:34:10,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:34:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:34:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:11,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320196479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:12,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:12,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 06:34:12,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809676507] [2022-01-18 06:34:12,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:12,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:34:12,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:34:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:34:12,038 INFO L87 Difference]: Start difference. First operand 888 states and 2036 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:16,555 INFO L93 Difference]: Finished difference Result 1565 states and 3427 transitions. [2022-01-18 06:34:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 06:34:16,555 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:16,560 INFO L225 Difference]: With dead ends: 1565 [2022-01-18 06:34:16,560 INFO L226 Difference]: Without dead ends: 1463 [2022-01-18 06:34:16,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2608, Invalid=13394, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 06:34:16,562 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 607 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:16,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 219 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:34:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-01-18 06:34:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 915. [2022-01-18 06:34:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.2964989059080962) internal successors, (2099), 914 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2099 transitions. [2022-01-18 06:34:16,578 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2099 transitions. Word has length 27 [2022-01-18 06:34:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:16,578 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2099 transitions. [2022-01-18 06:34:16,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2099 transitions. [2022-01-18 06:34:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:16,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:16,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:16,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:16,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:16,799 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 31 times [2022-01-18 06:34:16,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671209395] [2022-01-18 06:34:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:34:16,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671209395] [2022-01-18 06:34:16,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671209395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693050597] [2022-01-18 06:34:16,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:34:16,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:16,956 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:16,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:34:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:34:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:17,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:18,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693050597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:18,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:18,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-01-18 06:34:18,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998648254] [2022-01-18 06:34:18,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:18,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:34:18,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:34:18,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:34:18,114 INFO L87 Difference]: Start difference. First operand 915 states and 2099 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:22,282 INFO L93 Difference]: Finished difference Result 1839 states and 4025 transitions. [2022-01-18 06:34:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 06:34:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:22,288 INFO L225 Difference]: With dead ends: 1839 [2022-01-18 06:34:22,288 INFO L226 Difference]: Without dead ends: 1743 [2022-01-18 06:34:22,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2389, Invalid=10721, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 06:34:22,289 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 458 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:22,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 253 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:34:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-01-18 06:34:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 932. [2022-01-18 06:34:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.297529538131042) internal successors, (2139), 931 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2139 transitions. [2022-01-18 06:34:22,309 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2139 transitions. Word has length 27 [2022-01-18 06:34:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:22,309 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2139 transitions. [2022-01-18 06:34:22,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2139 transitions. [2022-01-18 06:34:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:22,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:22,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:22,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 06:34:22,523 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash -198928785, now seen corresponding path program 32 times [2022-01-18 06:34:22,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227057906] [2022-01-18 06:34:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:22,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:22,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227057906] [2022-01-18 06:34:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227057906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12504857] [2022-01-18 06:34:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:34:22,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:22,704 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:22,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:34:22,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:34:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:34:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:23,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:23,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12504857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:23,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:23,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 06:34:23,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808474924] [2022-01-18 06:34:23,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:23,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:34:23,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:34:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:34:23,909 INFO L87 Difference]: Start difference. First operand 932 states and 2139 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:28,774 INFO L93 Difference]: Finished difference Result 1851 states and 3994 transitions. [2022-01-18 06:34:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-18 06:34:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:28,777 INFO L225 Difference]: With dead ends: 1851 [2022-01-18 06:34:28,777 INFO L226 Difference]: Without dead ends: 1783 [2022-01-18 06:34:28,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2998, Invalid=14558, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 06:34:28,778 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 542 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:28,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 459 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:34:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-01-18 06:34:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1050. [2022-01-18 06:34:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.3040991420400383) internal successors, (2417), 1049 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2417 transitions. [2022-01-18 06:34:28,796 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2417 transitions. Word has length 27 [2022-01-18 06:34:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:28,796 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2417 transitions. [2022-01-18 06:34:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2417 transitions. [2022-01-18 06:34:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:28,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:28,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:28,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 06:34:29,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:29,015 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 33 times [2022-01-18 06:34:29,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926031377] [2022-01-18 06:34:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:29,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:29,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926031377] [2022-01-18 06:34:29,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926031377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807712740] [2022-01-18 06:34:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:34:29,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:29,178 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:29,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:34:29,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:34:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:34:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:29,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:30,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807712740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:30,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:30,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-01-18 06:34:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415482452] [2022-01-18 06:34:30,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:34:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:34:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:34:30,303 INFO L87 Difference]: Start difference. First operand 1050 states and 2417 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:35,495 INFO L93 Difference]: Finished difference Result 1673 states and 3668 transitions. [2022-01-18 06:34:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 06:34:35,496 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:35,498 INFO L225 Difference]: With dead ends: 1673 [2022-01-18 06:34:35,498 INFO L226 Difference]: Without dead ends: 1653 [2022-01-18 06:34:35,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3318, Invalid=15864, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 06:34:35,499 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 491 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:35,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 369 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:34:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-01-18 06:34:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1055. [2022-01-18 06:34:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3026565464895636) internal successors, (2427), 1054 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2427 transitions. [2022-01-18 06:34:35,516 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2427 transitions. Word has length 27 [2022-01-18 06:34:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:35,516 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2427 transitions. [2022-01-18 06:34:35,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2427 transitions. [2022-01-18 06:34:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:35,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:35,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:35,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:35,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:35,718 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 34 times [2022-01-18 06:34:35,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:35,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725503470] [2022-01-18 06:34:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:35,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:35,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725503470] [2022-01-18 06:34:35,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725503470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617257657] [2022-01-18 06:34:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:34:35,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:35,889 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:35,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:34:35,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:34:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:34:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:36,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:37,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617257657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:37,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:37,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-01-18 06:34:37,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742901842] [2022-01-18 06:34:37,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:37,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:34:37,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:34:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:34:37,040 INFO L87 Difference]: Start difference. First operand 1055 states and 2427 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:41,236 INFO L93 Difference]: Finished difference Result 1976 states and 4378 transitions. [2022-01-18 06:34:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 06:34:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-01-18 06:34:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:41,239 INFO L225 Difference]: With dead ends: 1976 [2022-01-18 06:34:41,239 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 06:34:41,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2716, Invalid=13286, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 06:34:41,241 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:41,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 402 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:34:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 06:34:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1050. [2022-01-18 06:34:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.296472831267874) internal successors, (2409), 1049 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2409 transitions. [2022-01-18 06:34:41,259 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2409 transitions. Word has length 27 [2022-01-18 06:34:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:41,259 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2409 transitions. [2022-01-18 06:34:41,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2409 transitions. [2022-01-18 06:34:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:41,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:41,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:41,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 06:34:41,461 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 35 times [2022-01-18 06:34:41,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556023235] [2022-01-18 06:34:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:41,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:41,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556023235] [2022-01-18 06:34:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556023235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471432261] [2022-01-18 06:34:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:34:41,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:41,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:41,654 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:34:41,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:34:41,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:41,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:34:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:42,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:42,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471432261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:42,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:42,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 06:34:42,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25931396] [2022-01-18 06:34:42,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:42,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:34:42,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:34:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:34:42,861 INFO L87 Difference]: Start difference. First operand 1050 states and 2409 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-01-18 06:34:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:46,859 INFO L93 Difference]: Finished difference Result 1991 states and 4278 transitions. [2022-01-18 06:34:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 06:34:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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 27 [2022-01-18 06:34:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:46,867 INFO L225 Difference]: With dead ends: 1991 [2022-01-18 06:34:46,867 INFO L226 Difference]: Without dead ends: 1916 [2022-01-18 06:34:46,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2234, Invalid=10198, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 06:34:46,868 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:46,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 482 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:34:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-01-18 06:34:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1300. [2022-01-18 06:34:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.311008468052348) internal successors, (3002), 1299 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3002 transitions. [2022-01-18 06:34:46,896 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3002 transitions. Word has length 27 [2022-01-18 06:34:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:46,896 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3002 transitions. [2022-01-18 06:34:46,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-01-18 06:34:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3002 transitions. [2022-01-18 06:34:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:46,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:46,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:34:47,098 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 36 times [2022-01-18 06:34:47,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994932583] [2022-01-18 06:34:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:47,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:47,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994932583] [2022-01-18 06:34:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994932583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782246394] [2022-01-18 06:34:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:34:47,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:47,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:47,302 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:47,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:34:47,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:34:47,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:34:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:47,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:48,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782246394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:48,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:48,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 06:34:48,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879630452] [2022-01-18 06:34:48,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:48,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:34:48,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:34:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:34:48,426 INFO L87 Difference]: Start difference. First operand 1300 states and 3002 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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) [2022-01-18 06:34:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:52,932 INFO L93 Difference]: Finished difference Result 2024 states and 4411 transitions. [2022-01-18 06:34:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:34:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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 27 [2022-01-18 06:34:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:52,936 INFO L225 Difference]: With dead ends: 2024 [2022-01-18 06:34:52,936 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 06:34:52,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2873, Invalid=14683, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 06:34:52,937 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 583 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:52,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 469 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:34:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 06:34:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1238. [2022-01-18 06:34:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.320129345189976) internal successors, (2870), 1237 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2870 transitions. [2022-01-18 06:34:52,954 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2870 transitions. Word has length 27 [2022-01-18 06:34:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:52,954 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2870 transitions. [2022-01-18 06:34:52,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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) [2022-01-18 06:34:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2870 transitions. [2022-01-18 06:34:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:52,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:52,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:52,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 06:34:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 06:34:53,157 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 37 times [2022-01-18 06:34:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:53,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000295884] [2022-01-18 06:34:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:53,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:53,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000295884] [2022-01-18 06:34:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000295884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900563619] [2022-01-18 06:34:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:34:53,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:53,338 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:53,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:34:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:34:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:34:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:53,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:34:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:54,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900563619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:34:54,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:34:54,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-01-18 06:34:54,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383650398] [2022-01-18 06:34:54,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:34:54,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 06:34:54,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:34:54,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 06:34:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:34:54,434 INFO L87 Difference]: Start difference. First operand 1238 states and 2870 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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) [2022-01-18 06:34:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:34:59,475 INFO L93 Difference]: Finished difference Result 2027 states and 4488 transitions. [2022-01-18 06:34:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 06:34:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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 27 [2022-01-18 06:34:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:34:59,479 INFO L225 Difference]: With dead ends: 2027 [2022-01-18 06:34:59,479 INFO L226 Difference]: Without dead ends: 1956 [2022-01-18 06:34:59,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3164, Invalid=16576, Unknown=0, NotChecked=0, Total=19740 [2022-01-18 06:34:59,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 589 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:34:59,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 376 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:34:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-01-18 06:34:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1210. [2022-01-18 06:34:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.3118279569892475) internal successors, (2795), 1209 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:34:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2795 transitions. [2022-01-18 06:34:59,503 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2795 transitions. Word has length 27 [2022-01-18 06:34:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:34:59,504 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2795 transitions. [2022-01-18 06:34:59,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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) [2022-01-18 06:34:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2795 transitions. [2022-01-18 06:34:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:34:59,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:34:59,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:34:59,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 06:34:59,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:34:59,727 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:34:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:34:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 38 times [2022-01-18 06:34:59,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:34:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419885] [2022-01-18 06:34:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:34:59,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:34:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:34:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:34:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:34:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419885] [2022-01-18 06:34:59,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:34:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166447343] [2022-01-18 06:34:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:34:59,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:34:59,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:34:59,909 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:34:59,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:34:59,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:34:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:34:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:34:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:00,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:01,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166447343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:01,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:01,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 06:35:01,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381729178] [2022-01-18 06:35:01,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:01,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 06:35:01,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 06:35:01,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:35:01,039 INFO L87 Difference]: Start difference. First operand 1210 states and 2795 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:04,217 INFO L93 Difference]: Finished difference Result 1819 states and 4016 transitions. [2022-01-18 06:35:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 06:35:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2022-01-18 06:35:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:04,220 INFO L225 Difference]: With dead ends: 1819 [2022-01-18 06:35:04,220 INFO L226 Difference]: Without dead ends: 1761 [2022-01-18 06:35:04,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1688, Invalid=6868, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:35:04,221 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 406 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 413 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:35:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-01-18 06:35:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1251. [2022-01-18 06:35:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.3112) internal successors, (2889), 1250 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2889 transitions. [2022-01-18 06:35:04,242 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2889 transitions. Word has length 27 [2022-01-18 06:35:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2889 transitions. [2022-01-18 06:35:04,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2889 transitions. [2022-01-18 06:35:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:35:04,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:04,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:04,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 06:35:04,463 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 39 times [2022-01-18 06:35:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530499385] [2022-01-18 06:35:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:04,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530499385] [2022-01-18 06:35:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530499385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162804451] [2022-01-18 06:35:04,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:35:04,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:04,649 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:35:04,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:35:04,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:35:04,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:05,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:05,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162804451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:05,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:05,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-01-18 06:35:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250774820] [2022-01-18 06:35:05,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:05,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:35:05,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:35:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:35:05,827 INFO L87 Difference]: Start difference. First operand 1251 states and 2889 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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) [2022-01-18 06:35:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:10,513 INFO L93 Difference]: Finished difference Result 2034 states and 4490 transitions. [2022-01-18 06:35:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 06:35:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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 27 [2022-01-18 06:35:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:10,517 INFO L225 Difference]: With dead ends: 2034 [2022-01-18 06:35:10,517 INFO L226 Difference]: Without dead ends: 1966 [2022-01-18 06:35:10,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2605, Invalid=12401, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 06:35:10,519 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:10,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 300 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:35:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-01-18 06:35:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1192. [2022-01-18 06:35:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.311502938706969) internal successors, (2753), 1191 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2753 transitions. [2022-01-18 06:35:10,542 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2753 transitions. Word has length 27 [2022-01-18 06:35:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:10,542 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2753 transitions. [2022-01-18 06:35:10,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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) [2022-01-18 06:35:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2753 transitions. [2022-01-18 06:35:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:10,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:10,544 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:10,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 06:35:10,765 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash 56938553, now seen corresponding path program 40 times [2022-01-18 06:35:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513203595] [2022-01-18 06:35:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:10,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 06:35:10,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513203595] [2022-01-18 06:35:10,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513203595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146224832] [2022-01-18 06:35:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:35:10,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:10,935 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:10,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:35:10,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:35:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:10,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:35:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:11,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:12,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146224832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:12,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:12,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-01-18 06:35:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247140810] [2022-01-18 06:35:12,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:12,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:35:12,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:35:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:35:12,448 INFO L87 Difference]: Start difference. First operand 1192 states and 2753 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:15,636 INFO L93 Difference]: Finished difference Result 2673 states and 6185 transitions. [2022-01-18 06:35:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 06:35:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:15,639 INFO L225 Difference]: With dead ends: 2673 [2022-01-18 06:35:15,639 INFO L226 Difference]: Without dead ends: 2542 [2022-01-18 06:35:15,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1411, Invalid=7145, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:35:15,642 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 295 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:15,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 230 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:35:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-01-18 06:35:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 595. [2022-01-18 06:35:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0336700336700337) internal successors, (1208), 594 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1208 transitions. [2022-01-18 06:35:15,664 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1208 transitions. Word has length 29 [2022-01-18 06:35:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:15,664 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1208 transitions. [2022-01-18 06:35:15,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1208 transitions. [2022-01-18 06:35:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:15,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:15,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:15,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:15,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 06:35:15,887 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1849159349, now seen corresponding path program 41 times [2022-01-18 06:35:15,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:15,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826859437] [2022-01-18 06:35:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:15,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:35:16,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826859437] [2022-01-18 06:35:16,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826859437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7243436] [2022-01-18 06:35:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:35:16,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:16,062 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:16,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:35:16,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:35:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:16,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:35:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:16,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7243436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:17,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:17,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-01-18 06:35:17,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493798093] [2022-01-18 06:35:17,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:17,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 06:35:17,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 06:35:17,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:35:17,568 INFO L87 Difference]: Start difference. First operand 595 states and 1208 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:20,307 INFO L93 Difference]: Finished difference Result 908 states and 1838 transitions. [2022-01-18 06:35:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:35:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:20,309 INFO L225 Difference]: With dead ends: 908 [2022-01-18 06:35:20,309 INFO L226 Difference]: Without dead ends: 883 [2022-01-18 06:35:20,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1393, Invalid=7537, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 06:35:20,310 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:20,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:35:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-18 06:35:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 589. [2022-01-18 06:35:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0051020408163267) internal successors, (1179), 588 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1179 transitions. [2022-01-18 06:35:20,318 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1179 transitions. Word has length 29 [2022-01-18 06:35:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:20,319 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1179 transitions. [2022-01-18 06:35:20,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1179 transitions. [2022-01-18 06:35:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:20,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:20,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:20,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 06:35:20,521 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1727060569, now seen corresponding path program 42 times [2022-01-18 06:35:20,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399300395] [2022-01-18 06:35:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:20,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:20,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399300395] [2022-01-18 06:35:20,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399300395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360544626] [2022-01-18 06:35:20,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:35:20,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:20,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:20,776 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:35:20,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:35:20,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:35:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:21,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360544626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:22,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:22,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 06:35:22,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005085583] [2022-01-18 06:35:22,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:22,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:35:22,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:35:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:35:22,973 INFO L87 Difference]: Start difference. First operand 589 states and 1179 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:29,094 INFO L93 Difference]: Finished difference Result 1179 states and 2345 transitions. [2022-01-18 06:35:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 06:35:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:29,096 INFO L225 Difference]: With dead ends: 1179 [2022-01-18 06:35:29,096 INFO L226 Difference]: Without dead ends: 1136 [2022-01-18 06:35:29,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1522, Invalid=8578, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 06:35:29,097 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 288 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:29,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 98 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:35:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-18 06:35:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 759. [2022-01-18 06:35:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0026385224274406) internal successors, (1518), 758 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1518 transitions. [2022-01-18 06:35:29,107 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1518 transitions. Word has length 29 [2022-01-18 06:35:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:29,108 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1518 transitions. [2022-01-18 06:35:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1518 transitions. [2022-01-18 06:35:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:29,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:29,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:29,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:29,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:29,323 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1863336609, now seen corresponding path program 43 times [2022-01-18 06:35:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434490471] [2022-01-18 06:35:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:29,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:29,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434490471] [2022-01-18 06:35:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434490471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174777439] [2022-01-18 06:35:29,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:35:29,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:29,595 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:35:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:29,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:35:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:31,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174777439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:31,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:31,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 06:35:31,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823308118] [2022-01-18 06:35:31,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:31,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:35:31,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:35:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:35:31,700 INFO L87 Difference]: Start difference. First operand 759 states and 1518 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:38,544 INFO L93 Difference]: Finished difference Result 1815 states and 3619 transitions. [2022-01-18 06:35:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 06:35:38,545 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:38,547 INFO L225 Difference]: With dead ends: 1815 [2022-01-18 06:35:38,547 INFO L226 Difference]: Without dead ends: 1769 [2022-01-18 06:35:38,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1903, Invalid=10307, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 06:35:38,548 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:38,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 107 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:35:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-01-18 06:35:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1016. [2022-01-18 06:35:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.0009852216748767) internal successors, (2031), 1015 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2031 transitions. [2022-01-18 06:35:38,563 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2031 transitions. Word has length 29 [2022-01-18 06:35:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:38,564 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2031 transitions. [2022-01-18 06:35:38,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2031 transitions. [2022-01-18 06:35:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:38,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:38,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:38,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 06:35:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:38,787 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1925315549, now seen corresponding path program 44 times [2022-01-18 06:35:38,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:38,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632413410] [2022-01-18 06:35:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:38,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:38,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632413410] [2022-01-18 06:35:38,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632413410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575910583] [2022-01-18 06:35:38,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:35:38,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:38,984 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:38,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:35:39,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:35:39,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:35:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575910583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:40,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:40,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 06:35:40,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747463579] [2022-01-18 06:35:40,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:40,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:35:40,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:35:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:35:40,894 INFO L87 Difference]: Start difference. First operand 1016 states and 2031 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:46,706 INFO L93 Difference]: Finished difference Result 2259 states and 4514 transitions. [2022-01-18 06:35:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 06:35:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:46,709 INFO L225 Difference]: With dead ends: 2259 [2022-01-18 06:35:46,709 INFO L226 Difference]: Without dead ends: 2223 [2022-01-18 06:35:46,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2498, Invalid=13252, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 06:35:46,710 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:46,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 135 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:35:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-01-18 06:35:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1208. [2022-01-18 06:35:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.003314001657001) internal successors, (2418), 1207 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2418 transitions. [2022-01-18 06:35:46,724 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2418 transitions. Word has length 29 [2022-01-18 06:35:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:46,724 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 2418 transitions. [2022-01-18 06:35:46,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2418 transitions. [2022-01-18 06:35:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:46,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:46,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:46,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 06:35:46,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 06:35:46,926 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash 849604393, now seen corresponding path program 45 times [2022-01-18 06:35:46,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:46,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059305026] [2022-01-18 06:35:46,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:46,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:47,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059305026] [2022-01-18 06:35:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059305026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921573963] [2022-01-18 06:35:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:35:47,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:47,152 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:47,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:35:47,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:35:47,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:35:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:47,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:49,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921573963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:49,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:49,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 06:35:49,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692085724] [2022-01-18 06:35:49,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:49,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:35:49,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:49,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:35:49,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:35:49,039 INFO L87 Difference]: Start difference. First operand 1208 states and 2418 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:35:53,828 INFO L93 Difference]: Finished difference Result 2363 states and 4723 transitions. [2022-01-18 06:35:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 06:35:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:35:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:35:53,831 INFO L225 Difference]: With dead ends: 2363 [2022-01-18 06:35:53,831 INFO L226 Difference]: Without dead ends: 2333 [2022-01-18 06:35:53,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2095, Invalid=11015, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 06:35:53,832 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:35:53,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:35:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-01-18 06:35:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1213. [2022-01-18 06:35:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.004125412541254) internal successors, (2429), 1212 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2429 transitions. [2022-01-18 06:35:53,851 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2429 transitions. Word has length 29 [2022-01-18 06:35:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:35:53,851 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2429 transitions. [2022-01-18 06:35:53,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:35:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2429 transitions. [2022-01-18 06:35:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:35:53,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:35:53,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:35:53,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 06:35:54,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:35:54,074 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:35:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:35:54,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2097362907, now seen corresponding path program 46 times [2022-01-18 06:35:54,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:35:54,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013598677] [2022-01-18 06:35:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:35:54,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:35:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:35:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:35:54,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:35:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013598677] [2022-01-18 06:35:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013598677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:35:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423567228] [2022-01-18 06:35:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:35:54,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:35:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:35:54,299 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:35:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:35:54,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:35:54,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:35:54,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:35:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:35:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:55,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:35:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:35:56,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423567228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:35:56,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:35:56,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 06:35:56,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915396249] [2022-01-18 06:35:56,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:35:56,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:35:56,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:35:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:35:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:35:56,178 INFO L87 Difference]: Start difference. First operand 1213 states and 2429 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:01,265 INFO L93 Difference]: Finished difference Result 2885 states and 5768 transitions. [2022-01-18 06:36:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:36:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:36:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:01,272 INFO L225 Difference]: With dead ends: 2885 [2022-01-18 06:36:01,272 INFO L226 Difference]: Without dead ends: 2834 [2022-01-18 06:36:01,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1895, Invalid=10315, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 06:36:01,273 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:01,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 186 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:36:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-01-18 06:36:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1824. [2022-01-18 06:36:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.0098738343390017) internal successors, (3664), 1823 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3664 transitions. [2022-01-18 06:36:01,300 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3664 transitions. Word has length 29 [2022-01-18 06:36:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:01,300 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3664 transitions. [2022-01-18 06:36:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3664 transitions. [2022-01-18 06:36:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:36:01,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:01,303 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:01,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 06:36:01,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 06:36:01,503 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:36:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 47 times [2022-01-18 06:36:01,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:01,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214122774] [2022-01-18 06:36:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:01,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:01,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214122774] [2022-01-18 06:36:01,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214122774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992535079] [2022-01-18 06:36:01,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:01,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:01,732 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:36:01,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:36:01,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:36:01,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:02,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:03,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992535079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:03,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:03,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-01-18 06:36:03,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104121160] [2022-01-18 06:36:03,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:03,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 06:36:03,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 06:36:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:36:03,778 INFO L87 Difference]: Start difference. First operand 1824 states and 3664 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:07,325 INFO L93 Difference]: Finished difference Result 3116 states and 6260 transitions. [2022-01-18 06:36:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:36:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:36:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:07,328 INFO L225 Difference]: With dead ends: 3116 [2022-01-18 06:36:07,328 INFO L226 Difference]: Without dead ends: 3065 [2022-01-18 06:36:07,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1379, Invalid=7933, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 06:36:07,329 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:07,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 192 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:36:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-18 06:36:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1021. [2022-01-18 06:36:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.996078431372549) internal successors, (2036), 1020 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2036 transitions. [2022-01-18 06:36:07,345 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2036 transitions. Word has length 29 [2022-01-18 06:36:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:07,345 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2036 transitions. [2022-01-18 06:36:07,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2036 transitions. [2022-01-18 06:36:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:36:07,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:07,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:07,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:36:07,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:07,547 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:36:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1219843941, now seen corresponding path program 48 times [2022-01-18 06:36:07,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:07,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137691162] [2022-01-18 06:36:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:07,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:07,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:07,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137691162] [2022-01-18 06:36:07,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137691162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:07,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657151324] [2022-01-18 06:36:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:07,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:07,755 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:36:07,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:36:07,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:36:07,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:08,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:09,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657151324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:09,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:09,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 06:36:09,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199751095] [2022-01-18 06:36:09,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:09,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 06:36:09,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 06:36:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:36:09,723 INFO L87 Difference]: Start difference. First operand 1021 states and 2036 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:12,248 INFO L93 Difference]: Finished difference Result 1676 states and 3347 transitions. [2022-01-18 06:36:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:36:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:36:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:12,248 INFO L225 Difference]: With dead ends: 1676 [2022-01-18 06:36:12,248 INFO L226 Difference]: Without dead ends: 0 [2022-01-18 06:36:12,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1156, Invalid=6500, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 06:36:12,249 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:12,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 118 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:36:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-18 06:36:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-18 06:36:12,249 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) [2022-01-18 06:36:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-18 06:36:12,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-01-18 06:36:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-18 06:36:12,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-18 06:36:12,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-18 06:36:12,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 06:36:12,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 06:36:12,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 06:36:12,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:12,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:36:12,456 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1] [2022-01-18 06:36:12,457 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:36:12,457 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:36:12,459 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:36:12 BasicIcfg [2022-01-18 06:36:12,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:36:12,460 INFO L158 Benchmark]: Toolchain (without parser) took 260931.52ms. Allocated memory was 383.8MB in the beginning and 497.0MB in the end (delta: 113.2MB). Free memory was 344.5MB in the beginning and 371.0MB in the end (delta: -26.5MB). Peak memory consumption was 87.2MB. Max. memory is 16.0GB. [2022-01-18 06:36:12,460 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 383.8MB. Free memory is still 345.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:36:12,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.37ms. Allocated memory is still 383.8MB. Free memory was 344.5MB in the beginning and 343.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:36:12,460 INFO L158 Benchmark]: Boogie Preprocessor took 11.25ms. Allocated memory is still 383.8MB. Free memory was 342.9MB in the beginning and 342.1MB in the end (delta: 829.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:36:12,460 INFO L158 Benchmark]: RCFGBuilder took 176.81ms. Allocated memory is still 383.8MB. Free memory was 341.9MB in the beginning and 332.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 06:36:12,460 INFO L158 Benchmark]: TraceAbstraction took 260717.38ms. Allocated memory was 383.8MB in the beginning and 497.0MB in the end (delta: 113.2MB). Free memory was 332.4MB in the beginning and 371.0MB in the end (delta: -38.6MB). Peak memory consumption was 76.7MB. Max. memory is 16.0GB. [2022-01-18 06:36:12,472 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 0.12ms. Allocated memory is still 383.8MB. Free memory is still 345.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.37ms. Allocated memory is still 383.8MB. Free memory was 344.5MB in the beginning and 343.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 11.25ms. Allocated memory is still 383.8MB. Free memory was 342.9MB in the beginning and 342.1MB in the end (delta: 829.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 176.81ms. Allocated memory is still 383.8MB. Free memory was 341.9MB in the beginning and 332.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 260717.38ms. Allocated memory was 383.8MB in the beginning and 497.0MB in the end (delta: 113.2MB). Free memory was 332.4MB in the beginning and 371.0MB in the end (delta: -38.6MB). Peak memory consumption was 76.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 260.6s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 179.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19404 SdHoareTripleChecker+Valid, 30.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19404 mSDsluCounter, 11858 SdHoareTripleChecker+Invalid, 26.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18380 mSDsCounter, 9590 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66015 IncrementalHoareTripleChecker+Invalid, 75605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9590 mSolverCounterUnsat, 757 mSDtfsCounter, 66015 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6289 GetRequests, 1218 SyntacticMatches, 118 SemanticMatches, 4953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204131 ImplicationChecksByTransitivity, 175.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1824occurred in iteration=48, InterpolantAutomatonStates: 3968, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 50 MinimizatonAttempts, 24455 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 69.1s InterpolantComputationTime, 2533 NumberOfCodeBlocks, 2533 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 3629 ConstructedInterpolants, 0 QuantifiedInterpolants, 82588 SizeOfPredicates, 423 NumberOfNonLiveVariables, 2064 ConjunctsInSsa, 934 ConjunctsInUnsatCore, 144 InterpolantComputations, 3 PerfectInterpolantSequences, 47/1929 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! [2022-01-18 06:36:12,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...