/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:19:55,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:19:55,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:19:55,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-28 15:19:55,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-28 15:19:55,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-28 15:19:55,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-28 15:19:55,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-28 15:19:55,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-28 15:19:55,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-28 15:19:55,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-28 15:19:55,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-28 15:19:55,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-28 15:19:55,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-28 15:19:55,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-28 15:19:55,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-28 15:19:55,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-28 15:19:55,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-28 15:19:55,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-28 15:19:55,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-28 15:19:55,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-28 15:19:55,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-28 15:19:55,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-28 15:19:55,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-28 15:19:55,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-28 15:19:55,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-28 15:19:55,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-28 15:19:55,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-28 15:19:55,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-28 15:19:55,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-28 15:19:55,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-28 15:19:55,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-28 15:19:55,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-28 15:19:55,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-28 15:19:55,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-28 15:19:55,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-28 15:19:55,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-28 15:19:55,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-28 15:19:55,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-28 15:19:55,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-28 15:19:55,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-28 15:19:55,905 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 [2022-01-28 15:19:55,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:19:55,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:19:55,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:19:55,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:19:55,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:19:55,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:19:55,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:19:55,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:19:55,931 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:19:55,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:19:55,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:19:55,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:19:55,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:19:55,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:19:55,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:55,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:19:55,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:19:55,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:19:55,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:19:55,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:19:55,935 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:19:55,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:19:55,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:19:56,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:19:56,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:19:56,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:19:56,164 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:19:56,167 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:19:56,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2022-01-28 15:19:56,168 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2022-01-28 15:19:56,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:19:56,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:19:56,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:56,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:19:56,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:19:56,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,216 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:19:56,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:19:56,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:19:56,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:19:56,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:19:56,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:19:56,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:19:56,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:19:56,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:19:56,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/1) ... [2022-01-28 15:19:56,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:19:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:56,276 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) [2022-01-28 15:19:56,319 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 [2022-01-28 15:19:56,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:19:56,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:19:56,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:19:56,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:19:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:19:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:19:56,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:19:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:19:56,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:19:56,345 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:19:56,377 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:19:56,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:19:56,454 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:19:56,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:19:56,472 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:19:56,475 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:56 BoogieIcfgContainer [2022-01-28 15:19:56,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:19:56,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:19:56,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:19:56,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:19:56,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:19:56" (1/2) ... [2022-01-28 15:19:56,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481bc10a and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:19:56, skipping insertion in model container [2022-01-28 15:19:56,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:19:56" (2/2) ... [2022-01-28 15:19:56,482 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2022-01-28 15:19:56,486 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:19:56,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:19:56,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:19:56,486 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:19:56,517 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-28 15:19:56,555 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:19:56,561 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 [2022-01-28 15:19:56,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-28 15:19:56,568 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-28 15:19:56,610 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2022-01-28 15:19:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2022-01-28 15:19:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-28 15:19:56,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:19:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2022-01-28 15:19:56,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759090694] [2022-01-28 15:19:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:56,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759090694] [2022-01-28 15:19:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759090694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:56,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:56,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:19:56,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461979906] [2022-01-28 15:19:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:56,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:56,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:19:56,778 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) 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) [2022-01-28 15:19:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,830 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-01-28 15:19:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:56,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 [2022-01-28 15:19:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,837 INFO L225 Difference]: With dead ends: 43 [2022-01-28 15:19:56,838 INFO L226 Difference]: Without dead ends: 43 [2022-01-28 15:19:56,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:56,841 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-28 15:19:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-28 15:19:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-01-28 15:19:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-01-28 15:19:56,872 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-01-28 15:19:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-01-28 15:19:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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) [2022-01-28 15:19:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-01-28 15:19:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 15:19:56,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:19:56,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:19:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash 703590631, now seen corresponding path program 1 times [2022-01-28 15:19:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044723246] [2022-01-28 15:19:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:19:56,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:56,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044723246] [2022-01-28 15:19:56,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044723246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:19:56,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:19:56,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:19:56,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753963051] [2022-01-28 15:19:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:19:56,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:19:56,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:19:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:19:56,916 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:56,950 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-01-28 15:19:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:19:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-01-28 15:19:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:56,952 INFO L225 Difference]: With dead ends: 50 [2022-01-28 15:19:56,952 INFO L226 Difference]: Without dead ends: 50 [2022-01-28 15:19:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:19:56,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:56,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:19:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-28 15:19:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-01-28 15:19:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-01-28 15:19:56,968 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-01-28 15:19:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:56,969 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-01-28 15:19:56,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-01-28 15:19:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:56,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:56,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:56,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 15:19:56,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:19:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2022-01-28 15:19:56,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:56,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894176398] [2022-01-28 15:19:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:56,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894176398] [2022-01-28 15:19:57,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894176398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779526721] [2022-01-28 15:19:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:57,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:57,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:57,284 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) [2022-01-28 15:19:57,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:19:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:19:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:57,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:58,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779526721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:58,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:58,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-28 15:19:58,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119873204] [2022-01-28 15:19:58,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:58,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:19:58,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:19:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:19:58,363 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:19:58,732 INFO L93 Difference]: Finished difference Result 131 states and 244 transitions. [2022-01-28 15:19:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:19:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:19:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:19:58,734 INFO L225 Difference]: With dead ends: 131 [2022-01-28 15:19:58,734 INFO L226 Difference]: Without dead ends: 100 [2022-01-28 15:19:58,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:19:58,735 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:19:58,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:19:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-28 15:19:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2022-01-28 15:19:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 120 transitions. [2022-01-28 15:19:58,741 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 120 transitions. Word has length 19 [2022-01-28 15:19:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:19:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 120 transitions. [2022-01-28 15:19:58,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:19:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 120 transitions. [2022-01-28 15:19:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:19:58,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:19:58,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:19:58,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-28 15:19:58,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:58,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:19:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:19:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1966880365, now seen corresponding path program 2 times [2022-01-28 15:19:58,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:19:58,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350131436] [2022-01-28 15:19:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:19:58,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:19:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:19:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:19:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350131436] [2022-01-28 15:19:59,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350131436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:19:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008730640] [2022-01-28 15:19:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:19:59,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:19:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:19:59,110 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) [2022-01-28 15:19:59,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:19:59,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:19:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:19:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:19:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:19:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:19:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:19:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008730640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:19:59,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:19:59,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-28 15:19:59,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648051287] [2022-01-28 15:19:59,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:19:59,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:19:59,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:19:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:19:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:19:59,814 INFO L87 Difference]: Start difference. First operand 62 states and 120 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:00,216 INFO L93 Difference]: Finished difference Result 142 states and 262 transitions. [2022-01-28 15:20:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:20:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:20:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:00,220 INFO L225 Difference]: With dead ends: 142 [2022-01-28 15:20:00,220 INFO L226 Difference]: Without dead ends: 120 [2022-01-28 15:20:00,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:20:00,222 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:00,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 161 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-28 15:20:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 57. [2022-01-28 15:20:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2022-01-28 15:20:00,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2022-01-28 15:20:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:00,240 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2022-01-28 15:20:00,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2022-01-28 15:20:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:20:00,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:00,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:00,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-28 15:20:00,474 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1678017961, now seen corresponding path program 3 times [2022-01-28 15:20:00,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921229280] [2022-01-28 15:20:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:00,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921229280] [2022-01-28 15:20:00,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921229280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:00,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435317063] [2022-01-28 15:20:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:00,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:00,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:00,595 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) [2022-01-28 15:20:00,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:20:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:00,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:20:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:00,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435317063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:01,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:01,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-28 15:20:01,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981154049] [2022-01-28 15:20:01,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:01,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:20:01,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:20:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:20:01,306 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:01,559 INFO L93 Difference]: Finished difference Result 93 states and 174 transitions. [2022-01-28 15:20:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:20:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:20:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:01,560 INFO L225 Difference]: With dead ends: 93 [2022-01-28 15:20:01,560 INFO L226 Difference]: Without dead ends: 86 [2022-01-28 15:20:01,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:01,560 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:01,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 83 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:20:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-28 15:20:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2022-01-28 15:20:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-01-28 15:20:01,564 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-01-28 15:20:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:01,564 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-01-28 15:20:01,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-01-28 15:20:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:01,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:01,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:01,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:01,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:01,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 4 times [2022-01-28 15:20:01,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637802982] [2022-01-28 15:20:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:01,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:01,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:01,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637802982] [2022-01-28 15:20:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637802982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:01,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415432330] [2022-01-28 15:20:01,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:01,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:01,968 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) [2022-01-28 15:20:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:20:01,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415432330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:02,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:20:02,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734692554] [2022-01-28 15:20:02,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:20:02,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:20:02,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:02,851 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:03,424 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2022-01-28 15:20:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:20:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:03,425 INFO L225 Difference]: With dead ends: 120 [2022-01-28 15:20:03,425 INFO L226 Difference]: Without dead ends: 106 [2022-01-28 15:20:03,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:20:03,426 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:03,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 110 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-28 15:20:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2022-01-28 15:20:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 58 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 108 transitions. [2022-01-28 15:20:03,429 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 108 transitions. Word has length 21 [2022-01-28 15:20:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:03,429 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 108 transitions. [2022-01-28 15:20:03,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 108 transitions. [2022-01-28 15:20:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:03,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:03,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-28 15:20:03,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1908898987, now seen corresponding path program 5 times [2022-01-28 15:20:03,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525084648] [2022-01-28 15:20:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:03,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:03,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:03,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525084648] [2022-01-28 15:20:03,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525084648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:03,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171204646] [2022-01-28 15:20:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:03,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:03,791 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) [2022-01-28 15:20:03,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:20:03,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:20:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:04,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:04,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171204646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:04,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:04,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:20:04,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289789789] [2022-01-28 15:20:04,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:04,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:20:04,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:20:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:20:04,606 INFO L87 Difference]: Start difference. First operand 59 states and 108 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:05,249 INFO L93 Difference]: Finished difference Result 157 states and 284 transitions. [2022-01-28 15:20:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:20:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:05,250 INFO L225 Difference]: With dead ends: 157 [2022-01-28 15:20:05,250 INFO L226 Difference]: Without dead ends: 143 [2022-01-28 15:20:05,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1412, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:20:05,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 145 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-28 15:20:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 60. [2022-01-28 15:20:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2022-01-28 15:20:05,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 21 [2022-01-28 15:20:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:05,255 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2022-01-28 15:20:05,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2022-01-28 15:20:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:05,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:05,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:05,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-28 15:20:05,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:05,463 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1735999339, now seen corresponding path program 6 times [2022-01-28 15:20:05,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921486022] [2022-01-28 15:20:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:05,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:05,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921486022] [2022-01-28 15:20:05,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921486022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090419782] [2022-01-28 15:20:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:05,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:05,660 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) [2022-01-28 15:20:05,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:20:05,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:20:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:06,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:06,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090419782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:06,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:06,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:20:06,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289112279] [2022-01-28 15:20:06,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:20:06,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:20:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:20:06,554 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:07,121 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2022-01-28 15:20:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:20:07,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:07,122 INFO L225 Difference]: With dead ends: 127 [2022-01-28 15:20:07,122 INFO L226 Difference]: Without dead ends: 113 [2022-01-28 15:20:07,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 15:20:07,123 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:07,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 123 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-28 15:20:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 60. [2022-01-28 15:20:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2022-01-28 15:20:07,126 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 21 [2022-01-28 15:20:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2022-01-28 15:20:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2022-01-28 15:20:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:07,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:07,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:07,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:07,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:07,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1011257333, now seen corresponding path program 7 times [2022-01-28 15:20:07,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912203406] [2022-01-28 15:20:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:07,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:07,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912203406] [2022-01-28 15:20:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912203406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411764259] [2022-01-28 15:20:07,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:07,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:07,470 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) [2022-01-28 15:20:07,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:20:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:08,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411764259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:08,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:08,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:08,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828730048] [2022-01-28 15:20:08,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:08,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:08,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:08,334 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-01-28 15:20:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:09,418 INFO L93 Difference]: Finished difference Result 204 states and 369 transitions. [2022-01-28 15:20:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:20:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 21 [2022-01-28 15:20:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:09,424 INFO L225 Difference]: With dead ends: 204 [2022-01-28 15:20:09,424 INFO L226 Difference]: Without dead ends: 176 [2022-01-28 15:20:09,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=2075, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 15:20:09,426 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:09,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 235 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-28 15:20:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2022-01-28 15:20:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2022-01-28 15:20:09,452 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 21 [2022-01-28 15:20:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:09,454 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2022-01-28 15:20:09,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-01-28 15:20:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2022-01-28 15:20:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:09,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:09,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:09,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:09,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:09,661 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1661326303, now seen corresponding path program 8 times [2022-01-28 15:20:09,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:09,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357760726] [2022-01-28 15:20:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:09,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:09,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357760726] [2022-01-28 15:20:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357760726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157353730] [2022-01-28 15:20:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:09,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:09,800 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) [2022-01-28 15:20:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:20:09,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:10,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:10,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157353730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:10,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:10,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:10,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573740638] [2022-01-28 15:20:10,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:10,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:10,519 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:11,541 INFO L93 Difference]: Finished difference Result 201 states and 368 transitions. [2022-01-28 15:20:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:20:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:11,543 INFO L225 Difference]: With dead ends: 201 [2022-01-28 15:20:11,543 INFO L226 Difference]: Without dead ends: 187 [2022-01-28 15:20:11,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=478, Invalid=2278, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:20:11,544 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:11,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 172 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-28 15:20:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 74. [2022-01-28 15:20:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2022-01-28 15:20:11,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 21 [2022-01-28 15:20:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:11,547 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2022-01-28 15:20:11,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2022-01-28 15:20:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:11,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:11,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:11,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:11,759 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,SelfDestructingSolverStorable9 [2022-01-28 15:20:11,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash -399533499, now seen corresponding path program 9 times [2022-01-28 15:20:11,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:11,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552549946] [2022-01-28 15:20:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:11,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:11,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552549946] [2022-01-28 15:20:11,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552549946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820276148] [2022-01-28 15:20:11,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:11,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:11,884 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) [2022-01-28 15:20:11,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:20:11,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:20:11,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:12,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:12,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820276148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:12,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:12,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:12,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345738235] [2022-01-28 15:20:12,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:12,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:12,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:12,674 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:13,160 INFO L93 Difference]: Finished difference Result 121 states and 227 transitions. [2022-01-28 15:20:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:20:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:13,161 INFO L225 Difference]: With dead ends: 121 [2022-01-28 15:20:13,161 INFO L226 Difference]: Without dead ends: 107 [2022-01-28 15:20:13,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:20:13,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:13,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 135 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-28 15:20:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2022-01-28 15:20:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2022-01-28 15:20:13,173 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 21 [2022-01-28 15:20:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:13,174 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2022-01-28 15:20:13,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2022-01-28 15:20:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:13,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:13,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:13,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:13,395 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1239609169, now seen corresponding path program 10 times [2022-01-28 15:20:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952136369] [2022-01-28 15:20:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:13,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952136369] [2022-01-28 15:20:13,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952136369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718878340] [2022-01-28 15:20:13,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:13,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:13,552 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) [2022-01-28 15:20:13,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:20:13,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:13,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:13,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:14,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718878340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:14,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396918978] [2022-01-28 15:20:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:14,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:14,355 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-01-28 15:20:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:15,182 INFO L93 Difference]: Finished difference Result 177 states and 326 transitions. [2022-01-28 15:20:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 15:20:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 21 [2022-01-28 15:20:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:15,183 INFO L225 Difference]: With dead ends: 177 [2022-01-28 15:20:15,183 INFO L226 Difference]: Without dead ends: 163 [2022-01-28 15:20:15,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=2434, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 15:20:15,185 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:15,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 163 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-28 15:20:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 75. [2022-01-28 15:20:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2022-01-28 15:20:15,190 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 21 [2022-01-28 15:20:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:15,190 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2022-01-28 15:20:15,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-01-28 15:20:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2022-01-28 15:20:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:15,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:15,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:15,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-28 15:20:15,403 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,SelfDestructingSolverStorable11 [2022-01-28 15:20:15,403 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash -589540199, now seen corresponding path program 11 times [2022-01-28 15:20:15,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:15,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556321470] [2022-01-28 15:20:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:15,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:15,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556321470] [2022-01-28 15:20:15,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556321470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697923470] [2022-01-28 15:20:15,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:15,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:15,531 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) [2022-01-28 15:20:15,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:20:15,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:20:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:15,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:16,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697923470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:16,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:16,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:16,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007848758] [2022-01-28 15:20:16,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:16,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:16,284 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:17,098 INFO L93 Difference]: Finished difference Result 169 states and 307 transitions. [2022-01-28 15:20:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:20:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:17,100 INFO L225 Difference]: With dead ends: 169 [2022-01-28 15:20:17,100 INFO L226 Difference]: Without dead ends: 155 [2022-01-28 15:20:17,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=526, Invalid=2336, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:20:17,101 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 242 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:17,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 160 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-28 15:20:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 74. [2022-01-28 15:20:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2022-01-28 15:20:17,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 21 [2022-01-28 15:20:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2022-01-28 15:20:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2022-01-28 15:20:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:17,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:17,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:17,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:17,304 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,SelfDestructingSolverStorable12 [2022-01-28 15:20:17,305 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1644567295, now seen corresponding path program 12 times [2022-01-28 15:20:17,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:17,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731381658] [2022-01-28 15:20:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:17,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:17,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:17,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731381658] [2022-01-28 15:20:17,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731381658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:17,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044648876] [2022-01-28 15:20:17,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:17,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:17,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:17,426 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) [2022-01-28 15:20:17,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:20:17,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:20:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:17,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:17,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044648876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:18,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:20:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380994740] [2022-01-28 15:20:18,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:18,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:18,255 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:18,806 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2022-01-28 15:20:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 15:20:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:18,807 INFO L225 Difference]: With dead ends: 140 [2022-01-28 15:20:18,808 INFO L226 Difference]: Without dead ends: 126 [2022-01-28 15:20:18,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 15:20:18,808 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:18,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 161 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-28 15:20:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2022-01-28 15:20:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2022-01-28 15:20:18,811 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2022-01-28 15:20:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2022-01-28 15:20:18,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2022-01-28 15:20:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:20:18,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:18,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:18,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:19,031 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,SelfDestructingSolverStorable13 [2022-01-28 15:20:19,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 13 times [2022-01-28 15:20:19,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113512068] [2022-01-28 15:20:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:19,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113512068] [2022-01-28 15:20:19,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113512068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519908983] [2022-01-28 15:20:19,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:19,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:19,127 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) [2022-01-28 15:20:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:20:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:20:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:19,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519908983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:19,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:19,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:20:19,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576104884] [2022-01-28 15:20:19,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:19,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:20:19,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:20:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:19,773 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:20,252 INFO L93 Difference]: Finished difference Result 109 states and 197 transitions. [2022-01-28 15:20:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:20:20,253 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 15:20:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:20,253 INFO L225 Difference]: With dead ends: 109 [2022-01-28 15:20:20,253 INFO L226 Difference]: Without dead ends: 77 [2022-01-28 15:20:20,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:20:20,254 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:20,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 131 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-28 15:20:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-01-28 15:20:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2022-01-28 15:20:20,256 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 21 [2022-01-28 15:20:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:20,256 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2022-01-28 15:20:20,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2022-01-28 15:20:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:20,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:20,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:20,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:20,467 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,SelfDestructingSolverStorable14 [2022-01-28 15:20:20,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 14 times [2022-01-28 15:20:20,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670225408] [2022-01-28 15:20:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:20,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:20,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670225408] [2022-01-28 15:20:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670225408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222758448] [2022-01-28 15:20:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:20,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:20,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:20,636 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) [2022-01-28 15:20:20,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:20:20,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:20,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:20,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:21,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222758448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:21,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:21,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-28 15:20:21,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342686186] [2022-01-28 15:20:21,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:21,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:20:21,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:20:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:20:21,079 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:22,320 INFO L93 Difference]: Finished difference Result 292 states and 531 transitions. [2022-01-28 15:20:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:20:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:22,321 INFO L225 Difference]: With dead ends: 292 [2022-01-28 15:20:22,321 INFO L226 Difference]: Without dead ends: 204 [2022-01-28 15:20:22,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1137, Invalid=5343, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:20:22,325 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 400 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:22,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 380 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-28 15:20:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 88. [2022-01-28 15:20:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 87 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 182 transitions. [2022-01-28 15:20:22,338 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 182 transitions. Word has length 23 [2022-01-28 15:20:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 182 transitions. [2022-01-28 15:20:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 182 transitions. [2022-01-28 15:20:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:22,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:22,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:22,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:22,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -422333271, now seen corresponding path program 15 times [2022-01-28 15:20:22,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848401317] [2022-01-28 15:20:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:22,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:22,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848401317] [2022-01-28 15:20:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848401317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714776055] [2022-01-28 15:20:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:22,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:22,760 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) [2022-01-28 15:20:22,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:20:22,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:22,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:23,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714776055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:23,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:23,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-28 15:20:23,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729081844] [2022-01-28 15:20:23,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:23,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:20:23,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:20:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:20:23,276 INFO L87 Difference]: Start difference. First operand 88 states and 182 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:24,426 INFO L93 Difference]: Finished difference Result 274 states and 485 transitions. [2022-01-28 15:20:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:20:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:24,427 INFO L225 Difference]: With dead ends: 274 [2022-01-28 15:20:24,427 INFO L226 Difference]: Without dead ends: 239 [2022-01-28 15:20:24,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1029, Invalid=4823, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 15:20:24,429 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 306 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:24,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 334 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-28 15:20:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 90. [2022-01-28 15:20:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 187 transitions. [2022-01-28 15:20:24,432 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 187 transitions. Word has length 23 [2022-01-28 15:20:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:24,432 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 187 transitions. [2022-01-28 15:20:24,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 187 transitions. [2022-01-28 15:20:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:24,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:24,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:24,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:24,633 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,SelfDestructingSolverStorable16 [2022-01-28 15:20:24,633 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1687261131, now seen corresponding path program 16 times [2022-01-28 15:20:24,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:24,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137636004] [2022-01-28 15:20:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:24,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:24,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137636004] [2022-01-28 15:20:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137636004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465512750] [2022-01-28 15:20:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:24,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:24,784 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) [2022-01-28 15:20:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:20:24,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:24,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:25,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465512750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:25,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:25,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-01-28 15:20:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033417926] [2022-01-28 15:20:25,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:20:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:20:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:20:25,345 INFO L87 Difference]: Start difference. First operand 90 states and 187 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:26,567 INFO L93 Difference]: Finished difference Result 258 states and 448 transitions. [2022-01-28 15:20:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:20:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:26,568 INFO L225 Difference]: With dead ends: 258 [2022-01-28 15:20:26,568 INFO L226 Difference]: Without dead ends: 206 [2022-01-28 15:20:26,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=974, Invalid=4282, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 15:20:26,570 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 368 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:26,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 295 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-28 15:20:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 99. [2022-01-28 15:20:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 98 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 207 transitions. [2022-01-28 15:20:26,572 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 207 transitions. Word has length 23 [2022-01-28 15:20:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:26,572 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 207 transitions. [2022-01-28 15:20:26,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 207 transitions. [2022-01-28 15:20:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:26,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:26,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:26,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-28 15:20:26,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-28 15:20:26,773 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 98993111, now seen corresponding path program 17 times [2022-01-28 15:20:26,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:26,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224044589] [2022-01-28 15:20:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:26,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:26,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:26,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224044589] [2022-01-28 15:20:26,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224044589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:26,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942948537] [2022-01-28 15:20:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:26,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:26,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:26,927 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) [2022-01-28 15:20:26,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:20:26,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:20:26,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:26,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942948537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:27,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:27,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-28 15:20:27,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127567847] [2022-01-28 15:20:27,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:27,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:27,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:27,507 INFO L87 Difference]: Start difference. First operand 99 states and 207 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2022-01-28 15:20:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:28,804 INFO L93 Difference]: Finished difference Result 221 states and 397 transitions. [2022-01-28 15:20:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 15:20:28,804 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 23 [2022-01-28 15:20:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:28,805 INFO L225 Difference]: With dead ends: 221 [2022-01-28 15:20:28,805 INFO L226 Difference]: Without dead ends: 200 [2022-01-28 15:20:28,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=884, Invalid=3538, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 15:20:28,806 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 300 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:28,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 222 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-28 15:20:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 101. [2022-01-28 15:20:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.16) internal successors, (216), 100 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 216 transitions. [2022-01-28 15:20:28,810 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 216 transitions. Word has length 23 [2022-01-28 15:20:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:28,810 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 216 transitions. [2022-01-28 15:20:28,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2022-01-28 15:20:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 216 transitions. [2022-01-28 15:20:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:28,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:28,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:28,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:29,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:29,018 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash 232463731, now seen corresponding path program 18 times [2022-01-28 15:20:29,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658010155] [2022-01-28 15:20:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:29,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:29,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:29,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658010155] [2022-01-28 15:20:29,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658010155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:29,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382834119] [2022-01-28 15:20:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:29,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:29,204 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) [2022-01-28 15:20:29,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:20:29,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:20:29,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:29,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:29,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382834119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:29,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:29,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-28 15:20:29,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166787975] [2022-01-28 15:20:29,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:29,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:29,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:29,842 INFO L87 Difference]: Start difference. First operand 101 states and 216 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:31,532 INFO L93 Difference]: Finished difference Result 272 states and 497 transitions. [2022-01-28 15:20:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:20:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:31,533 INFO L225 Difference]: With dead ends: 272 [2022-01-28 15:20:31,534 INFO L226 Difference]: Without dead ends: 219 [2022-01-28 15:20:31,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=909, Invalid=4493, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 15:20:31,535 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 364 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:31,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 367 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-28 15:20:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 108. [2022-01-28 15:20:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.205607476635514) internal successors, (236), 107 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 236 transitions. [2022-01-28 15:20:31,538 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 236 transitions. Word has length 23 [2022-01-28 15:20:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:31,538 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 236 transitions. [2022-01-28 15:20:31,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 236 transitions. [2022-01-28 15:20:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:31,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:31,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:31,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:31,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:31,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1032464129, now seen corresponding path program 19 times [2022-01-28 15:20:31,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:31,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170391014] [2022-01-28 15:20:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:31,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:31,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:31,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170391014] [2022-01-28 15:20:31,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170391014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:31,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279200064] [2022-01-28 15:20:31,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:31,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:31,924 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) [2022-01-28 15:20:31,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:20:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:31,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:32,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279200064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:32,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:32,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-28 15:20:32,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474190318] [2022-01-28 15:20:32,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:32,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:20:32,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:20:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:20:32,491 INFO L87 Difference]: Start difference. First operand 108 states and 236 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:33,894 INFO L93 Difference]: Finished difference Result 224 states and 405 transitions. [2022-01-28 15:20:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:20:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 15:20:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:33,895 INFO L225 Difference]: With dead ends: 224 [2022-01-28 15:20:33,895 INFO L226 Difference]: Without dead ends: 188 [2022-01-28 15:20:33,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=747, Invalid=3285, Unknown=0, NotChecked=0, Total=4032 [2022-01-28 15:20:33,896 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 380 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:33,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 230 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-28 15:20:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 103. [2022-01-28 15:20:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2022-01-28 15:20:33,899 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 23 [2022-01-28 15:20:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:33,899 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2022-01-28 15:20:33,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2022-01-28 15:20:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:33,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:33,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:33,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-28 15:20:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:34,120 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1847881701, now seen corresponding path program 20 times [2022-01-28 15:20:34,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:34,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361666333] [2022-01-28 15:20:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:34,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:34,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361666333] [2022-01-28 15:20:34,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361666333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281716733] [2022-01-28 15:20:34,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:34,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:34,284 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) [2022-01-28 15:20:34,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:20:34,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:34,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:34,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:34,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281716733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:34,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:34,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-28 15:20:34,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793076090] [2022-01-28 15:20:34,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:34,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:20:34,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:20:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:34,892 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:35,938 INFO L93 Difference]: Finished difference Result 244 states and 464 transitions. [2022-01-28 15:20:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:20:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 23 [2022-01-28 15:20:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:35,940 INFO L225 Difference]: With dead ends: 244 [2022-01-28 15:20:35,940 INFO L226 Difference]: Without dead ends: 223 [2022-01-28 15:20:35,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 15:20:35,941 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 236 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:35,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 249 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-28 15:20:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 116. [2022-01-28 15:20:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.130434782608696) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 245 transitions. [2022-01-28 15:20:35,947 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 245 transitions. Word has length 23 [2022-01-28 15:20:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 245 transitions. [2022-01-28 15:20:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 245 transitions. [2022-01-28 15:20:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:35,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:35,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:35,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:36,163 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,SelfDestructingSolverStorable21 [2022-01-28 15:20:36,164 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1684529905, now seen corresponding path program 21 times [2022-01-28 15:20:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967990170] [2022-01-28 15:20:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:36,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:36,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967990170] [2022-01-28 15:20:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967990170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859841517] [2022-01-28 15:20:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:36,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:36,321 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) [2022-01-28 15:20:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:20:36,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:20:36,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:36,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:36,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:36,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859841517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:36,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:36,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-28 15:20:36,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97243634] [2022-01-28 15:20:36,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:36,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:20:36,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:20:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:36,792 INFO L87 Difference]: Start difference. First operand 116 states and 245 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:38,427 INFO L93 Difference]: Finished difference Result 262 states and 479 transitions. [2022-01-28 15:20:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 15:20:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 23 [2022-01-28 15:20:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:38,428 INFO L225 Difference]: With dead ends: 262 [2022-01-28 15:20:38,428 INFO L226 Difference]: Without dead ends: 229 [2022-01-28 15:20:38,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=889, Invalid=3667, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:20:38,429 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 399 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:38,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 234 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-28 15:20:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 99. [2022-01-28 15:20:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 98 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 199 transitions. [2022-01-28 15:20:38,432 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 199 transitions. Word has length 23 [2022-01-28 15:20:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:38,432 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 199 transitions. [2022-01-28 15:20:38,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 199 transitions. [2022-01-28 15:20:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 15:20:38,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:38,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:38,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:38,647 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,SelfDestructingSolverStorable22 [2022-01-28 15:20:38,647 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1752075113, now seen corresponding path program 22 times [2022-01-28 15:20:38,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:38,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741198056] [2022-01-28 15:20:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:38,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:38,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741198056] [2022-01-28 15:20:38,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741198056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309487256] [2022-01-28 15:20:38,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:38,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:38,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:38,796 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) [2022-01-28 15:20:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 15:20:38,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:38,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:20:38,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:38,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:39,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309487256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:39,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:39,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-01-28 15:20:39,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222112072] [2022-01-28 15:20:39,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:20:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:20:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:20:39,218 INFO L87 Difference]: Start difference. First operand 99 states and 199 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:40,101 INFO L93 Difference]: Finished difference Result 155 states and 303 transitions. [2022-01-28 15:20:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 15:20:40,101 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 23 [2022-01-28 15:20:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:40,102 INFO L225 Difference]: With dead ends: 155 [2022-01-28 15:20:40,102 INFO L226 Difference]: Without dead ends: 141 [2022-01-28 15:20:40,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=542, Invalid=2214, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:20:40,103 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 247 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:40,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 100 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:20:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-28 15:20:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 80. [2022-01-28 15:20:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 79 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 155 transitions. [2022-01-28 15:20:40,105 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 155 transitions. Word has length 23 [2022-01-28 15:20:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:40,105 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 155 transitions. [2022-01-28 15:20:40,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-01-28 15:20:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 155 transitions. [2022-01-28 15:20:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:40,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:40,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:40,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:40,319 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1683696561, now seen corresponding path program 23 times [2022-01-28 15:20:40,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538016487] [2022-01-28 15:20:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:40,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:40,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538016487] [2022-01-28 15:20:40,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538016487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788228716] [2022-01-28 15:20:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:40,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:40,465 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) [2022-01-28 15:20:40,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 15:20:40,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:20:40,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:40,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:40,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:41,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788228716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:41,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:41,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-01-28 15:20:41,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004555167] [2022-01-28 15:20:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:41,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:20:41,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:20:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:20:41,154 INFO L87 Difference]: Start difference. First operand 80 states and 155 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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) [2022-01-28 15:20:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:42,647 INFO L93 Difference]: Finished difference Result 223 states and 390 transitions. [2022-01-28 15:20:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:20:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:42,649 INFO L225 Difference]: With dead ends: 223 [2022-01-28 15:20:42,649 INFO L226 Difference]: Without dead ends: 174 [2022-01-28 15:20:42,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1141, Invalid=5339, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:20:42,650 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 280 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 314 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-28 15:20:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 87. [2022-01-28 15:20:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2022-01-28 15:20:42,652 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 25 [2022-01-28 15:20:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:42,652 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2022-01-28 15:20:42,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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) [2022-01-28 15:20:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2022-01-28 15:20:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:42,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:42,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:42,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-28 15:20:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:42,867 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1961201765, now seen corresponding path program 24 times [2022-01-28 15:20:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446236382] [2022-01-28 15:20:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:43,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446236382] [2022-01-28 15:20:43,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446236382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767848880] [2022-01-28 15:20:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:43,008 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) [2022-01-28 15:20:43,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:20:43,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:43,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:43,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 15:20:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767848880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:43,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:43,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-01-28 15:20:43,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993518591] [2022-01-28 15:20:43,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:43,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:20:43,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:20:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:20:43,537 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2022-01-28 15:20:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:45,342 INFO L93 Difference]: Finished difference Result 345 states and 625 transitions. [2022-01-28 15:20:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-28 15:20:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:45,343 INFO L225 Difference]: With dead ends: 345 [2022-01-28 15:20:45,343 INFO L226 Difference]: Without dead ends: 317 [2022-01-28 15:20:45,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1974, Invalid=8738, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:20:45,344 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 408 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:45,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 233 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-28 15:20:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 128. [2022-01-28 15:20:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1338582677165356) internal successors, (271), 127 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 271 transitions. [2022-01-28 15:20:45,351 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 271 transitions. Word has length 25 [2022-01-28 15:20:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:45,351 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 271 transitions. [2022-01-28 15:20:45,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2022-01-28 15:20:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 271 transitions. [2022-01-28 15:20:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:45,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:45,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:45,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:45,566 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,SelfDestructingSolverStorable25 [2022-01-28 15:20:45,567 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 272905729, now seen corresponding path program 25 times [2022-01-28 15:20:45,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:45,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836052078] [2022-01-28 15:20:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:45,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:45,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836052078] [2022-01-28 15:20:45,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836052078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994999932] [2022-01-28 15:20:45,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:45,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:45,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:45,703 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) [2022-01-28 15:20:45,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 15:20:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:45,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:46,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:46,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994999932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:46,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:46,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-01-28 15:20:46,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471110402] [2022-01-28 15:20:46,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:46,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:20:46,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:20:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:20:46,244 INFO L87 Difference]: Start difference. First operand 128 states and 271 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2022-01-28 15:20:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:47,456 INFO L93 Difference]: Finished difference Result 232 states and 448 transitions. [2022-01-28 15:20:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 15:20:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:47,457 INFO L225 Difference]: With dead ends: 232 [2022-01-28 15:20:47,457 INFO L226 Difference]: Without dead ends: 211 [2022-01-28 15:20:47,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1226, Invalid=5914, Unknown=0, NotChecked=0, Total=7140 [2022-01-28 15:20:47,472 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 248 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:47,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 303 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-28 15:20:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2022-01-28 15:20:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1366906474820144) internal successors, (297), 139 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 297 transitions. [2022-01-28 15:20:47,489 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 297 transitions. Word has length 25 [2022-01-28 15:20:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:47,489 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 297 transitions. [2022-01-28 15:20:47,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2022-01-28 15:20:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 297 transitions. [2022-01-28 15:20:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:47,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:47,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:47,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:47,690 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,SelfDestructingSolverStorable26 [2022-01-28 15:20:47,690 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1266191283, now seen corresponding path program 26 times [2022-01-28 15:20:47,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:47,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805665195] [2022-01-28 15:20:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:47,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:47,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805665195] [2022-01-28 15:20:47,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805665195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473426968] [2022-01-28 15:20:47,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:20:47,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:47,781 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) [2022-01-28 15:20:47,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 15:20:47,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:20:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:47,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:48,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473426968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:48,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:48,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 31 [2022-01-28 15:20:48,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673125850] [2022-01-28 15:20:48,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:48,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:20:48,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:20:48,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:20:48,250 INFO L87 Difference]: Start difference. First operand 140 states and 297 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-01-28 15:20:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:49,821 INFO L93 Difference]: Finished difference Result 368 states and 716 transitions. [2022-01-28 15:20:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-28 15:20:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:49,836 INFO L225 Difference]: With dead ends: 368 [2022-01-28 15:20:49,836 INFO L226 Difference]: Without dead ends: 347 [2022-01-28 15:20:49,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1367, Invalid=7189, Unknown=0, NotChecked=0, Total=8556 [2022-01-28 15:20:49,837 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 314 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:49,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 263 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-28 15:20:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 186. [2022-01-28 15:20:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2022-01-28 15:20:49,842 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2022-01-28 15:20:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:49,842 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2022-01-28 15:20:49,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-01-28 15:20:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2022-01-28 15:20:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:49,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:49,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:49,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:50,058 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,SelfDestructingSolverStorable27 [2022-01-28 15:20:50,058 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash 967916211, now seen corresponding path program 27 times [2022-01-28 15:20:50,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227908175] [2022-01-28 15:20:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:50,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:50,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227908175] [2022-01-28 15:20:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227908175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044978827] [2022-01-28 15:20:50,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:20:50,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:50,201 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) [2022-01-28 15:20:50,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:20:50,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:50,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:20:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:50,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 15:20:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:50,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044978827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:50,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:50,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-01-28 15:20:50,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923078079] [2022-01-28 15:20:50,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:50,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:20:50,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:20:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:20:50,789 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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) [2022-01-28 15:20:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:52,301 INFO L93 Difference]: Finished difference Result 414 states and 805 transitions. [2022-01-28 15:20:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-28 15:20:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:52,302 INFO L225 Difference]: With dead ends: 414 [2022-01-28 15:20:52,302 INFO L226 Difference]: Without dead ends: 379 [2022-01-28 15:20:52,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2492 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2022-01-28 15:20:52,303 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 314 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:52,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 280 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:20:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-28 15:20:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 215. [2022-01-28 15:20:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2009345794392523) internal successors, (471), 214 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2022-01-28 15:20:52,307 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 25 [2022-01-28 15:20:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2022-01-28 15:20:52,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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) [2022-01-28 15:20:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2022-01-28 15:20:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:52,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:52,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:52,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:52,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 15:20:52,519 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 28 times [2022-01-28 15:20:52,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:52,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928419283] [2022-01-28 15:20:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:52,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:52,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928419283] [2022-01-28 15:20:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928419283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183421885] [2022-01-28 15:20:52,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:20:52,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:52,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:52,660 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) [2022-01-28 15:20:52,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 15:20:52,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:20:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:52,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:52,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:53,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183421885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:53,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:53,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-01-28 15:20:53,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068078038] [2022-01-28 15:20:53,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:53,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:20:53,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:20:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:20:53,271 INFO L87 Difference]: Start difference. First operand 215 states and 471 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-28 15:20:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:54,371 INFO L93 Difference]: Finished difference Result 372 states and 748 transitions. [2022-01-28 15:20:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:20:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:54,372 INFO L225 Difference]: With dead ends: 372 [2022-01-28 15:20:54,372 INFO L226 Difference]: Without dead ends: 305 [2022-01-28 15:20:54,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1102, Invalid=5704, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 15:20:54,374 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 293 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:54,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 227 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-28 15:20:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 215. [2022-01-28 15:20:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.107476635514019) internal successors, (451), 214 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 451 transitions. [2022-01-28 15:20:54,378 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 451 transitions. Word has length 25 [2022-01-28 15:20:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:54,378 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 451 transitions. [2022-01-28 15:20:54,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-28 15:20:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 451 transitions. [2022-01-28 15:20:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:54,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:54,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:54,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:54,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:54,591 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1977328831, now seen corresponding path program 29 times [2022-01-28 15:20:54,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:54,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284860237] [2022-01-28 15:20:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:54,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:54,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284860237] [2022-01-28 15:20:54,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284860237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403477224] [2022-01-28 15:20:54,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:20:54,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:54,688 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) [2022-01-28 15:20:54,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 15:20:54,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:20:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:54,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:54,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:55,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403477224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:55,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:55,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 31 [2022-01-28 15:20:55,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082193063] [2022-01-28 15:20:55,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:55,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:20:55,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:20:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:20:55,200 INFO L87 Difference]: Start difference. First operand 215 states and 451 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-01-28 15:20:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:57,104 INFO L93 Difference]: Finished difference Result 571 states and 1134 transitions. [2022-01-28 15:20:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:20:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:57,106 INFO L225 Difference]: With dead ends: 571 [2022-01-28 15:20:57,106 INFO L226 Difference]: Without dead ends: 526 [2022-01-28 15:20:57,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=850, Invalid=4700, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 15:20:57,108 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:57,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 181 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-28 15:20:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 374. [2022-01-28 15:20:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.1796246648793565) internal successors, (813), 373 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 813 transitions. [2022-01-28 15:20:57,115 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 813 transitions. Word has length 25 [2022-01-28 15:20:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:57,115 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 813 transitions. [2022-01-28 15:20:57,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-01-28 15:20:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 813 transitions. [2022-01-28 15:20:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:57,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:57,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:57,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:57,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:57,332 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash 769716131, now seen corresponding path program 30 times [2022-01-28 15:20:57,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857045940] [2022-01-28 15:20:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:57,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:57,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:57,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857045940] [2022-01-28 15:20:57,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857045940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:57,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114475624] [2022-01-28 15:20:57,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:20:57,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:57,468 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) [2022-01-28 15:20:57,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 15:20:57,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 15:20:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:20:57,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:20:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:20:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:20:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:58,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114475624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:20:58,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:20:58,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-01-28 15:20:58,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733450807] [2022-01-28 15:20:58,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:20:58,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:20:58,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:20:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:20:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:20:58,020 INFO L87 Difference]: Start difference. First operand 374 states and 813 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-28 15:20:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:20:59,385 INFO L93 Difference]: Finished difference Result 655 states and 1318 transitions. [2022-01-28 15:20:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-28 15:20:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 15:20:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:20:59,400 INFO L225 Difference]: With dead ends: 655 [2022-01-28 15:20:59,400 INFO L226 Difference]: Without dead ends: 565 [2022-01-28 15:20:59,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1351, Invalid=7205, Unknown=0, NotChecked=0, Total=8556 [2022-01-28 15:20:59,403 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 277 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:20:59,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 230 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:20:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-28 15:20:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 356. [2022-01-28 15:20:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.112676056338028) internal successors, (750), 355 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:20:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 750 transitions. [2022-01-28 15:20:59,417 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 750 transitions. Word has length 25 [2022-01-28 15:20:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:20:59,417 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 750 transitions. [2022-01-28 15:20:59,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-28 15:20:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 750 transitions. [2022-01-28 15:20:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 15:20:59,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:20:59,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:20:59,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 15:20:59,643 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,SelfDestructingSolverStorable31 [2022-01-28 15:20:59,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:20:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:20:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1177671531, now seen corresponding path program 31 times [2022-01-28 15:20:59,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:20:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939540513] [2022-01-28 15:20:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:20:59,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:20:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:20:59,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:20:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939540513] [2022-01-28 15:20:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939540513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:20:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765163165] [2022-01-28 15:20:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:20:59,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:20:59,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:20:59,746 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) [2022-01-28 15:20:59,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 15:20:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:20:59,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:20:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765163165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:00,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:00,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 31 [2022-01-28 15:21:00,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162586705] [2022-01-28 15:21:00,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:00,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:21:00,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:21:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:21:00,414 INFO L87 Difference]: Start difference. First operand 356 states and 750 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2022-01-28 15:21:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:02,344 INFO L93 Difference]: Finished difference Result 537 states and 1059 transitions. [2022-01-28 15:21:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-28 15:21:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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 25 [2022-01-28 15:21:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:02,346 INFO L225 Difference]: With dead ends: 537 [2022-01-28 15:21:02,346 INFO L226 Difference]: Without dead ends: 483 [2022-01-28 15:21:02,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1177, Invalid=5629, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 15:21:02,346 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 258 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:02,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 207 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:21:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-28 15:21:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2022-01-28 15:21:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.1054131054131053) internal successors, (739), 351 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 739 transitions. [2022-01-28 15:21:02,351 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 739 transitions. Word has length 25 [2022-01-28 15:21:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:02,352 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 739 transitions. [2022-01-28 15:21:02,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2022-01-28 15:21:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 739 transitions. [2022-01-28 15:21:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:21:02,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:02,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:02,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:02,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:02,575 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:21:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash -376052675, now seen corresponding path program 32 times [2022-01-28 15:21:02,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287098785] [2022-01-28 15:21:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:02,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:02,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287098785] [2022-01-28 15:21:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287098785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227239774] [2022-01-28 15:21:02,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:21:02,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:02,717 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) [2022-01-28 15:21:02,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 15:21:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:21:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:02,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:21:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:03,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:03,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227239774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:03,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:03,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-01-28 15:21:03,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688047278] [2022-01-28 15:21:03,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:03,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:21:03,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:21:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:21:03,361 INFO L87 Difference]: Start difference. First operand 352 states and 739 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:04,713 INFO L93 Difference]: Finished difference Result 615 states and 1218 transitions. [2022-01-28 15:21:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-28 15:21:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 [2022-01-28 15:21:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:04,715 INFO L225 Difference]: With dead ends: 615 [2022-01-28 15:21:04,715 INFO L226 Difference]: Without dead ends: 567 [2022-01-28 15:21:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1517, Invalid=7989, Unknown=0, NotChecked=0, Total=9506 [2022-01-28 15:21:04,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 360 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:04,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 256 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:21:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-28 15:21:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 325. [2022-01-28 15:21:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.0833333333333335) internal successors, (675), 324 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 675 transitions. [2022-01-28 15:21:04,722 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 675 transitions. Word has length 27 [2022-01-28 15:21:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:04,722 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 675 transitions. [2022-01-28 15:21:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 675 transitions. [2022-01-28 15:21:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:21:04,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:04,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:04,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:04,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:04,939 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:21:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash 927667109, now seen corresponding path program 33 times [2022-01-28 15:21:04,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:04,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400408393] [2022-01-28 15:21:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:04,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:05,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400408393] [2022-01-28 15:21:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400408393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232579164] [2022-01-28 15:21:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:21:05,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:05,090 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) [2022-01-28 15:21:05,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 15:21:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:21:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:05,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:21:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:05,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:05,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232579164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:05,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:05,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-01-28 15:21:05,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473169062] [2022-01-28 15:21:05,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:05,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:21:05,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:21:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:21:05,786 INFO L87 Difference]: Start difference. First operand 325 states and 675 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:07,186 INFO L93 Difference]: Finished difference Result 497 states and 992 transitions. [2022-01-28 15:21:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:21:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 [2022-01-28 15:21:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:07,187 INFO L225 Difference]: With dead ends: 497 [2022-01-28 15:21:07,188 INFO L226 Difference]: Without dead ends: 479 [2022-01-28 15:21:07,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2022-01-28 15:21:07,188 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 351 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:07,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 119 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:21:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-28 15:21:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 175. [2022-01-28 15:21:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0632183908045976) internal successors, (359), 174 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 359 transitions. [2022-01-28 15:21:07,192 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 359 transitions. Word has length 27 [2022-01-28 15:21:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:07,192 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 359 transitions. [2022-01-28 15:21:07,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 359 transitions. [2022-01-28 15:21:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:21:07,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:07,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:07,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:07,393 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,SelfDestructingSolverStorable34 [2022-01-28 15:21:07,393 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:21:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1133192693, now seen corresponding path program 34 times [2022-01-28 15:21:07,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:07,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292534529] [2022-01-28 15:21:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:07,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:07,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:07,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292534529] [2022-01-28 15:21:07,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292534529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990050634] [2022-01-28 15:21:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:21:07,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:07,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:07,549 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) [2022-01-28 15:21:07,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 15:21:07,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:21:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:07,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:21:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:08,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:21:08,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990050634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:08,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:08,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-01-28 15:21:08,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767750682] [2022-01-28 15:21:08,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:08,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:21:08,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:21:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:21:08,410 INFO L87 Difference]: Start difference. First operand 175 states and 359 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:09,427 INFO L93 Difference]: Finished difference Result 296 states and 581 transitions. [2022-01-28 15:21:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 15:21:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 [2022-01-28 15:21:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:09,429 INFO L225 Difference]: With dead ends: 296 [2022-01-28 15:21:09,429 INFO L226 Difference]: Without dead ends: 272 [2022-01-28 15:21:09,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=817, Invalid=4013, Unknown=0, NotChecked=0, Total=4830 [2022-01-28 15:21:09,429 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 267 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:09,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 109 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:21:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-28 15:21:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 101. [2022-01-28 15:21:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.92) internal successors, (192), 100 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 192 transitions. [2022-01-28 15:21:09,432 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 192 transitions. Word has length 27 [2022-01-28 15:21:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:09,432 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 192 transitions. [2022-01-28 15:21:09,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-28 15:21:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 192 transitions. [2022-01-28 15:21:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 15:21:09,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:21:09,432 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:21:09,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:09,633 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,SelfDestructingSolverStorable35 [2022-01-28 15:21:09,633 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 15:21:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:21:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1533688995, now seen corresponding path program 35 times [2022-01-28 15:21:09,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:21:09,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095344543] [2022-01-28 15:21:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:21:09,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:21:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:21:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:09,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:21:09,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095344543] [2022-01-28 15:21:09,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095344543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:21:09,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854420649] [2022-01-28 15:21:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:21:09,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:21:09,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:21:09,783 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) [2022-01-28 15:21:09,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 15:21:09,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-28 15:21:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:21:09,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-28 15:21:09,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:21:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:21:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:21:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:21:10,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854420649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:21:10,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:21:10,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 37 [2022-01-28 15:21:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004734614] [2022-01-28 15:21:10,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:21:10,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-28 15:21:10,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:21:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-28 15:21:10,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:21:10,516 INFO L87 Difference]: Start difference. First operand 101 states and 192 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:21:12,061 INFO L93 Difference]: Finished difference Result 201 states and 376 transitions. [2022-01-28 15:21:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:21:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 15:21:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:21:12,062 INFO L225 Difference]: With dead ends: 201 [2022-01-28 15:21:12,062 INFO L226 Difference]: Without dead ends: 0 [2022-01-28 15:21:12,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1231, Invalid=6779, Unknown=0, NotChecked=0, Total=8010 [2022-01-28 15:21:12,062 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 246 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:21:12,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 175 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:21:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-28 15:21:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-28 15:21:12,063 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) [2022-01-28 15:21:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-28 15:21:12,063 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2022-01-28 15:21:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:21:12,063 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-28 15:21:12,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:21:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-28 15:21:12,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-28 15:21:12,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-28 15:21:12,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-28 15:21:12,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-28 15:21:12,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 15:21:12,269 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,SelfDestructingSolverStorable36 [2022-01-28 15:21:12,272 INFO L732 BasicCegarLoop]: Path program histogram: [35, 1, 1] [2022-01-28 15:21:12,273 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 15:21:12,273 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 15:21:12,275 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:21:12 BasicIcfg [2022-01-28 15:21:12,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 15:21:12,275 INFO L158 Benchmark]: Toolchain (without parser) took 76090.85ms. Allocated memory was 234.9MB in the beginning and 463.5MB in the end (delta: 228.6MB). Free memory was 191.7MB in the beginning and 400.5MB in the end (delta: -208.8MB). Peak memory consumption was 21.9MB. Max. memory is 8.0GB. [2022-01-28 15:21:12,275 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 234.9MB. Free memory is still 192.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:21:12,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.49ms. Allocated memory is still 234.9MB. Free memory was 191.6MB in the beginning and 190.1MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-28 15:21:12,275 INFO L158 Benchmark]: Boogie Preprocessor took 10.16ms. Allocated memory is still 234.9MB. Free memory was 190.1MB in the beginning and 189.1MB in the end (delta: 974.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 15:21:12,275 INFO L158 Benchmark]: RCFGBuilder took 245.64ms. Allocated memory is still 234.9MB. Free memory was 189.1MB in the beginning and 180.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-28 15:21:12,275 INFO L158 Benchmark]: TraceAbstraction took 75798.37ms. Allocated memory was 234.9MB in the beginning and 463.5MB in the end (delta: 228.6MB). Free memory was 179.8MB in the beginning and 400.5MB in the end (delta: -220.7MB). Peak memory consumption was 8.3MB. Max. memory is 8.0GB. [2022-01-28 15:21:12,276 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 234.9MB. Free memory is still 192.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.49ms. Allocated memory is still 234.9MB. Free memory was 191.6MB in the beginning and 190.1MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.16ms. Allocated memory is still 234.9MB. Free memory was 190.1MB in the beginning and 189.1MB in the end (delta: 974.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 245.64ms. Allocated memory is still 234.9MB. Free memory was 189.1MB in the beginning and 180.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 75798.37ms. Allocated memory was 234.9MB in the beginning and 463.5MB in the end (delta: 228.6MB). Free memory was 179.8MB in the beginning and 400.5MB in the end (delta: -220.7MB). Peak memory consumption was 8.3MB. Max. memory is 8.0GB. * 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: 50]: 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, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 75.7s, OverallIterations: 37, TraceHistogramMax: 5, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 39.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8830 SdHoareTripleChecker+Valid, 10.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8830 mSDsluCounter, 7261 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11502 mSDsCounter, 3164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27925 IncrementalHoareTripleChecker+Invalid, 31089 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3164 mSolverCounterUnsat, 642 mSDtfsCounter, 27925 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3231 GetRequests, 910 SyntacticMatches, 87 SemanticMatches, 2234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47866 ImplicationChecksByTransitivity, 39.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=374occurred in iteration=31, InterpolantAutomatonStates: 1597, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 37 MinimizatonAttempts, 3745 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 1654 NumberOfCodeBlocks, 1654 NumberOfCodeBlocksAsserted, 131 NumberOfCheckSat, 2358 ConstructedInterpolants, 0 QuantifiedInterpolants, 37887 SizeOfPredicates, 315 NumberOfNonLiveVariables, 1695 ConjunctsInSsa, 870 ConjunctsInUnsatCore, 107 InterpolantComputations, 2 PerfectInterpolantSequences, 66/1018 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! [2022-01-28 15:21:12,310 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...