/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:32:08,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:32:08,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:32:08,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 20:32:08,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:32:08,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:32:08,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:32:08,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:32:08,580 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:32:08,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:32:08,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:32:08,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:32:08,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:32:08,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:32:08,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:32:08,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:32:08,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:32:08,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:32:08,584 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:32:08,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:32:08,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:32:08,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:32:08,773 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:32:08,774 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:32:08,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2022-03-15 20:32:08,776 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2022-03-15 20:32:08,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:32:08,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:32:08,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:32:08,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:32:08,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:32:08,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,816 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:32:08,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:32:08,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:32:08,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:32:08,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:32:08,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:32:08,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:32:08,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:32:08,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:32:08,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/1) ... [2022-03-15 20:32:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:32:08,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:08,849 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) [2022-03-15 20:32:08,851 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 [2022-03-15 20:32:08,875 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 20:32:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:32:08,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2022-03-15 20:32:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2022-03-15 20:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2022-03-15 20:32:08,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2022-03-15 20:32:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2022-03-15 20:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2022-03-15 20:32:08,877 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:32:08,911 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:32:08,912 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:32:09,003 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:32:09,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:32:09,025 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:32:09,026 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:32:09 BoogieIcfgContainer [2022-03-15 20:32:09,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:32:09,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:32:09,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:32:09,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:32:09,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:08" (1/2) ... [2022-03-15 20:32:09,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c3b083 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:32:09, skipping insertion in model container [2022-03-15 20:32:09,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:32:09" (2/2) ... [2022-03-15 20:32:09,034 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2022-03-15 20:32:09,037 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:32:09,037 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:32:09,037 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:32:09,037 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:32:09,079 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 20:32:09,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:32:09,129 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:32:09,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 20:32:09,141 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:32:09,154 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 20 transitions, 62 flow [2022-03-15 20:32:09,157 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 20 transitions, 62 flow [2022-03-15 20:32:09,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 20 transitions, 62 flow [2022-03-15 20:32:09,178 INFO L129 PetriNetUnfolder]: 3/18 cut-off events. [2022-03-15 20:32:09,178 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-03-15 20:32:09,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 18 events. 3/18 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 13. Up to 3 conditions per place. [2022-03-15 20:32:09,186 INFO L116 LiptonReduction]: Number of co-enabled transitions 56 [2022-03-15 20:32:09,297 INFO L131 LiptonReduction]: Checked pairs total: 48 [2022-03-15 20:32:09,297 INFO L133 LiptonReduction]: Total number of compositions: 5 [2022-03-15 20:32:09,308 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 52 flow [2022-03-15 20:32:09,330 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 20:32:09,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:09,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:09,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1583455051, now seen corresponding path program 1 times [2022-03-15 20:32:09,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:09,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337418374] [2022-03-15 20:32:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:09,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:09,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337418374] [2022-03-15 20:32:09,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337418374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:09,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:09,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:09,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [727024663] [2022-03-15 20:32:09,502 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:09,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:09,511 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 20:32:09,511 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:09,616 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57#(not (= T2Thread1of1ForFork1_thidvar0 1))] [2022-03-15 20:32:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:09,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:09,636 INFO L87 Difference]: Start difference. First operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:09,673 INFO L93 Difference]: Finished difference Result 12 states and 20 transitions. [2022-03-15 20:32:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:32:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 8 [2022-03-15 20:32:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:09,681 INFO L225 Difference]: With dead ends: 12 [2022-03-15 20:32:09,681 INFO L226 Difference]: Without dead ends: 12 [2022-03-15 20:32:09,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:09,687 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:09,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-03-15 20:32:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-03-15 20:32:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 20 transitions. [2022-03-15 20:32:09,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 20 transitions. Word has length 8 [2022-03-15 20:32:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:09,713 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 20 transitions. [2022-03-15 20:32:09,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 20 transitions. [2022-03-15 20:32:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 20:32:09,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:09,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:09,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:32:09,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1583628961, now seen corresponding path program 1 times [2022-03-15 20:32:09,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:09,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726575981] [2022-03-15 20:32:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:09,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:09,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726575981] [2022-03-15 20:32:09,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726575981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:09,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:09,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 20:32:09,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [917523341] [2022-03-15 20:32:09,753 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:09,754 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:09,758 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 20:32:09,758 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:09,800 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:09,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:32:09,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:32:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:32:09,802 INFO L87 Difference]: Start difference. First operand 12 states and 20 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:09,819 INFO L93 Difference]: Finished difference Result 21 states and 37 transitions. [2022-03-15 20:32:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:32:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-03-15 20:32:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:09,824 INFO L225 Difference]: With dead ends: 21 [2022-03-15 20:32:09,824 INFO L226 Difference]: Without dead ends: 18 [2022-03-15 20:32:09,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:32:09,825 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:09,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-15 20:32:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-15 20:32:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2022-03-15 20:32:09,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 8 [2022-03-15 20:32:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:09,829 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2022-03-15 20:32:09,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2022-03-15 20:32:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 20:32:09,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:09,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:09,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:32:09,830 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1818453629, now seen corresponding path program 1 times [2022-03-15 20:32:09,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:09,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053086149] [2022-03-15 20:32:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:09,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:09,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:09,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053086149] [2022-03-15 20:32:09,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053086149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:09,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:09,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:09,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [225500606] [2022-03-15 20:32:09,874 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:09,875 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:09,876 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 20:32:09,876 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:09,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [158#(<= n x)] [2022-03-15 20:32:09,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:32:09,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:32:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:09,922 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:09,979 INFO L93 Difference]: Finished difference Result 21 states and 35 transitions. [2022-03-15 20:32:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 20:32:09,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 9 [2022-03-15 20:32:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:09,980 INFO L225 Difference]: With dead ends: 21 [2022-03-15 20:32:09,980 INFO L226 Difference]: Without dead ends: 17 [2022-03-15 20:32:09,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 20:32:09,981 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:09,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-15 20:32:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-15 20:32:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2022-03-15 20:32:09,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 9 [2022-03-15 20:32:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:09,984 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2022-03-15 20:32:09,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2022-03-15 20:32:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 20:32:09,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:09,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:09,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 20:32:09,985 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1904341082, now seen corresponding path program 1 times [2022-03-15 20:32:09,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:09,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686519417] [2022-03-15 20:32:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:10,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686519417] [2022-03-15 20:32:10,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686519417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:10,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693243729] [2022-03-15 20:32:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:10,012 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) [2022-03-15 20:32:10,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 20:32:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 20:32:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693243729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:10,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:10,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-15 20:32:10,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [962506135] [2022-03-15 20:32:10,085 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:10,085 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:10,086 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 20:32:10,086 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:10,141 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [271#(< y n), 272#(or (< (+ y 1) n) (not (< y n)))] [2022-03-15 20:32:10,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 20:32:10,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 20:32:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-15 20:32:10,142 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:10,186 INFO L93 Difference]: Finished difference Result 19 states and 34 transitions. [2022-03-15 20:32:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 20:32:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 9 [2022-03-15 20:32:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:10,187 INFO L225 Difference]: With dead ends: 19 [2022-03-15 20:32:10,187 INFO L226 Difference]: Without dead ends: 19 [2022-03-15 20:32:10,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-15 20:32:10,188 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-15 20:32:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-15 20:32:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 34 transitions. [2022-03-15 20:32:10,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 34 transitions. Word has length 9 [2022-03-15 20:32:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:10,191 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 34 transitions. [2022-03-15 20:32:10,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 34 transitions. [2022-03-15 20:32:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 20:32:10,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:10,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:10,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:10,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 561681598, now seen corresponding path program 1 times [2022-03-15 20:32:10,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:10,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129994413] [2022-03-15 20:32:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:10,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129994413] [2022-03-15 20:32:10,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129994413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:10,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724205099] [2022-03-15 20:32:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:10,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:10,488 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) [2022-03-15 20:32:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 20:32:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:10,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 20:32:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:10,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724205099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:10,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:10,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-15 20:32:10,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094639172] [2022-03-15 20:32:10,604 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:10,604 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:10,605 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2022-03-15 20:32:10,605 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:10,681 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [390#(= (+ x 1) y)] [2022-03-15 20:32:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:32:10,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:32:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:10,682 INFO L87 Difference]: Start difference. First operand 19 states and 34 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:10,719 INFO L93 Difference]: Finished difference Result 49 states and 89 transitions. [2022-03-15 20:32:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:32:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 10 [2022-03-15 20:32:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:10,720 INFO L225 Difference]: With dead ends: 49 [2022-03-15 20:32:10,720 INFO L226 Difference]: Without dead ends: 46 [2022-03-15 20:32:10,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 11 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:10,721 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:10,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-15 20:32:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-03-15 20:32:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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) [2022-03-15 20:32:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2022-03-15 20:32:10,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 10 [2022-03-15 20:32:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:10,725 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2022-03-15 20:32:10,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2022-03-15 20:32:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 20:32:10,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:10,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:10,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 20:32:10,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:10,937 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1405079142, now seen corresponding path program 2 times [2022-03-15 20:32:10,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:10,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344784374] [2022-03-15 20:32:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344784374] [2022-03-15 20:32:11,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344784374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:11,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415885630] [2022-03-15 20:32:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:32:11,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:11,014 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) [2022-03-15 20:32:11,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 20:32:11,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:32:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:32:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415885630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:11,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:11,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 20:32:11,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436027119] [2022-03-15 20:32:11,146 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,148 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2022-03-15 20:32:11,148 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:11,307 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [572#(or (< (+ x 1) n) (not (< x n))), 575#(or (< (+ 2 x) n) (<= n (+ x 1))), 573#(or (< x n) (<= (+ y 1) n)), 574#(or (< (+ x 1) n) (<= (+ y 1) n) (not (< x n))), 571#(< x n), 576#(or (< (+ 2 x) n) (<= n (+ x 1)) (<= (+ y 1) n))] [2022-03-15 20:32:11,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 20:32:11,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 20:32:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 20:32:11,308 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:11,590 INFO L93 Difference]: Finished difference Result 51 states and 107 transitions. [2022-03-15 20:32:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 20:32:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 20:32:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:11,591 INFO L225 Difference]: With dead ends: 51 [2022-03-15 20:32:11,591 INFO L226 Difference]: Without dead ends: 51 [2022-03-15 20:32:11,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-03-15 20:32:11,592 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:11,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-15 20:32:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-03-15 20:32:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2022-03-15 20:32:11,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 11 [2022-03-15 20:32:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2022-03-15 20:32:11,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2022-03-15 20:32:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 20:32:11,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:11,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:11,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 232323591, now seen corresponding path program 3 times [2022-03-15 20:32:11,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271973667] [2022-03-15 20:32:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271973667] [2022-03-15 20:32:11,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271973667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:11,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045374839] [2022-03-15 20:32:11,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:32:11,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:11,860 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) [2022-03-15 20:32:11,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 20:32:11,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 20:32:11,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:32:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045374839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:11,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:11,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 20:32:11,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616996270] [2022-03-15 20:32:11,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,927 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,928 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2022-03-15 20:32:11,928 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:12,019 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [794#(or (< (+ x 1) n) (not (< x n))), 795#(or (< x n) (<= n y)), 793#(< x n), 796#(or (< (+ x 1) n) (<= n y) (not (< x n)))] [2022-03-15 20:32:12,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 20:32:12,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 20:32:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 20:32:12,021 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:12,184 INFO L93 Difference]: Finished difference Result 60 states and 119 transitions. [2022-03-15 20:32:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 20:32:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 20:32:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:12,188 INFO L225 Difference]: With dead ends: 60 [2022-03-15 20:32:12,188 INFO L226 Difference]: Without dead ends: 53 [2022-03-15 20:32:12,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-03-15 20:32:12,189 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:12,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-15 20:32:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-03-15 20:32:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 92 transitions. [2022-03-15 20:32:12,200 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 92 transitions. Word has length 11 [2022-03-15 20:32:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:12,200 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 92 transitions. [2022-03-15 20:32:12,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 92 transitions. [2022-03-15 20:32:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 20:32:12,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:12,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:12,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:12,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:12,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash -607717205, now seen corresponding path program 4 times [2022-03-15 20:32:12,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:12,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391123199] [2022-03-15 20:32:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:12,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:12,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391123199] [2022-03-15 20:32:12,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391123199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:12,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17437678] [2022-03-15 20:32:12,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 20:32:12,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:12,492 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) [2022-03-15 20:32:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 20:32:12,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 20:32:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 20:32:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:12,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:12,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17437678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:12,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:12,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-15 20:32:12,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1398867107] [2022-03-15 20:32:12,586 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:12,587 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:12,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 42 transitions. [2022-03-15 20:32:12,588 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:12,760 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1029#(= y (+ 2 x)), 1028#(= (+ x 1) y)] [2022-03-15 20:32:12,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 20:32:12,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 20:32:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 20:32:12,761 INFO L87 Difference]: Start difference. First operand 40 states and 92 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:12,870 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2022-03-15 20:32:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 20:32:12,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 12 [2022-03-15 20:32:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:12,871 INFO L225 Difference]: With dead ends: 107 [2022-03-15 20:32:12,871 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 20:32:12,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 14 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 20:32:12,871 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:12,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 1 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 20:32:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 57. [2022-03-15 20:32:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2022-03-15 20:32:12,876 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 12 [2022-03-15 20:32:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:12,877 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2022-03-15 20:32:12,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2022-03-15 20:32:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 20:32:12,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:12,877 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:12,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,088 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 868853412, now seen corresponding path program 5 times [2022-03-15 20:32:13,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:13,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893564010] [2022-03-15 20:32:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:13,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893564010] [2022-03-15 20:32:13,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893564010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:13,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633176053] [2022-03-15 20:32:13,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 20:32:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:13,115 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) [2022-03-15 20:32:13,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 20:32:13,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 20:32:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 20:32:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633176053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:13,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:13,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 20:32:13,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1038850671] [2022-03-15 20:32:13,182 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:13,183 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:13,184 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2022-03-15 20:32:13,184 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:13,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1327#(<= n (+ x 1)), 1330#(<= n (+ 2 x)), 1328#(or (<= (+ 2 y) n) (not (< y n))), 1329#(or (<= (+ y 1) x) (not (< y n))), 1326#(<= n x)] [2022-03-15 20:32:13,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 20:32:13,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 20:32:13,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 20:32:13,334 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:13,523 INFO L93 Difference]: Finished difference Result 118 states and 246 transitions. [2022-03-15 20:32:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 20:32:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 12 [2022-03-15 20:32:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:13,524 INFO L225 Difference]: With dead ends: 118 [2022-03-15 20:32:13,525 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 20:32:13,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2022-03-15 20:32:13,526 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:13,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 20:32:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 65. [2022-03-15 20:32:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 151 transitions. [2022-03-15 20:32:13,538 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 151 transitions. Word has length 12 [2022-03-15 20:32:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:13,538 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 151 transitions. [2022-03-15 20:32:13,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 151 transitions. [2022-03-15 20:32:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 20:32:13,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:13,539 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:13,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,765 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash -879178105, now seen corresponding path program 6 times [2022-03-15 20:32:13,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:13,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375990114] [2022-03-15 20:32:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:13,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375990114] [2022-03-15 20:32:13,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375990114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:13,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169386512] [2022-03-15 20:32:13,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 20:32:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:13,803 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) [2022-03-15 20:32:13,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 20:32:13,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 20:32:13,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:13,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 20:32:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169386512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:13,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:13,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-15 20:32:13,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1895224101] [2022-03-15 20:32:13,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:13,869 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:13,879 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 51 transitions. [2022-03-15 20:32:13,879 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:14,218 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [1690#(or (<= n (+ 2 x)) (< (+ 3 x) n)), 1684#(< x n), 1686#(or (< (+ 2 x) n) (<= n (+ x 1))), 1695#(or (<= n (+ 2 x)) (<= (+ 2 y) n) (< (+ 3 x) n)), 1688#(or (< (+ x 1) n) (<= (+ y 1) n) (not (< x n))), 1692#(or (<= (+ 2 y) n) (< x n)), 1693#(or (< (+ x 1) n) (<= (+ 2 y) n) (not (< x n))), 1689#(or (< (+ 2 x) n) (<= n (+ x 1)) (<= (+ y 1) n)), 1687#(or (< x n) (<= (+ y 1) n)), 1694#(or (< (+ 2 x) n) (<= (+ 2 y) n) (<= n (+ x 1))), 1691#(or (<= n (+ 2 x)) (< (+ 3 x) n) (<= (+ y 1) n)), 1685#(or (< (+ x 1) n) (not (< x n)))] [2022-03-15 20:32:14,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 20:32:14,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 20:32:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-03-15 20:32:14,219 INFO L87 Difference]: Start difference. First operand 65 states and 151 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:14,809 INFO L93 Difference]: Finished difference Result 157 states and 376 transitions. [2022-03-15 20:32:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 20:32:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 20:32:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:14,811 INFO L225 Difference]: With dead ends: 157 [2022-03-15 20:32:14,811 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 20:32:14,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 20:32:14,812 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:14,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:32:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 20:32:14,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 91. [2022-03-15 20:32:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.6444444444444444) internal successors, (238), 90 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 238 transitions. [2022-03-15 20:32:14,817 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 238 transitions. Word has length 13 [2022-03-15 20:32:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:14,817 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 238 transitions. [2022-03-15 20:32:14,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 238 transitions. [2022-03-15 20:32:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 20:32:14,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:14,818 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:14,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 20:32:15,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:15,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1659300934, now seen corresponding path program 7 times [2022-03-15 20:32:15,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:15,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854235465] [2022-03-15 20:32:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:15,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:15,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854235465] [2022-03-15 20:32:15,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854235465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:15,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168552659] [2022-03-15 20:32:15,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 20:32:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:15,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:15,064 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) [2022-03-15 20:32:15,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 20:32:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:15,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 20:32:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:15,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168552659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:15,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:15,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-15 20:32:15,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1057290150] [2022-03-15 20:32:15,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:15,130 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:15,131 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 51 transitions. [2022-03-15 20:32:15,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:15,347 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [2174#(< x n), 2181#(or (< (+ 2 x) n) (<= n (+ x 1)) (<= n y)), 2178#(or (<= n (+ y 1)) (< x n)), 2175#(or (< (+ x 1) n) (not (< x n))), 2176#(or (< x n) (<= n y)), 2182#(or (< (+ 2 x) n) (<= n (+ y 1)) (<= n (+ x 1))), 2180#(or (< (+ 2 x) n) (<= n (+ x 1))), 2177#(or (< (+ x 1) n) (<= n y) (not (< x n))), 2179#(or (< (+ x 1) n) (<= n (+ y 1)) (<= n x))] [2022-03-15 20:32:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 20:32:15,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 20:32:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-15 20:32:15,348 INFO L87 Difference]: Start difference. First operand 91 states and 238 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:15,822 INFO L93 Difference]: Finished difference Result 208 states and 500 transitions. [2022-03-15 20:32:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 20:32:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 20:32:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:15,823 INFO L225 Difference]: With dead ends: 208 [2022-03-15 20:32:15,823 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 20:32:15,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1512, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 20:32:15,824 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:15,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 20:32:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-03-15 20:32:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.7254901960784315) internal successors, (417), 153 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 417 transitions. [2022-03-15 20:32:15,830 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 417 transitions. Word has length 13 [2022-03-15 20:32:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 417 transitions. [2022-03-15 20:32:15,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 417 transitions. [2022-03-15 20:32:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 20:32:15,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:15,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:15,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:16,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 20:32:16,047 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1484654242, now seen corresponding path program 8 times [2022-03-15 20:32:16,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:16,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586343802] [2022-03-15 20:32:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:16,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:16,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:16,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586343802] [2022-03-15 20:32:16,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586343802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:16,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715319205] [2022-03-15 20:32:16,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:32:16,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:16,096 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) [2022-03-15 20:32:16,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 20:32:16,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:32:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 20:32:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:16,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:16,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715319205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:16,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:16,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 20:32:16,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2039260453] [2022-03-15 20:32:16,199 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:16,199 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:16,201 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 62 transitions. [2022-03-15 20:32:16,201 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:16,460 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2840#(= y (+ 2 x)), 2839#(= (+ x 1) y), 2841#(= (+ 3 x) y)] [2022-03-15 20:32:16,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 20:32:16,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 20:32:16,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:32:16,461 INFO L87 Difference]: Start difference. First operand 154 states and 417 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:16,593 INFO L93 Difference]: Finished difference Result 302 states and 719 transitions. [2022-03-15 20:32:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 20:32:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 20:32:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:16,595 INFO L225 Difference]: With dead ends: 302 [2022-03-15 20:32:16,595 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 20:32:16,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 16 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:32:16,596 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:16,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 20:32:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 201. [2022-03-15 20:32:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.775) internal successors, (555), 200 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 555 transitions. [2022-03-15 20:32:16,601 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 555 transitions. Word has length 14 [2022-03-15 20:32:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:16,602 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 555 transitions. [2022-03-15 20:32:16,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 555 transitions. [2022-03-15 20:32:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 20:32:16,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:16,602 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:16,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:16,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:16,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:32:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash 214008001, now seen corresponding path program 9 times [2022-03-15 20:32:16,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:16,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441917379] [2022-03-15 20:32:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:16,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:16,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441917379] [2022-03-15 20:32:16,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441917379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:16,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464861484] [2022-03-15 20:32:16,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:32:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:16,835 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) [2022-03-15 20:32:16,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 20:32:16,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 20:32:16,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 20:32:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 20:32:16,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 20:32:16,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464861484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:16,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 20:32:16,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-03-15 20:32:16,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1199159341] [2022-03-15 20:32:16,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:16,905 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:16,906 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 60 transitions. [2022-03-15 20:32:16,906 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:17,228 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [3600#(and (or (<= n y) (not (< x n))) (or (< y (+ n 1)) (not (< x n)))), 3598#(or (< x (+ n 1)) (not (< y n))), 3597#(or (= (+ 2 y) x) (<= n (+ y 1)) (< (+ 2 y) n)), 3599#(or (<= n (+ y 1)) (< x (+ n 1))), 3602#(and (or (not (< (+ 2 x) n)) (< y (+ n 1))) (or (<= n y) (not (< (+ 2 x) n)))), 3603#(and (or (<= n y) (not (< (+ 3 x) n))) (or (< y (+ n 1)) (not (< (+ 3 x) n)))), 3601#(and (or (not (< (+ x 1) n)) (< y (+ n 1))) (or (<= n y) (not (< (+ x 1) n)))), 3595#(or (< y n) (= (+ (* (- 1) x) y) 0)), 3596#(or (= (+ (* (- 1) x) y 1) 0) (< (+ y 1) n) (not (< y n)))] [2022-03-15 20:32:17,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 20:32:17,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 20:32:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-15 20:32:17,229 INFO L87 Difference]: Start difference. First operand 201 states and 555 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:17,339 INFO L93 Difference]: Finished difference Result 214 states and 593 transitions. [2022-03-15 20:32:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 20:32:17,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 20:32:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:17,340 INFO L225 Difference]: With dead ends: 214 [2022-03-15 20:32:17,340 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 20:32:17,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-15 20:32:17,340 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 20:32:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 20:32:17,341 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) [2022-03-15 20:32:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 20:32:17,341 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-03-15 20:32:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:17,341 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 20:32:17,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 20:32:17,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 20:32:17,343 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 20:32:17,343 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 20:32:17,343 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 20:32:17,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:17,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 20:32:17,551 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1] [2022-03-15 20:32:17,552 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:32:17,552 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:32:17,554 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:32:17 BasicIcfg [2022-03-15 20:32:17,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:32:17,554 INFO L158 Benchmark]: Toolchain (without parser) took 8756.15ms. Allocated memory was 182.5MB in the beginning and 240.1MB in the end (delta: 57.7MB). Free memory was 143.6MB in the beginning and 195.0MB in the end (delta: -51.4MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. [2022-03-15 20:32:17,554 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 182.5MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:32:17,555 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.36ms. Allocated memory is still 182.5MB. Free memory was 143.6MB in the beginning and 142.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 20:32:17,555 INFO L158 Benchmark]: Boogie Preprocessor took 9.81ms. Allocated memory is still 182.5MB. Free memory was 142.1MB in the beginning and 141.2MB in the end (delta: 894.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:32:17,555 INFO L158 Benchmark]: RCFGBuilder took 198.18ms. Allocated memory is still 182.5MB. Free memory was 141.0MB in the beginning and 132.3MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 20:32:17,555 INFO L158 Benchmark]: TraceAbstraction took 8526.24ms. Allocated memory was 182.5MB in the beginning and 240.1MB in the end (delta: 57.7MB). Free memory was 131.9MB in the beginning and 195.0MB in the end (delta: -63.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:32:17,556 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 0.14ms. Allocated memory is still 182.5MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.36ms. Allocated memory is still 182.5MB. Free memory was 143.6MB in the beginning and 142.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.81ms. Allocated memory is still 182.5MB. Free memory was 142.1MB in the beginning and 141.2MB in the end (delta: 894.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 198.18ms. Allocated memory is still 182.5MB. Free memory was 141.0MB in the beginning and 132.3MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 8526.24ms. Allocated memory was 182.5MB in the beginning and 240.1MB in the end (delta: 57.7MB). Free memory was 131.9MB in the beginning and 195.0MB in the end (delta: -63.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 23 PlacesBefore, 18 PlacesAfterwards, 20 TransitionsBefore, 15 TransitionsAfterwards, 56 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 25, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 48, positive: 23, positive conditional: 0, positive unconditional: 23, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 25, unknown conditional: 0, unknown unconditional: 25] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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: 24]: 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, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 8.4s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 389 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 389 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 450 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1929 IncrementalHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 16 mSDtfsCounter, 1929 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 524 GetRequests, 255 SyntacticMatches, 62 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=12, InterpolantAutomatonStates: 182, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 333 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 263 NumberOfCodeBlocks, 260 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 1752 SizeOfPredicates, 9 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 32 InterpolantComputations, 4 PerfectInterpolantSequences, 73/189 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! [2022-03-15 20:32:17,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...