/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:09:28,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:09:28,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:09:28,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:09:28,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:09:28,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:09:28,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:09:28,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 01:09:28,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:09:28,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:09:28,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:09:28,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:09:28,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:09:28,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:09:28,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:09:28,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:09:28,774 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:09:28,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:09:28,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:09:28,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:09:28,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:09:28,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:09:28,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:09:28,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:09:28,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:09:28,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:09:28,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:09:28,989 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:09:28,990 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:09:28,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2022-02-11 01:09:28,991 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2022-02-11 01:09:29,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:09:29,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:09:29,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:09:29,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:09:29,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:09:29,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,033 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:09:29,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:09:29,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:09:29,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:09:29,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:09:29,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:09:29,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:09:29,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:09:29,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:09:29,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/1) ... [2022-02-11 01:09:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:09:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:29,074 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) [2022-02-11 01:09:29,085 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 [2022-02-11 01:09:29,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:09:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:09:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:09:29,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:09:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:09:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:09:29,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:09:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:09:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:09:29,114 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:09:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:09:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:09:29,114 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:09:29,153 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:09:29,155 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:09:29,271 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:09:29,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:09:29,276 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:09:29,277 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:09:29 BoogieIcfgContainer [2022-02-11 01:09:29,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:09:29,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:09:29,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:09:29,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:09:29,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:09:29" (1/2) ... [2022-02-11 01:09:29,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ad48a3 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:09:29, skipping insertion in model container [2022-02-11 01:09:29,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:09:29" (2/2) ... [2022-02-11 01:09:29,287 INFO L112 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2022-02-11 01:09:29,293 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:09:29,293 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:09:29,294 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:09:29,294 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:09:29,344 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:09:29,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:09:29,401 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 01:09:29,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:09:29,410 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-02-11 01:09:29,457 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:09:29,472 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:29,473 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:29,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1704584700, now seen corresponding path program 1 times [2022-02-11 01:09:29,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:29,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110304748] [2022-02-11 01:09:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:29,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:29,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110304748] [2022-02-11 01:09:29,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110304748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:09:29,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:09:29,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:09:29,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328997893] [2022-02-11 01:09:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:09:29,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:09:29,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:09:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:09:29,641 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:29,698 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-02-11 01:09:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:09:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 01:09:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:29,725 INFO L225 Difference]: With dead ends: 298 [2022-02-11 01:09:29,725 INFO L226 Difference]: Without dead ends: 283 [2022-02-11 01:09:29,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:09:29,729 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:29,729 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:09:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-11 01:09:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-02-11 01:09:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-02-11 01:09:29,813 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-02-11 01:09:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:29,813 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-02-11 01:09:29,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-02-11 01:09:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:09:29,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:29,816 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:29,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:09:29,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash -665793199, now seen corresponding path program 1 times [2022-02-11 01:09:29,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:29,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939570474] [2022-02-11 01:09:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:29,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:29,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:29,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939570474] [2022-02-11 01:09:29,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939570474] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:09:29,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:09:29,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:09:29,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646155387] [2022-02-11 01:09:29,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:09:29,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:09:29,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:09:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:09:29,870 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:29,913 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2022-02-11 01:09:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:09:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:09:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:29,916 INFO L225 Difference]: With dead ends: 249 [2022-02-11 01:09:29,916 INFO L226 Difference]: Without dead ends: 249 [2022-02-11 01:09:29,916 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:09:29,917 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:29,917 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:09:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-11 01:09:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2022-02-11 01:09:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2022-02-11 01:09:29,930 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2022-02-11 01:09:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:29,930 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2022-02-11 01:09:29,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2022-02-11 01:09:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:09:29,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:29,932 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:29,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:09:29,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash -970035705, now seen corresponding path program 1 times [2022-02-11 01:09:29,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:29,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507123362] [2022-02-11 01:09:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:29,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:29,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507123362] [2022-02-11 01:09:29,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507123362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:09:29,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:09:29,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:09:29,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811648318] [2022-02-11 01:09:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:09:29,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:09:29,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:09:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:09:29,978 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:30,030 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2022-02-11 01:09:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:09:30,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:09:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:30,033 INFO L225 Difference]: With dead ends: 332 [2022-02-11 01:09:30,033 INFO L226 Difference]: Without dead ends: 332 [2022-02-11 01:09:30,033 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:09:30,034 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:30,034 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:09:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-11 01:09:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2022-02-11 01:09:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2022-02-11 01:09:30,047 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2022-02-11 01:09:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2022-02-11 01:09:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2022-02-11 01:09:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:30,049 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:30,050 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:30,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:09:30,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:30,050 INFO L85 PathProgramCache]: Analyzing trace with hash 954256018, now seen corresponding path program 1 times [2022-02-11 01:09:30,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:30,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720697299] [2022-02-11 01:09:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:30,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:30,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:30,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720697299] [2022-02-11 01:09:30,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720697299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:30,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55847681] [2022-02-11 01:09:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:30,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:30,437 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) [2022-02-11 01:09:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:09:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:09:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:30,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:30,835 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-11 01:09:30,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-02-11 01:09:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:30,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:31,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:31,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:31,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:31,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:31,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:31,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:31,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:31,064 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:31,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:31,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55847681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:31,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:31,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 01:09:31,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511980646] [2022-02-11 01:09:31,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:31,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:09:31,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:09:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:09:31,164 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:31,575 INFO L93 Difference]: Finished difference Result 535 states and 1542 transitions. [2022-02-11 01:09:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 01:09:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:31,579 INFO L225 Difference]: With dead ends: 535 [2022-02-11 01:09:31,579 INFO L226 Difference]: Without dead ends: 520 [2022-02-11 01:09:31,579 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:09:31,580 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 234 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:31,580 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 112 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:09:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-11 01:09:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2022-02-11 01:09:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2022-02-11 01:09:31,594 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2022-02-11 01:09:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:31,594 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2022-02-11 01:09:31,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2022-02-11 01:09:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:31,595 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:31,596 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:31,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-11 01:09:31,811 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 [2022-02-11 01:09:31,811 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 372317296, now seen corresponding path program 2 times [2022-02-11 01:09:31,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:31,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364734782] [2022-02-11 01:09:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:32,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:32,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364734782] [2022-02-11 01:09:32,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364734782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:32,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299024167] [2022-02-11 01:09:32,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:32,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:32,084 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) [2022-02-11 01:09:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:09:32,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:09:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:32,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-02-11 01:09:32,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 61 [2022-02-11 01:09:32,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:09:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:32,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:32,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:32,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:32,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:32,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:32,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:32,701 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:32,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:32,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299024167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:32,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:32,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-11 01:09:32,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923889940] [2022-02-11 01:09:32,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:32,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:09:32,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:09:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:09:32,790 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:34,331 INFO L93 Difference]: Finished difference Result 1195 states and 3469 transitions. [2022-02-11 01:09:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:09:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:34,337 INFO L225 Difference]: With dead ends: 1195 [2022-02-11 01:09:34,337 INFO L226 Difference]: Without dead ends: 1165 [2022-02-11 01:09:34,338 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=1978, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:09:34,338 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 464 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:34,339 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 182 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-02-11 01:09:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 448. [2022-02-11 01:09:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.9731543624161074) internal successors, (1329), 447 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1329 transitions. [2022-02-11 01:09:34,354 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1329 transitions. Word has length 24 [2022-02-11 01:09:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1329 transitions. [2022-02-11 01:09:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1329 transitions. [2022-02-11 01:09:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:34,356 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:34,356 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:34,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-11 01:09:34,580 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 [2022-02-11 01:09:34,580 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -669864304, now seen corresponding path program 3 times [2022-02-11 01:09:34,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:34,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443275202] [2022-02-11 01:09:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:34,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:34,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443275202] [2022-02-11 01:09:34,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443275202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:34,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840704758] [2022-02-11 01:09:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:34,764 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) [2022-02-11 01:09:34,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:09:34,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:09:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:09:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:34,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-02-11 01:09:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:34,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:35,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:35,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:35,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:35,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:35,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:35,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:35,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:35,130 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:35,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:35,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840704758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:35,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:35,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-11 01:09:35,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058666725] [2022-02-11 01:09:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:35,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:09:35,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:09:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:09:35,232 INFO L87 Difference]: Start difference. First operand 448 states and 1329 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:35,581 INFO L93 Difference]: Finished difference Result 682 states and 1977 transitions. [2022-02-11 01:09:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 01:09:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:35,586 INFO L225 Difference]: With dead ends: 682 [2022-02-11 01:09:35,586 INFO L226 Difference]: Without dead ends: 667 [2022-02-11 01:09:35,586 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:09:35,587 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:35,587 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 119 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:09:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-11 01:09:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 464. [2022-02-11 01:09:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.9568034557235423) internal successors, (1369), 463 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1369 transitions. [2022-02-11 01:09:35,602 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1369 transitions. Word has length 24 [2022-02-11 01:09:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:35,603 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1369 transitions. [2022-02-11 01:09:35,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1369 transitions. [2022-02-11 01:09:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:35,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:35,604 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:35,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:35,817 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 [2022-02-11 01:09:35,818 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1129139024, now seen corresponding path program 4 times [2022-02-11 01:09:35,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:35,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575759070] [2022-02-11 01:09:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:36,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:36,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575759070] [2022-02-11 01:09:36,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575759070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:36,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562890733] [2022-02-11 01:09:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:36,010 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) [2022-02-11 01:09:36,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:09:36,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:09:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:36,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-11 01:09:36,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 01:09:36,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:09:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:36,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:36,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:36,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:36,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:36,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:36,501 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:36,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:36,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562890733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:36,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:36,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-11 01:09:36,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100910162] [2022-02-11 01:09:36,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:36,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:09:36,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:09:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:09:36,610 INFO L87 Difference]: Start difference. First operand 464 states and 1369 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:36,889 INFO L93 Difference]: Finished difference Result 763 states and 2257 transitions. [2022-02-11 01:09:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:09:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:36,893 INFO L225 Difference]: With dead ends: 763 [2022-02-11 01:09:36,894 INFO L226 Difference]: Without dead ends: 748 [2022-02-11 01:09:36,894 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:09:36,895 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:36,895 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 122 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-02-11 01:09:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-11 01:09:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 479. [2022-02-11 01:09:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.98326359832636) internal successors, (1426), 478 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1426 transitions. [2022-02-11 01:09:36,909 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1426 transitions. Word has length 24 [2022-02-11 01:09:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1426 transitions. [2022-02-11 01:09:36,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1426 transitions. [2022-02-11 01:09:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:36,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:36,911 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:36,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:37,128 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 [2022-02-11 01:09:37,129 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1804153484, now seen corresponding path program 5 times [2022-02-11 01:09:37,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:37,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923131939] [2022-02-11 01:09:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:37,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:37,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923131939] [2022-02-11 01:09:37,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923131939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:37,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273545148] [2022-02-11 01:09:37,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:37,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:37,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:37,333 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) [2022-02-11 01:09:37,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:09:37,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:09:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:09:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:37,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-11 01:09:37,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-11 01:09:37,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:37,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:37,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:37,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:37,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:37,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:38,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:38,039 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:38,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:38,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273545148] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:38,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:38,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2022-02-11 01:09:38,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049616717] [2022-02-11 01:09:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:38,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:09:38,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:09:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:09:38,138 INFO L87 Difference]: Start difference. First operand 479 states and 1426 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:42,359 INFO L93 Difference]: Finished difference Result 1711 states and 4956 transitions. [2022-02-11 01:09:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 01:09:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:42,366 INFO L225 Difference]: With dead ends: 1711 [2022-02-11 01:09:42,366 INFO L226 Difference]: Without dead ends: 1681 [2022-02-11 01:09:42,369 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2524, Invalid=11518, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 01:09:42,370 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 374 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:42,370 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 423 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1512 Invalid, 0 Unknown, 273 Unchecked, 0.9s Time] [2022-02-11 01:09:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-02-11 01:09:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 516. [2022-02-11 01:09:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.0349514563106794) internal successors, (1563), 515 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1563 transitions. [2022-02-11 01:09:42,388 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1563 transitions. Word has length 24 [2022-02-11 01:09:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:42,388 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1563 transitions. [2022-02-11 01:09:42,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1563 transitions. [2022-02-11 01:09:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:09:42,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:42,391 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:42,607 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 [2022-02-11 01:09:42,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash 795589012, now seen corresponding path program 6 times [2022-02-11 01:09:42,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:42,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797455537] [2022-02-11 01:09:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:42,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:42,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797455537] [2022-02-11 01:09:42,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797455537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:42,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793524414] [2022-02-11 01:09:42,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:42,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:42,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:42,794 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) [2022-02-11 01:09:42,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:09:42,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:09:42,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:09:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:42,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:42,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-02-11 01:09:42,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:42,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-02-11 01:09:42,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:42,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:09:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:43,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:43,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:09:43,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:43,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:09:43,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:43,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:09:43,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:09:43,246 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:09:43,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:09:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:43,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793524414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:43,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:43,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-02-11 01:09:43,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726179896] [2022-02-11 01:09:43,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:43,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 01:09:43,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 01:09:43,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-11 01:09:43,332 INFO L87 Difference]: Start difference. First operand 516 states and 1563 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:44,638 INFO L93 Difference]: Finished difference Result 1105 states and 3275 transitions. [2022-02-11 01:09:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:09:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:09:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:44,642 INFO L225 Difference]: With dead ends: 1105 [2022-02-11 01:09:44,642 INFO L226 Difference]: Without dead ends: 1090 [2022-02-11 01:09:44,643 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:09:44,645 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 267 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:44,645 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 173 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-02-11 01:09:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 498. [2022-02-11 01:09:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.006036217303823) internal successors, (1494), 497 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1494 transitions. [2022-02-11 01:09:44,660 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1494 transitions. Word has length 24 [2022-02-11 01:09:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:44,660 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1494 transitions. [2022-02-11 01:09:44,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1494 transitions. [2022-02-11 01:09:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:44,661 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:44,661 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:44,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:44,878 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 [2022-02-11 01:09:44,878 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2028428791, now seen corresponding path program 7 times [2022-02-11 01:09:44,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:44,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240338373] [2022-02-11 01:09:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:44,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:44,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240338373] [2022-02-11 01:09:44,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240338373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:44,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608982505] [2022-02-11 01:09:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:44,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:44,935 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) [2022-02-11 01:09:44,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:09:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:45,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:45,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608982505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:45,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:45,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:09:45,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970351251] [2022-02-11 01:09:45,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:09:45,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:09:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:09:45,151 INFO L87 Difference]: Start difference. First operand 498 states and 1494 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:45,828 INFO L93 Difference]: Finished difference Result 2271 states and 6608 transitions. [2022-02-11 01:09:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:09:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:45,836 INFO L225 Difference]: With dead ends: 2271 [2022-02-11 01:09:45,836 INFO L226 Difference]: Without dead ends: 2271 [2022-02-11 01:09:45,837 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:09:45,838 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 422 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:45,838 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 196 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-02-11 01:09:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 643. [2022-02-11 01:09:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.188473520249221) internal successors, (2047), 642 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2047 transitions. [2022-02-11 01:09:45,856 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2047 transitions. Word has length 27 [2022-02-11 01:09:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:45,856 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2047 transitions. [2022-02-11 01:09:45,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2047 transitions. [2022-02-11 01:09:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:45,858 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:45,858 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:45,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-11 01:09:46,072 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 [2022-02-11 01:09:46,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1539908103, now seen corresponding path program 8 times [2022-02-11 01:09:46,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:46,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069455740] [2022-02-11 01:09:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:46,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:46,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:46,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069455740] [2022-02-11 01:09:46,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069455740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:46,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848307751] [2022-02-11 01:09:46,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:46,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:46,123 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) [2022-02-11 01:09:46,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:09:46,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:46,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:46,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:46,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848307751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:46,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:46,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:09:46,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939527438] [2022-02-11 01:09:46,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:46,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:09:46,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:09:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:09:46,353 INFO L87 Difference]: Start difference. First operand 643 states and 2047 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:48,308 INFO L93 Difference]: Finished difference Result 3591 states and 10373 transitions. [2022-02-11 01:09:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 01:09:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:48,323 INFO L225 Difference]: With dead ends: 3591 [2022-02-11 01:09:48,323 INFO L226 Difference]: Without dead ends: 3591 [2022-02-11 01:09:48,328 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:09:48,328 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:48,328 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 338 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:09:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2022-02-11 01:09:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 647. [2022-02-11 01:09:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.1996904024767803) internal successors, (2067), 646 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2067 transitions. [2022-02-11 01:09:48,382 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2067 transitions. Word has length 27 [2022-02-11 01:09:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:48,382 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2067 transitions. [2022-02-11 01:09:48,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2067 transitions. [2022-02-11 01:09:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:48,383 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:48,383 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:48,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-11 01:09:48,599 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 [2022-02-11 01:09:48,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1733808771, now seen corresponding path program 9 times [2022-02-11 01:09:48,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:48,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399923992] [2022-02-11 01:09:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:48,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:48,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:48,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399923992] [2022-02-11 01:09:48,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399923992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:48,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610299906] [2022-02-11 01:09:48,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:48,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:48,648 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) [2022-02-11 01:09:48,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:09:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:09:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:48,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610299906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:48,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:48,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:09:48,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976209083] [2022-02-11 01:09:48,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:48,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:09:48,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:09:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:09:48,874 INFO L87 Difference]: Start difference. First operand 647 states and 2067 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:49,612 INFO L93 Difference]: Finished difference Result 2922 states and 8417 transitions. [2022-02-11 01:09:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:09:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:49,625 INFO L225 Difference]: With dead ends: 2922 [2022-02-11 01:09:49,625 INFO L226 Difference]: Without dead ends: 2922 [2022-02-11 01:09:49,626 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 01:09:49,627 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 471 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:49,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 248 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-02-11 01:09:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 637. [2022-02-11 01:09:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.1871069182389937) internal successors, (2027), 636 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2027 transitions. [2022-02-11 01:09:49,675 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2027 transitions. Word has length 27 [2022-02-11 01:09:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:49,675 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2027 transitions. [2022-02-11 01:09:49,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2027 transitions. [2022-02-11 01:09:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:49,677 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:49,677 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:49,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:49,893 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 [2022-02-11 01:09:49,893 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 373023270, now seen corresponding path program 1 times [2022-02-11 01:09:49,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:49,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463786814] [2022-02-11 01:09:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:49,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:49,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463786814] [2022-02-11 01:09:49,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463786814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:49,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596680874] [2022-02-11 01:09:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:49,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:49,936 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) [2022-02-11 01:09:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:09:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:09:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:50,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:50,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596680874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:50,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:50,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:09:50,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324767277] [2022-02-11 01:09:50,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:50,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:09:50,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:09:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:09:50,084 INFO L87 Difference]: Start difference. First operand 637 states and 2027 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:50,169 INFO L93 Difference]: Finished difference Result 1395 states and 4216 transitions. [2022-02-11 01:09:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:09:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:50,185 INFO L225 Difference]: With dead ends: 1395 [2022-02-11 01:09:50,185 INFO L226 Difference]: Without dead ends: 1377 [2022-02-11 01:09:50,185 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:09:50,186 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 305 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:50,186 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 57 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:09:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-02-11 01:09:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 917. [2022-02-11 01:09:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.2587336244541483) internal successors, (2985), 916 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2985 transitions. [2022-02-11 01:09:50,202 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2985 transitions. Word has length 27 [2022-02-11 01:09:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2985 transitions. [2022-02-11 01:09:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2985 transitions. [2022-02-11 01:09:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:50,204 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:50,204 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:50,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:50,420 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 [2022-02-11 01:09:50,420 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1292974513, now seen corresponding path program 10 times [2022-02-11 01:09:50,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:50,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3759441] [2022-02-11 01:09:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:50,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:50,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:50,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3759441] [2022-02-11 01:09:50,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3759441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:50,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713969822] [2022-02-11 01:09:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:50,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:50,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:50,460 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:50,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:09:50,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:50,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:50,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713969822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:50,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:50,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:09:50,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081462581] [2022-02-11 01:09:50,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:09:50,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:09:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:09:50,631 INFO L87 Difference]: Start difference. First operand 917 states and 2985 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:50,946 INFO L93 Difference]: Finished difference Result 2362 states and 7302 transitions. [2022-02-11 01:09:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:09:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:50,952 INFO L225 Difference]: With dead ends: 2362 [2022-02-11 01:09:50,952 INFO L226 Difference]: Without dead ends: 2295 [2022-02-11 01:09:50,952 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:09:50,953 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:50,953 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 199 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:09:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-02-11 01:09:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1429. [2022-02-11 01:09:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.330532212885154) internal successors, (4756), 1428 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4756 transitions. [2022-02-11 01:09:50,989 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4756 transitions. Word has length 27 [2022-02-11 01:09:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:50,989 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4756 transitions. [2022-02-11 01:09:50,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4756 transitions. [2022-02-11 01:09:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:50,993 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:50,993 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:51,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:51,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 01:09:51,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash -502740502, now seen corresponding path program 2 times [2022-02-11 01:09:51,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:51,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429601757] [2022-02-11 01:09:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:51,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:51,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429601757] [2022-02-11 01:09:51,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429601757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:51,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388366054] [2022-02-11 01:09:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:51,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:51,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:51,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:09:51,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:09:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:51,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:09:51,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388366054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:51,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:51,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:09:51,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404289387] [2022-02-11 01:09:51,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:51,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:09:51,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:09:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:09:51,437 INFO L87 Difference]: Start difference. First operand 1429 states and 4756 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:51,577 INFO L93 Difference]: Finished difference Result 2511 states and 7693 transitions. [2022-02-11 01:09:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:09:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:51,584 INFO L225 Difference]: With dead ends: 2511 [2022-02-11 01:09:51,584 INFO L226 Difference]: Without dead ends: 2511 [2022-02-11 01:09:51,584 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:09:51,585 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 270 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:51,585 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 90 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:09:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-02-11 01:09:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1499. [2022-02-11 01:09:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.2963951935914553) internal successors, (4938), 1498 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4938 transitions. [2022-02-11 01:09:51,624 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4938 transitions. Word has length 27 [2022-02-11 01:09:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:51,624 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 4938 transitions. [2022-02-11 01:09:51,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4938 transitions. [2022-02-11 01:09:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:51,628 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:51,628 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:51,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:51,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-11 01:09:51,849 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash -340431285, now seen corresponding path program 11 times [2022-02-11 01:09:51,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:51,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590022526] [2022-02-11 01:09:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:51,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:51,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590022526] [2022-02-11 01:09:51,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590022526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:51,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869695960] [2022-02-11 01:09:51,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:51,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:51,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:51,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:09:51,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:09:51,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:51,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:52,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869695960] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:52,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:52,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:09:52,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724203647] [2022-02-11 01:09:52,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:52,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:09:52,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:09:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:09:52,066 INFO L87 Difference]: Start difference. First operand 1499 states and 4938 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:52,631 INFO L93 Difference]: Finished difference Result 4914 states and 14852 transitions. [2022-02-11 01:09:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:09:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:52,643 INFO L225 Difference]: With dead ends: 4914 [2022-02-11 01:09:52,644 INFO L226 Difference]: Without dead ends: 4914 [2022-02-11 01:09:52,645 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:09:52,647 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 293 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:52,647 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 172 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-02-11 01:09:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 1527. [2022-02-11 01:09:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.290956749672346) internal successors, (5022), 1526 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5022 transitions. [2022-02-11 01:09:52,733 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5022 transitions. Word has length 27 [2022-02-11 01:09:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:52,733 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5022 transitions. [2022-02-11 01:09:52,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5022 transitions. [2022-02-11 01:09:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:52,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:52,737 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:52,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:52,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-11 01:09:52,942 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -428155657, now seen corresponding path program 12 times [2022-02-11 01:09:52,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:52,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113700846] [2022-02-11 01:09:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:52,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:52,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:52,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113700846] [2022-02-11 01:09:52,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113700846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:52,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130033698] [2022-02-11 01:09:52,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:52,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:52,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:53,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:53,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:09:53,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:09:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:53,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:53,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:53,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130033698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:53,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:53,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:09:53,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815841492] [2022-02-11 01:09:53,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:53,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:09:53,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:09:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:09:53,149 INFO L87 Difference]: Start difference. First operand 1527 states and 5022 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:53,931 INFO L93 Difference]: Finished difference Result 4943 states and 15025 transitions. [2022-02-11 01:09:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:09:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:53,942 INFO L225 Difference]: With dead ends: 4943 [2022-02-11 01:09:53,943 INFO L226 Difference]: Without dead ends: 4943 [2022-02-11 01:09:53,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:09:53,945 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 327 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:53,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 180 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-02-11 01:09:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 1683. [2022-02-11 01:09:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.256837098692033) internal successors, (5478), 1682 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5478 transitions. [2022-02-11 01:09:53,996 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5478 transitions. Word has length 27 [2022-02-11 01:09:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:53,996 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5478 transitions. [2022-02-11 01:09:53,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5478 transitions. [2022-02-11 01:09:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:53,999 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:53,999 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:54,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:54,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:54,215 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 193811757, now seen corresponding path program 13 times [2022-02-11 01:09:54,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:54,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207951965] [2022-02-11 01:09:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:54,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:54,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:54,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207951965] [2022-02-11 01:09:54,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207951965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:54,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923918844] [2022-02-11 01:09:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:54,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:54,272 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:54,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:09:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:54,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:54,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923918844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:54,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:54,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-11 01:09:54,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377423693] [2022-02-11 01:09:54,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:54,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:09:54,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:09:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:09:54,475 INFO L87 Difference]: Start difference. First operand 1683 states and 5478 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:54,890 INFO L93 Difference]: Finished difference Result 3283 states and 10240 transitions. [2022-02-11 01:09:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:09:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:54,897 INFO L225 Difference]: With dead ends: 3283 [2022-02-11 01:09:54,897 INFO L226 Difference]: Without dead ends: 3283 [2022-02-11 01:09:54,897 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:09:54,897 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:54,897 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 208 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:09:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-02-11 01:09:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2080. [2022-02-11 01:09:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.3044733044733046) internal successors, (6870), 2079 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 6870 transitions. [2022-02-11 01:09:54,994 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 6870 transitions. Word has length 27 [2022-02-11 01:09:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:54,994 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 6870 transitions. [2022-02-11 01:09:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 6870 transitions. [2022-02-11 01:09:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:55,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:55,011 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:55,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:55,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 01:09:55,228 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1978086597, now seen corresponding path program 14 times [2022-02-11 01:09:55,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:55,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818625231] [2022-02-11 01:09:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:55,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:55,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818625231] [2022-02-11 01:09:55,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818625231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:55,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076412609] [2022-02-11 01:09:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:55,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:55,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:09:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:55,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:55,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076412609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:55,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:55,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:09:55,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263706975] [2022-02-11 01:09:55,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:55,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:09:55,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:09:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:09:55,581 INFO L87 Difference]: Start difference. First operand 2080 states and 6870 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:56,261 INFO L93 Difference]: Finished difference Result 5570 states and 17389 transitions. [2022-02-11 01:09:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:09:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:56,272 INFO L225 Difference]: With dead ends: 5570 [2022-02-11 01:09:56,272 INFO L226 Difference]: Without dead ends: 5566 [2022-02-11 01:09:56,273 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:09:56,274 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:56,275 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 154 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-02-11 01:09:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 2092. [2022-02-11 01:09:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.29507412721186) internal successors, (6890), 2091 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 6890 transitions. [2022-02-11 01:09:56,386 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 6890 transitions. Word has length 27 [2022-02-11 01:09:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:56,387 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 6890 transitions. [2022-02-11 01:09:56,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 6890 transitions. [2022-02-11 01:09:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:56,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:56,391 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:56,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-11 01:09:56,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:56,605 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 721611839, now seen corresponding path program 15 times [2022-02-11 01:09:56,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:56,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025891812] [2022-02-11 01:09:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:56,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:56,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:56,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025891812] [2022-02-11 01:09:56,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025891812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:56,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271699278] [2022-02-11 01:09:56,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:56,649 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:56,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:09:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:09:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:56,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:56,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271699278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:56,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:56,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:09:56,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484279553] [2022-02-11 01:09:56,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:56,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:09:56,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:09:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:09:56,905 INFO L87 Difference]: Start difference. First operand 2092 states and 6890 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:57,999 INFO L93 Difference]: Finished difference Result 6718 states and 20043 transitions. [2022-02-11 01:09:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:09:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:58,030 INFO L225 Difference]: With dead ends: 6718 [2022-02-11 01:09:58,030 INFO L226 Difference]: Without dead ends: 6718 [2022-02-11 01:09:58,031 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:09:58,040 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 463 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:58,041 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 284 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2022-02-11 01:09:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 2263. [2022-02-11 01:09:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3320070733863836) internal successors, (7537), 2262 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7537 transitions. [2022-02-11 01:09:58,139 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7537 transitions. Word has length 27 [2022-02-11 01:09:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:58,139 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7537 transitions. [2022-02-11 01:09:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7537 transitions. [2022-02-11 01:09:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:58,143 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:58,143 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:58,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:58,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:58,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:09:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1790705987, now seen corresponding path program 16 times [2022-02-11 01:09:58,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:58,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117775284] [2022-02-11 01:09:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:58,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:58,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117775284] [2022-02-11 01:09:58,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117775284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:58,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747481737] [2022-02-11 01:09:58,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:58,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:58,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:58,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:09:58,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:09:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:58,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:58,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747481737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:58,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:58,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:09:58,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812070388] [2022-02-11 01:09:58,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:09:58,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:09:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:09:58,648 INFO L87 Difference]: Start difference. First operand 2263 states and 7537 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:59,844 INFO L93 Difference]: Finished difference Result 6558 states and 19960 transitions. [2022-02-11 01:09:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:09:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:59,857 INFO L225 Difference]: With dead ends: 6558 [2022-02-11 01:09:59,857 INFO L226 Difference]: Without dead ends: 6554 [2022-02-11 01:09:59,859 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 01:09:59,867 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 545 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:59,868 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 258 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2022-02-11 01:09:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 2263. [2022-02-11 01:09:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3311229000884173) internal successors, (7535), 2262 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7535 transitions. [2022-02-11 01:09:59,925 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7535 transitions. Word has length 27 [2022-02-11 01:09:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:59,926 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7535 transitions. [2022-02-11 01:09:59,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7535 transitions. [2022-02-11 01:09:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:59,929 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:59,929 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:59,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-11 01:10:00,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:00,144 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1441844744, now seen corresponding path program 3 times [2022-02-11 01:10:00,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:00,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052136063] [2022-02-11 01:10:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:00,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:00,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052136063] [2022-02-11 01:10:00,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052136063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:00,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936628817] [2022-02-11 01:10:00,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:00,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:00,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:00,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:10:00,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:10:00,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:10:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:00,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936628817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:00,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:00,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-11 01:10:00,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693510224] [2022-02-11 01:10:00,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:00,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:10:00,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:10:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:10:00,317 INFO L87 Difference]: Start difference. First operand 2263 states and 7535 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:00,441 INFO L93 Difference]: Finished difference Result 2910 states and 9299 transitions. [2022-02-11 01:10:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:10:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:00,446 INFO L225 Difference]: With dead ends: 2910 [2022-02-11 01:10:00,446 INFO L226 Difference]: Without dead ends: 2910 [2022-02-11 01:10:00,447 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:10:00,447 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:00,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:10:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-02-11 01:10:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2121. [2022-02-11 01:10:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3141509433962266) internal successors, (7026), 2120 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7026 transitions. [2022-02-11 01:10:00,479 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7026 transitions. Word has length 27 [2022-02-11 01:10:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7026 transitions. [2022-02-11 01:10:00,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7026 transitions. [2022-02-11 01:10:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:00,482 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:00,482 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:00,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-11 01:10:00,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:00,697 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -746228089, now seen corresponding path program 17 times [2022-02-11 01:10:00,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:00,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688431994] [2022-02-11 01:10:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:00,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:00,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688431994] [2022-02-11 01:10:00,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688431994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:00,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250247921] [2022-02-11 01:10:00,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:00,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:00,732 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:00,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:10:00,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:10:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:00,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:00,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250247921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:00,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:00,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:10:00,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805291775] [2022-02-11 01:10:00,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:00,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:10:00,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:10:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:10:00,898 INFO L87 Difference]: Start difference. First operand 2121 states and 7026 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:01,234 INFO L93 Difference]: Finished difference Result 4738 states and 14874 transitions. [2022-02-11 01:10:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:10:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:01,246 INFO L225 Difference]: With dead ends: 4738 [2022-02-11 01:10:01,246 INFO L226 Difference]: Without dead ends: 4738 [2022-02-11 01:10:01,247 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:10:01,247 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 201 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:01,248 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 142 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-02-11 01:10:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2263. [2022-02-11 01:10:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2904509283819627) internal successors, (7443), 2262 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7443 transitions. [2022-02-11 01:10:01,334 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7443 transitions. Word has length 27 [2022-02-11 01:10:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:01,334 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7443 transitions. [2022-02-11 01:10:01,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7443 transitions. [2022-02-11 01:10:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:01,338 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:01,338 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:01,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-11 01:10:01,542 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -93700181, now seen corresponding path program 18 times [2022-02-11 01:10:01,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:01,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237554834] [2022-02-11 01:10:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:01,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:01,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237554834] [2022-02-11 01:10:01,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237554834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:01,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747143780] [2022-02-11 01:10:01,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:01,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:01,575 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:01,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:10:01,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:10:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:01,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:01,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747143780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:01,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:01,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:10:01,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594623598] [2022-02-11 01:10:01,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:01,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:10:01,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:10:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:10:01,769 INFO L87 Difference]: Start difference. First operand 2263 states and 7443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:02,195 INFO L93 Difference]: Finished difference Result 5029 states and 15712 transitions. [2022-02-11 01:10:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:10:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:02,204 INFO L225 Difference]: With dead ends: 5029 [2022-02-11 01:10:02,204 INFO L226 Difference]: Without dead ends: 5029 [2022-02-11 01:10:02,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:10:02,205 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 227 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:02,205 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 128 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-02-11 01:10:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2429. [2022-02-11 01:10:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 3.2701812191103787) internal successors, (7940), 2428 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7940 transitions. [2022-02-11 01:10:02,291 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7940 transitions. Word has length 27 [2022-02-11 01:10:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:02,291 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 7940 transitions. [2022-02-11 01:10:02,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7940 transitions. [2022-02-11 01:10:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:02,294 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:02,295 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:02,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-11 01:10:02,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-11 01:10:02,496 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -421030457, now seen corresponding path program 19 times [2022-02-11 01:10:02,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:02,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534548173] [2022-02-11 01:10:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:02,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:02,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534548173] [2022-02-11 01:10:02,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534548173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:02,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273858588] [2022-02-11 01:10:02,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:02,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:02,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:10:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:02,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273858588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:02,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:02,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-11 01:10:02,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612872247] [2022-02-11 01:10:02,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:02,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:10:02,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:10:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:10:02,762 INFO L87 Difference]: Start difference. First operand 2429 states and 7940 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:03,027 INFO L93 Difference]: Finished difference Result 3230 states and 10321 transitions. [2022-02-11 01:10:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:10:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:03,034 INFO L225 Difference]: With dead ends: 3230 [2022-02-11 01:10:03,034 INFO L226 Difference]: Without dead ends: 3220 [2022-02-11 01:10:03,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:03,035 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:03,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 184 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:10:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-02-11 01:10:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2644. [2022-02-11 01:10:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.3019296254256525) internal successors, (8727), 2643 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8727 transitions. [2022-02-11 01:10:03,077 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8727 transitions. Word has length 27 [2022-02-11 01:10:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:03,077 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8727 transitions. [2022-02-11 01:10:03,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8727 transitions. [2022-02-11 01:10:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:03,081 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:03,081 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:03,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:03,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:03,297 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1643631121, now seen corresponding path program 20 times [2022-02-11 01:10:03,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:03,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181670265] [2022-02-11 01:10:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:03,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:03,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181670265] [2022-02-11 01:10:03,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181670265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:03,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201763473] [2022-02-11 01:10:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:03,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:03,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:03,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:10:03,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:03,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:03,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201763473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:03,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:03,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:10:03,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806522157] [2022-02-11 01:10:03,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:03,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:10:03,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:10:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:10:03,498 INFO L87 Difference]: Start difference. First operand 2644 states and 8727 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:03,763 INFO L93 Difference]: Finished difference Result 5352 states and 17038 transitions. [2022-02-11 01:10:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:10:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:03,774 INFO L225 Difference]: With dead ends: 5352 [2022-02-11 01:10:03,774 INFO L226 Difference]: Without dead ends: 5348 [2022-02-11 01:10:03,774 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:03,775 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:03,775 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 103 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:10:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-02-11 01:10:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2644. [2022-02-11 01:10:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.2996594778660615) internal successors, (8721), 2643 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8721 transitions. [2022-02-11 01:10:03,856 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8721 transitions. Word has length 27 [2022-02-11 01:10:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:03,856 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8721 transitions. [2022-02-11 01:10:03,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8721 transitions. [2022-02-11 01:10:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:03,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:03,860 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:03,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:04,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:04,077 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash -151626389, now seen corresponding path program 21 times [2022-02-11 01:10:04,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:04,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029093175] [2022-02-11 01:10:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:04,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:04,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029093175] [2022-02-11 01:10:04,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029093175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:04,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403806062] [2022-02-11 01:10:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:04,123 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:04,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:10:04,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:10:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:04,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403806062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:04,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:04,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:10:04,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078452113] [2022-02-11 01:10:04,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:04,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:10:04,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:10:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:10:04,278 INFO L87 Difference]: Start difference. First operand 2644 states and 8721 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:04,652 INFO L93 Difference]: Finished difference Result 5332 states and 16988 transitions. [2022-02-11 01:10:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:10:04,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:04,662 INFO L225 Difference]: With dead ends: 5332 [2022-02-11 01:10:04,662 INFO L226 Difference]: Without dead ends: 5316 [2022-02-11 01:10:04,662 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:10:04,663 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:04,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 114 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-02-11 01:10:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2652. [2022-02-11 01:10:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.29422859298378) internal successors, (8733), 2651 states have internal predecessors, (8733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8733 transitions. [2022-02-11 01:10:04,714 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8733 transitions. Word has length 27 [2022-02-11 01:10:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:04,714 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8733 transitions. [2022-02-11 01:10:04,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8733 transitions. [2022-02-11 01:10:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:04,718 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:04,718 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:04,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:04,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 01:10:04,931 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2105412629, now seen corresponding path program 22 times [2022-02-11 01:10:04,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:04,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917427949] [2022-02-11 01:10:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:04,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:04,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:04,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917427949] [2022-02-11 01:10:04,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917427949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:04,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188114109] [2022-02-11 01:10:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:04,978 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:04,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:10:05,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:05,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:05,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:05,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188114109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:05,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:05,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:10:05,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727643732] [2022-02-11 01:10:05,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:05,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:10:05,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:10:05,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:10:05,223 INFO L87 Difference]: Start difference. First operand 2652 states and 8733 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:06,221 INFO L93 Difference]: Finished difference Result 11005 states and 34872 transitions. [2022-02-11 01:10:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:10:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:06,243 INFO L225 Difference]: With dead ends: 11005 [2022-02-11 01:10:06,243 INFO L226 Difference]: Without dead ends: 11005 [2022-02-11 01:10:06,244 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:10:06,244 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 443 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:06,244 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 217 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2022-02-11 01:10:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 3423. [2022-02-11 01:10:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.4585037989479837) internal successors, (11835), 3422 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 11835 transitions. [2022-02-11 01:10:06,359 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 11835 transitions. Word has length 27 [2022-02-11 01:10:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:06,360 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 11835 transitions. [2022-02-11 01:10:06,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 11835 transitions. [2022-02-11 01:10:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:06,366 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:06,366 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:06,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:06,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 01:10:06,578 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1995653999, now seen corresponding path program 23 times [2022-02-11 01:10:06,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:06,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860497017] [2022-02-11 01:10:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:06,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:06,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860497017] [2022-02-11 01:10:06,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860497017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:06,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719256574] [2022-02-11 01:10:06,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:06,636 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:06,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:10:06,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:10:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:06,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:06,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719256574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:06,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:06,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:10:06,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524519901] [2022-02-11 01:10:06,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:06,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:10:06,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:06,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:10:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:10:06,872 INFO L87 Difference]: Start difference. First operand 3423 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:07,707 INFO L93 Difference]: Finished difference Result 9376 states and 29674 transitions. [2022-02-11 01:10:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:10:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:07,727 INFO L225 Difference]: With dead ends: 9376 [2022-02-11 01:10:07,728 INFO L226 Difference]: Without dead ends: 9376 [2022-02-11 01:10:07,729 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:10:07,729 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 549 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:07,729 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 192 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-02-11 01:10:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 3420. [2022-02-11 01:10:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.4574436969874234) internal successors, (11821), 3419 states have internal predecessors, (11821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 11821 transitions. [2022-02-11 01:10:07,841 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 11821 transitions. Word has length 27 [2022-02-11 01:10:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:07,841 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 11821 transitions. [2022-02-11 01:10:07,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 11821 transitions. [2022-02-11 01:10:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:07,847 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:07,847 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:07,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:08,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 01:10:08,064 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:08,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1623744233, now seen corresponding path program 24 times [2022-02-11 01:10:08,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:08,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945691135] [2022-02-11 01:10:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:08,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:08,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:08,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945691135] [2022-02-11 01:10:08,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945691135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:08,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975122151] [2022-02-11 01:10:08,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:08,113 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:10:08,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:10:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:08,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:08,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:08,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:08,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975122151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:08,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:08,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:10:08,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662074269] [2022-02-11 01:10:08,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:10:08,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:10:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:10:08,294 INFO L87 Difference]: Start difference. First operand 3420 states and 11821 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:08,929 INFO L93 Difference]: Finished difference Result 10210 states and 32078 transitions. [2022-02-11 01:10:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:10:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:08,950 INFO L225 Difference]: With dead ends: 10210 [2022-02-11 01:10:08,950 INFO L226 Difference]: Without dead ends: 10210 [2022-02-11 01:10:08,951 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:10:08,952 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 397 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:08,952 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 188 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:10:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2022-02-11 01:10:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 3434. [2022-02-11 01:10:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.459364986891931) internal successors, (11876), 3433 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11876 transitions. [2022-02-11 01:10:09,118 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11876 transitions. Word has length 27 [2022-02-11 01:10:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:09,119 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11876 transitions. [2022-02-11 01:10:09,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11876 transitions. [2022-02-11 01:10:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:09,125 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:09,125 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:09,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:09,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:09,341 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1434525935, now seen corresponding path program 25 times [2022-02-11 01:10:09,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:09,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294800954] [2022-02-11 01:10:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:09,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294800954] [2022-02-11 01:10:09,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294800954] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796436013] [2022-02-11 01:10:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:09,382 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:09,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:10:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:09,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:09,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796436013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:09,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:09,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:10:09,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348657933] [2022-02-11 01:10:09,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:09,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:10:09,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:10:09,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:10:09,577 INFO L87 Difference]: Start difference. First operand 3434 states and 11876 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:10,087 INFO L93 Difference]: Finished difference Result 9874 states and 31277 transitions. [2022-02-11 01:10:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:10:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:10,108 INFO L225 Difference]: With dead ends: 9874 [2022-02-11 01:10:10,108 INFO L226 Difference]: Without dead ends: 9870 [2022-02-11 01:10:10,109 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:10:10,109 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:10,110 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 185 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-02-11 01:10:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 3434. [2022-02-11 01:10:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-02-11 01:10:10,272 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-02-11 01:10:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:10,272 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-02-11 01:10:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-02-11 01:10:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:10,283 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:10,283 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:10,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:10,483 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1470920145, now seen corresponding path program 26 times [2022-02-11 01:10:10,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:10,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100189956] [2022-02-11 01:10:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:10,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:10,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100189956] [2022-02-11 01:10:10,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100189956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:10,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547083961] [2022-02-11 01:10:10,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:10,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:10,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:10,516 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:10,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:10:10,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:10,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:10,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:10,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547083961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:10,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:10,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:10:10,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521157543] [2022-02-11 01:10:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:10,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:10:10,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:10:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:10:10,651 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:11,219 INFO L93 Difference]: Finished difference Result 8065 states and 25290 transitions. [2022-02-11 01:10:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:10:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:11,244 INFO L225 Difference]: With dead ends: 8065 [2022-02-11 01:10:11,244 INFO L226 Difference]: Without dead ends: 8065 [2022-02-11 01:10:11,246 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 01:10:11,246 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 424 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:11,247 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 229 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-02-11 01:10:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 3440. [2022-02-11 01:10:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.4594358825239895) internal successors, (11897), 3439 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 11897 transitions. [2022-02-11 01:10:11,354 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 11897 transitions. Word has length 27 [2022-02-11 01:10:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:11,355 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 11897 transitions. [2022-02-11 01:10:11,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 11897 transitions. [2022-02-11 01:10:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:11,382 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:11,382 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:11,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:11,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:11,599 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 311729325, now seen corresponding path program 27 times [2022-02-11 01:10:11,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:11,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261781375] [2022-02-11 01:10:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:11,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:11,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261781375] [2022-02-11 01:10:11,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261781375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:11,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742534612] [2022-02-11 01:10:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:11,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:11,632 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:11,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:10:11,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:10:11,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:11,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:10:11,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742534612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:11,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:11,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:10:11,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401161889] [2022-02-11 01:10:11,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:11,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:10:11,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:10:11,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:10:11,787 INFO L87 Difference]: Start difference. First operand 3440 states and 11897 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:12,467 INFO L93 Difference]: Finished difference Result 7992 states and 25480 transitions. [2022-02-11 01:10:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:10:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:12,488 INFO L225 Difference]: With dead ends: 7992 [2022-02-11 01:10:12,489 INFO L226 Difference]: Without dead ends: 7988 [2022-02-11 01:10:12,489 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:10:12,490 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 511 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:12,490 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 187 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:10:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-02-11 01:10:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 3434. [2022-02-11 01:10:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-02-11 01:10:12,584 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-02-11 01:10:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:12,584 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-02-11 01:10:12,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-02-11 01:10:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:12,591 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:12,591 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:12,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:12,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-11 01:10:12,807 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1354997805, now seen corresponding path program 28 times [2022-02-11 01:10:12,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:12,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790884426] [2022-02-11 01:10:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:12,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:12,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790884426] [2022-02-11 01:10:12,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790884426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:12,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507276583] [2022-02-11 01:10:12,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:12,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:12,858 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:12,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:10:12,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:12,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:12,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:13,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507276583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:13,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:13,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:10:13,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661665716] [2022-02-11 01:10:13,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:13,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:10:13,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:10:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:10:13,019 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:13,540 INFO L93 Difference]: Finished difference Result 8817 states and 28422 transitions. [2022-02-11 01:10:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:10:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:13,563 INFO L225 Difference]: With dead ends: 8817 [2022-02-11 01:10:13,563 INFO L226 Difference]: Without dead ends: 8817 [2022-02-11 01:10:13,564 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:10:13,564 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:13,565 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 177 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-02-11 01:10:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 3737. [2022-02-11 01:10:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 3.4494111349036403) internal successors, (12887), 3736 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 12887 transitions. [2022-02-11 01:10:13,723 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 12887 transitions. Word has length 27 [2022-02-11 01:10:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:13,724 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 12887 transitions. [2022-02-11 01:10:13,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 12887 transitions. [2022-02-11 01:10:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:13,730 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:13,731 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:13,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:13,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:13,947 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1165779507, now seen corresponding path program 29 times [2022-02-11 01:10:13,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:13,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661693748] [2022-02-11 01:10:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:13,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:13,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661693748] [2022-02-11 01:10:13,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661693748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:13,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263889013] [2022-02-11 01:10:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:13,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:13,983 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:13,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:10:14,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:10:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:14,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:14,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263889013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:14,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:14,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:10:14,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764172550] [2022-02-11 01:10:14,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:14,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:10:14,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:10:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:10:14,123 INFO L87 Difference]: Start difference. First operand 3737 states and 12887 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:14,608 INFO L93 Difference]: Finished difference Result 8396 states and 27364 transitions. [2022-02-11 01:10:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:10:14,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:14,627 INFO L225 Difference]: With dead ends: 8396 [2022-02-11 01:10:14,627 INFO L226 Difference]: Without dead ends: 8388 [2022-02-11 01:10:14,627 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:10:14,631 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:14,631 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 173 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:10:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-02-11 01:10:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 3725. [2022-02-11 01:10:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.44656283566058) internal successors, (12835), 3724 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 12835 transitions. [2022-02-11 01:10:14,742 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 12835 transitions. Word has length 27 [2022-02-11 01:10:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:14,742 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 12835 transitions. [2022-02-11 01:10:14,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 12835 transitions. [2022-02-11 01:10:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:14,753 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:14,753 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:14,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:14,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:14,968 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1809161767, now seen corresponding path program 30 times [2022-02-11 01:10:14,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:14,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595734591] [2022-02-11 01:10:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:15,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:15,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595734591] [2022-02-11 01:10:15,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595734591] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:15,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265621249] [2022-02-11 01:10:15,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:15,002 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:10:15,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:10:15,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:15,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265621249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:15,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:15,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:10:15,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050968489] [2022-02-11 01:10:15,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:10:15,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:10:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:10:15,138 INFO L87 Difference]: Start difference. First operand 3725 states and 12835 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:15,579 INFO L93 Difference]: Finished difference Result 9052 states and 28913 transitions. [2022-02-11 01:10:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:10:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:15,598 INFO L225 Difference]: With dead ends: 9052 [2022-02-11 01:10:15,599 INFO L226 Difference]: Without dead ends: 9036 [2022-02-11 01:10:15,599 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:10:15,601 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 304 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:15,602 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 188 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-02-11 01:10:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 3753. [2022-02-11 01:10:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.446961620469083) internal successors, (12933), 3752 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 12933 transitions. [2022-02-11 01:10:15,711 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 12933 transitions. Word has length 27 [2022-02-11 01:10:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:15,712 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 12933 transitions. [2022-02-11 01:10:15,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 12933 transitions. [2022-02-11 01:10:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:15,718 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:15,718 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:15,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:15,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 01:10:15,934 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2121517739, now seen corresponding path program 31 times [2022-02-11 01:10:15,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:15,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736529020] [2022-02-11 01:10:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:15,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:15,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736529020] [2022-02-11 01:10:15,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736529020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:15,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911139956] [2022-02-11 01:10:15,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:15,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:15,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:15,987 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:15,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:10:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:16,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:16,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:16,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:16,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911139956] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:16,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:16,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:10:16,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803147779] [2022-02-11 01:10:16,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:16,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:10:16,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:10:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:10:16,154 INFO L87 Difference]: Start difference. First operand 3753 states and 12933 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:16,798 INFO L93 Difference]: Finished difference Result 7240 states and 23141 transitions. [2022-02-11 01:10:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:10:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:16,813 INFO L225 Difference]: With dead ends: 7240 [2022-02-11 01:10:16,813 INFO L226 Difference]: Without dead ends: 7240 [2022-02-11 01:10:16,814 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 01:10:16,834 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 424 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:16,834 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 275 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:10:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2022-02-11 01:10:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 3938. [2022-02-11 01:10:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 3.4384048768097535) internal successors, (13537), 3937 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13537 transitions. [2022-02-11 01:10:16,959 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13537 transitions. Word has length 27 [2022-02-11 01:10:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:16,960 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 13537 transitions. [2022-02-11 01:10:16,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13537 transitions. [2022-02-11 01:10:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:16,968 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:16,968 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:16,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:17,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 01:10:17,191 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -390800087, now seen corresponding path program 32 times [2022-02-11 01:10:17,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:17,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814084403] [2022-02-11 01:10:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:17,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:17,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814084403] [2022-02-11 01:10:17,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814084403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:17,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180862687] [2022-02-11 01:10:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:17,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:17,236 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:17,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:10:17,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:17,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180862687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:17,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:17,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:10:17,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973923808] [2022-02-11 01:10:17,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:17,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:10:17,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:10:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:10:17,433 INFO L87 Difference]: Start difference. First operand 3938 states and 13537 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:18,316 INFO L93 Difference]: Finished difference Result 7155 states and 23290 transitions. [2022-02-11 01:10:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:10:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:18,330 INFO L225 Difference]: With dead ends: 7155 [2022-02-11 01:10:18,330 INFO L226 Difference]: Without dead ends: 7151 [2022-02-11 01:10:18,331 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:10:18,331 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 414 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:18,331 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 195 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-02-11 01:10:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3936. [2022-02-11 01:10:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 3.4373570520965693) internal successors, (13526), 3935 states have internal predecessors, (13526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 13526 transitions. [2022-02-11 01:10:18,455 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 13526 transitions. Word has length 27 [2022-02-11 01:10:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:18,455 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 13526 transitions. [2022-02-11 01:10:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 13526 transitions. [2022-02-11 01:10:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:10:18,461 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:18,461 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:18,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 01:10:18,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-11 01:10:18,663 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1235771539, now seen corresponding path program 33 times [2022-02-11 01:10:18,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:18,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243320193] [2022-02-11 01:10:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:18,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:18,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:18,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243320193] [2022-02-11 01:10:18,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243320193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:18,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156163115] [2022-02-11 01:10:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:18,705 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:10:18,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:10:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:10:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:18,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156163115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:18,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:18,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:10:18,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397687634] [2022-02-11 01:10:18,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:18,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:10:18,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:10:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:10:18,843 INFO L87 Difference]: Start difference. First operand 3936 states and 13526 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:19,314 INFO L93 Difference]: Finished difference Result 6859 states and 22528 transitions. [2022-02-11 01:10:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:10:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:10:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:19,329 INFO L225 Difference]: With dead ends: 6859 [2022-02-11 01:10:19,329 INFO L226 Difference]: Without dead ends: 6843 [2022-02-11 01:10:19,329 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:10:19,330 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 286 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:19,331 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 170 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:10:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-02-11 01:10:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 3932. [2022-02-11 01:10:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 3.435766980412109) internal successors, (13506), 3931 states have internal predecessors, (13506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 13506 transitions. [2022-02-11 01:10:19,413 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 13506 transitions. Word has length 27 [2022-02-11 01:10:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:19,414 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 13506 transitions. [2022-02-11 01:10:19,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 13506 transitions. [2022-02-11 01:10:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:10:19,419 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:19,419 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:19,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:19,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 01:10:19,635 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1788265295, now seen corresponding path program 4 times [2022-02-11 01:10:19,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:19,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919798833] [2022-02-11 01:10:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:19,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:19,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919798833] [2022-02-11 01:10:19,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919798833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:19,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453727321] [2022-02-11 01:10:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:19,935 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:19,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:10:19,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:10:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:20,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 01:10:20,234 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:10:20,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-02-11 01:10:20,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:20,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:10:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:20,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:20,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:20,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:10:20,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:20,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:10:20,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:20,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:20,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:10:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:22,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:22,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:22,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:10:22,616 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:10:22,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:10:22,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:22,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:22,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:10:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:22,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453727321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:22,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:22,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:10:22,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722847496] [2022-02-11 01:10:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:10:22,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:10:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:10:22,912 INFO L87 Difference]: Start difference. First operand 3932 states and 13506 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:26,187 INFO L93 Difference]: Finished difference Result 8297 states and 25821 transitions. [2022-02-11 01:10:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 01:10:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:10:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:26,201 INFO L225 Difference]: With dead ends: 8297 [2022-02-11 01:10:26,201 INFO L226 Difference]: Without dead ends: 8267 [2022-02-11 01:10:26,207 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1225, Invalid=5581, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 01:10:26,219 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 788 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:26,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 377 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:10:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2022-02-11 01:10:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 4021. [2022-02-11 01:10:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 3.435820895522388) internal successors, (13812), 4020 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 13812 transitions. [2022-02-11 01:10:26,307 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 13812 transitions. Word has length 30 [2022-02-11 01:10:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 13812 transitions. [2022-02-11 01:10:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 13812 transitions. [2022-02-11 01:10:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:10:26,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:26,314 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:26,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 01:10:26,527 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 320892227, now seen corresponding path program 5 times [2022-02-11 01:10:26,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:26,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457778378] [2022-02-11 01:10:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:26,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:26,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457778378] [2022-02-11 01:10:26,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457778378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:26,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907104965] [2022-02-11 01:10:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:26,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:26,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:26,785 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:26,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:10:26,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:10:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:10:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:27,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:27,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 01:10:27,193 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:10:27,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-02-11 01:10:27,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:10:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:27,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:27,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:27,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:27,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:10:27,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:27,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:10:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:27,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:10:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:28,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:28,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:28,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:10:28,854 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:10:28,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:10:28,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:28,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:28,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:28,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:10:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:29,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907104965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:29,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:29,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-11 01:10:29,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055662413] [2022-02-11 01:10:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:29,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:10:29,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:10:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:10:29,124 INFO L87 Difference]: Start difference. First operand 4021 states and 13812 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:34,068 INFO L93 Difference]: Finished difference Result 8479 states and 26125 transitions. [2022-02-11 01:10:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:10:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:10:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:34,087 INFO L225 Difference]: With dead ends: 8479 [2022-02-11 01:10:34,088 INFO L226 Difference]: Without dead ends: 8434 [2022-02-11 01:10:34,089 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1622, Invalid=9298, Unknown=0, NotChecked=0, Total=10920 [2022-02-11 01:10:34,089 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 753 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:34,089 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 524 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2235 Invalid, 0 Unknown, 34 Unchecked, 1.1s Time] [2022-02-11 01:10:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2022-02-11 01:10:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 4035. [2022-02-11 01:10:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 3.4338125929598413) internal successors, (13852), 4034 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 13852 transitions. [2022-02-11 01:10:34,212 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 13852 transitions. Word has length 30 [2022-02-11 01:10:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:34,212 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 13852 transitions. [2022-02-11 01:10:34,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 13852 transitions. [2022-02-11 01:10:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:10:34,219 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:34,219 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:34,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:34,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-11 01:10:34,436 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1230267193, now seen corresponding path program 6 times [2022-02-11 01:10:34,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:34,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548785924] [2022-02-11 01:10:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:34,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:34,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548785924] [2022-02-11 01:10:34,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548785924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:34,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51284551] [2022-02-11 01:10:34,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:34,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:34,747 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:34,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:10:34,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:10:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:10:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:35,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:35,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-02-11 01:10:35,192 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:10:35,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 69 [2022-02-11 01:10:35,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:35,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:35,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:10:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:35,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:35,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:35,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:10:35,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:35,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:10:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:35,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:35,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-02-11 01:10:37,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:37,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 01:10:37,292 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-02-11 01:10:37,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2022-02-11 01:10:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:37,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:10:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:37,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51284551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:37,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:37,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-02-11 01:10:37,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084978165] [2022-02-11 01:10:37,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:10:37,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:10:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:10:37,434 INFO L87 Difference]: Start difference. First operand 4035 states and 13852 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:49,812 INFO L93 Difference]: Finished difference Result 8482 states and 27612 transitions. [2022-02-11 01:10:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-11 01:10:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 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 30 [2022-02-11 01:10:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:49,828 INFO L225 Difference]: With dead ends: 8482 [2022-02-11 01:10:49,829 INFO L226 Difference]: Without dead ends: 8431 [2022-02-11 01:10:49,830 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12021 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3638, Invalid=28582, Unknown=0, NotChecked=0, Total=32220 [2022-02-11 01:10:49,830 INFO L934 BasicCegarLoop]: 59 mSDtfsCounter, 886 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 3654 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1345 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:49,831 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 917 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3654 Invalid, 0 Unknown, 1345 Unchecked, 2.1s Time] [2022-02-11 01:10:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2022-02-11 01:10:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 4168. [2022-02-11 01:10:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4167 states have (on average 3.4360451163906887) internal successors, (14318), 4167 states have internal predecessors, (14318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 14318 transitions. [2022-02-11 01:10:49,932 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 14318 transitions. Word has length 30 [2022-02-11 01:10:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:49,932 INFO L470 AbstractCegarLoop]: Abstraction has 4168 states and 14318 transitions. [2022-02-11 01:10:49,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 14318 transitions. [2022-02-11 01:10:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:10:49,943 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:49,943 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:49,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:50,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 01:10:50,152 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1586750758, now seen corresponding path program 34 times [2022-02-11 01:10:50,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:50,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189847911] [2022-02-11 01:10:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:50,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:50,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:50,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189847911] [2022-02-11 01:10:50,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189847911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:50,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176858804] [2022-02-11 01:10:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:50,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:50,527 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:50,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:10:50,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:10:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:50,990 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-02-11 01:10:50,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 188 [2022-02-11 01:10:51,012 INFO L353 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-02-11 01:10:51,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 79 [2022-02-11 01:10:51,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:10:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:51,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:51,248 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:10:51,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-02-11 01:10:51,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:51,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-02-11 01:10:51,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:51,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-02-11 01:10:51,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:51,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-02-11 01:10:51,536 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:10:51,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 01:10:51,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:10:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:51,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176858804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:51,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:51,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 01:10:51,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73449380] [2022-02-11 01:10:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:10:51,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:10:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:10:51,599 INFO L87 Difference]: Start difference. First operand 4168 states and 14318 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:56,377 INFO L93 Difference]: Finished difference Result 7550 states and 24891 transitions. [2022-02-11 01:10:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:10:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:10:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:56,391 INFO L225 Difference]: With dead ends: 7550 [2022-02-11 01:10:56,391 INFO L226 Difference]: Without dead ends: 7503 [2022-02-11 01:10:56,392 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1324, Invalid=8182, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:10:56,392 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:56,393 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 422 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:10:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7503 states. [2022-02-11 01:10:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7503 to 4247. [2022-02-11 01:10:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 3.425341497880358) internal successors, (14544), 4246 states have internal predecessors, (14544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 14544 transitions. [2022-02-11 01:10:56,474 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 14544 transitions. Word has length 30 [2022-02-11 01:10:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:56,474 INFO L470 AbstractCegarLoop]: Abstraction has 4247 states and 14544 transitions. [2022-02-11 01:10:56,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 14544 transitions. [2022-02-11 01:10:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:10:56,480 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:56,480 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:56,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-11 01:10:56,687 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:10:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1397852555, now seen corresponding path program 7 times [2022-02-11 01:10:56,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:56,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214708307] [2022-02-11 01:10:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:56,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214708307] [2022-02-11 01:10:56,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214708307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964719375] [2022-02-11 01:10:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:56,974 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:56,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:10:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:10:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:57,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:57,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 01:10:57,270 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:10:57,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-02-11 01:10:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:57,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:10:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:57,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:57,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:57,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:57,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:10:57,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:57,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:10:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:57,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:57,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:11:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:00,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:00,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:11:00,164 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:11:00,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:11:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:00,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:00,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:11:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:00,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964719375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:00,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:00,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-11 01:11:00,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671058713] [2022-02-11 01:11:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:00,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:00,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:00,740 INFO L87 Difference]: Start difference. First operand 4247 states and 14544 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:04,823 INFO L93 Difference]: Finished difference Result 8973 states and 27677 transitions. [2022-02-11 01:11:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:11:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:11:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:04,840 INFO L225 Difference]: With dead ends: 8973 [2022-02-11 01:11:04,840 INFO L226 Difference]: Without dead ends: 8943 [2022-02-11 01:11:04,840 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1712, Invalid=7408, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 01:11:04,841 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 961 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:04,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 428 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2039 Invalid, 0 Unknown, 37 Unchecked, 1.1s Time] [2022-02-11 01:11:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8943 states. [2022-02-11 01:11:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8943 to 4273. [2022-02-11 01:11:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 3.4262640449438204) internal successors, (14637), 4272 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 14637 transitions. [2022-02-11 01:11:04,938 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 14637 transitions. Word has length 30 [2022-02-11 01:11:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:04,940 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 14637 transitions. [2022-02-11 01:11:04,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 14637 transitions. [2022-02-11 01:11:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:11:04,948 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:04,948 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:04,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-11 01:11:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:05,150 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash 583866602, now seen corresponding path program 35 times [2022-02-11 01:11:05,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:05,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359515120] [2022-02-11 01:11:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:05,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:05,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359515120] [2022-02-11 01:11:05,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359515120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:05,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508427092] [2022-02-11 01:11:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:11:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:05,520 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:11:05,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:11:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:11:05,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:05,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:05,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-11 01:11:05,840 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-02-11 01:11:05,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-02-11 01:11:05,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:11:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:05,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:06,062 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:11:06,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-02-11 01:11:06,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:06,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-02-11 01:11:06,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:06,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:06,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-02-11 01:11:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:08,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-02-11 01:11:08,159 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:11:08,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 01:11:08,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:08,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:11:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:08,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508427092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:08,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:08,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 01:11:08,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230334971] [2022-02-11 01:11:08,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:08,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:08,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:08,248 INFO L87 Difference]: Start difference. First operand 4273 states and 14637 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:14,925 INFO L93 Difference]: Finished difference Result 9455 states and 30775 transitions. [2022-02-11 01:11:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-11 01:11:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 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 30 [2022-02-11 01:11:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:14,943 INFO L225 Difference]: With dead ends: 9455 [2022-02-11 01:11:14,943 INFO L226 Difference]: Without dead ends: 9408 [2022-02-11 01:11:14,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2512, Invalid=12740, Unknown=0, NotChecked=0, Total=15252 [2022-02-11 01:11:14,944 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 741 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:14,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 721 Invalid, 4039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3557 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:11:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-02-11 01:11:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 4295. [2022-02-11 01:11:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.426408942710759) internal successors, (14713), 4294 states have internal predecessors, (14713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 14713 transitions. [2022-02-11 01:11:15,059 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 14713 transitions. Word has length 30 [2022-02-11 01:11:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:15,059 INFO L470 AbstractCegarLoop]: Abstraction has 4295 states and 14713 transitions. [2022-02-11 01:11:15,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 14713 transitions. [2022-02-11 01:11:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:11:15,066 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:15,066 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:15,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:15,279 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1072387290, now seen corresponding path program 36 times [2022-02-11 01:11:15,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:15,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446234164] [2022-02-11 01:11:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:15,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:15,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446234164] [2022-02-11 01:11:15,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446234164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:15,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724887477] [2022-02-11 01:11:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:11:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:15,648 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:15,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:11:15,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:11:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:11:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:16,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:16,047 INFO L353 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-02-11 01:11:16,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2022-02-11 01:11:16,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:16,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 200 [2022-02-11 01:11:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:16,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:16,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-02-11 01:11:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:16,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:16,919 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:11:16,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-02-11 01:11:16,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:16,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-02-11 01:11:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:16,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:16,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-02-11 01:11:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:18,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:18,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-02-11 01:11:18,512 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:11:18,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 01:11:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:18,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:11:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:18,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724887477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:18,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:18,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-02-11 01:11:18,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027630230] [2022-02-11 01:11:18,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:18,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:11:18,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:11:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:11:18,578 INFO L87 Difference]: Start difference. First operand 4295 states and 14713 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:39,132 INFO L93 Difference]: Finished difference Result 13475 states and 43173 transitions. [2022-02-11 01:11:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-02-11 01:11:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 30 [2022-02-11 01:11:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:39,169 INFO L225 Difference]: With dead ends: 13475 [2022-02-11 01:11:39,169 INFO L226 Difference]: Without dead ends: 13421 [2022-02-11 01:11:39,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47099 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=9775, Invalid=98137, Unknown=0, NotChecked=0, Total=107912 [2022-02-11 01:11:39,176 INFO L934 BasicCegarLoop]: 94 mSDtfsCounter, 1181 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 7440 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 8058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 7440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:39,177 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1589 Invalid, 8058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 7440 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-11 01:11:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2022-02-11 01:11:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 4466. [2022-02-11 01:11:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 4465 states have (on average 3.4150055991041435) internal successors, (15248), 4465 states have internal predecessors, (15248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 15248 transitions. [2022-02-11 01:11:39,331 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 15248 transitions. Word has length 30 [2022-02-11 01:11:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 4466 states and 15248 transitions. [2022-02-11 01:11:39,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 15248 transitions. [2022-02-11 01:11:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:11:39,340 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:39,340 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:39,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-11 01:11:39,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 01:11:39,541 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1552290073, now seen corresponding path program 8 times [2022-02-11 01:11:39,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:39,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760810037] [2022-02-11 01:11:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:39,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:39,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760810037] [2022-02-11 01:11:39,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760810037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:39,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231031307] [2022-02-11 01:11:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:11:39,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:39,829 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:39,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:11:39,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:11:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:11:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-11 01:11:40,230 INFO L353 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2022-02-11 01:11:40,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 01:11:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:40,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:11:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:40,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:40,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:40,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:40,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:11:40,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:40,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:11:40,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:40,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:40,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:11:42,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:42,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:42,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:11:42,864 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:11:42,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:11:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:42,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:42,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:42,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:11:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:43,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231031307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:43,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:43,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-02-11 01:11:43,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232025725] [2022-02-11 01:11:43,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:43,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:11:43,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:11:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:11:43,339 INFO L87 Difference]: Start difference. First operand 4466 states and 15248 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:47,892 INFO L93 Difference]: Finished difference Result 9266 states and 28594 transitions. [2022-02-11 01:11:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:11:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:11:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:47,915 INFO L225 Difference]: With dead ends: 9266 [2022-02-11 01:11:47,916 INFO L226 Difference]: Without dead ends: 9244 [2022-02-11 01:11:47,917 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1713, Invalid=7793, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:11:47,917 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 809 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:47,917 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 515 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2464 Invalid, 0 Unknown, 134 Unchecked, 1.3s Time] [2022-02-11 01:11:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2022-02-11 01:11:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 4458. [2022-02-11 01:11:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 3.4157505048238725) internal successors, (15224), 4457 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 15224 transitions. [2022-02-11 01:11:48,033 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 15224 transitions. Word has length 30 [2022-02-11 01:11:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:48,033 INFO L470 AbstractCegarLoop]: Abstraction has 4458 states and 15224 transitions. [2022-02-11 01:11:48,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 15224 transitions. [2022-02-11 01:11:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:11:48,043 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:48,043 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:48,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:48,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 01:11:48,260 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 912501523, now seen corresponding path program 9 times [2022-02-11 01:11:48,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:48,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784519937] [2022-02-11 01:11:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:48,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:48,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784519937] [2022-02-11 01:11:48,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784519937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:48,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755135836] [2022-02-11 01:11:48,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:11:48,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:48,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:48,553 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:48,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:11:48,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:11:48,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:11:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:48,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:48,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 01:11:48,995 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:11:48,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-02-11 01:11:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:48,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:11:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:49,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:49,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:49,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:11:49,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:49,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:11:49,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:49,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:49,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:11:51,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:51,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:51,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:51,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:11:51,297 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:11:51,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:11:51,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:51,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:51,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:11:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:51,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755135836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:51,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:51,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:11:51,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499330260] [2022-02-11 01:11:51,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:51,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:51,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:51,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:51,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:51,744 INFO L87 Difference]: Start difference. First operand 4458 states and 15224 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:55,376 INFO L93 Difference]: Finished difference Result 8337 states and 26153 transitions. [2022-02-11 01:11:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:11:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:11:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:55,391 INFO L225 Difference]: With dead ends: 8337 [2022-02-11 01:11:55,391 INFO L226 Difference]: Without dead ends: 8307 [2022-02-11 01:11:55,392 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1434, Invalid=6938, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 01:11:55,392 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 626 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:55,392 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 401 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:11:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8307 states. [2022-02-11 01:11:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8307 to 4475. [2022-02-11 01:11:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 3.4148413053196247) internal successors, (15278), 4474 states have internal predecessors, (15278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 15278 transitions. [2022-02-11 01:11:55,479 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 15278 transitions. Word has length 30 [2022-02-11 01:11:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:55,479 INFO L470 AbstractCegarLoop]: Abstraction has 4475 states and 15278 transitions. [2022-02-11 01:11:55,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 15278 transitions. [2022-02-11 01:11:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:11:55,485 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:55,486 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:55,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 01:11:55,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-11 01:11:55,687 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:11:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -554871545, now seen corresponding path program 10 times [2022-02-11 01:11:55,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:55,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185590011] [2022-02-11 01:11:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:55,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:55,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185590011] [2022-02-11 01:11:55,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185590011] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:55,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843371102] [2022-02-11 01:11:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:11:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:55,986 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:55,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:11:56,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:11:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:11:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:11:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:56,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-11 01:11:56,311 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:11:56,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-02-11 01:11:56,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:11:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:56,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:56,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:56,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:11:56,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:56,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:11:56,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:56,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:56,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:11:58,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:58,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:58,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:11:58,428 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:11:58,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:11:58,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:58,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:58,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:58,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:11:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:58,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843371102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:58,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:58,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-11 01:11:58,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527877756] [2022-02-11 01:11:58,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:58,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:58,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:58,964 INFO L87 Difference]: Start difference. First operand 4475 states and 15278 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:02,877 INFO L93 Difference]: Finished difference Result 8295 states and 26041 transitions. [2022-02-11 01:12:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:12:02,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:12:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:02,894 INFO L225 Difference]: With dead ends: 8295 [2022-02-11 01:12:02,894 INFO L226 Difference]: Without dead ends: 8265 [2022-02-11 01:12:02,895 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1415, Invalid=6417, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 01:12:02,896 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 693 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:02,896 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 326 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1754 Invalid, 0 Unknown, 95 Unchecked, 1.1s Time] [2022-02-11 01:12:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2022-02-11 01:12:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 4467. [2022-02-11 01:12:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4466 states have (on average 3.416256157635468) internal successors, (15257), 4466 states have internal predecessors, (15257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 15257 transitions. [2022-02-11 01:12:02,997 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 15257 transitions. Word has length 30 [2022-02-11 01:12:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:02,997 INFO L470 AbstractCegarLoop]: Abstraction has 4467 states and 15257 transitions. [2022-02-11 01:12:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 15257 transitions. [2022-02-11 01:12:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:12:03,004 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:03,004 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:03,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:03,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:03,207 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -173394005, now seen corresponding path program 11 times [2022-02-11 01:12:03,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:03,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936822080] [2022-02-11 01:12:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:03,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:03,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:03,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936822080] [2022-02-11 01:12:03,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936822080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:03,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976976809] [2022-02-11 01:12:03,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:03,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:03,482 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:03,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:12:03,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:12:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:12:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:03,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:03,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 01:12:03,803 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:12:03,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-02-11 01:12:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:03,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:12:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:03,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:04,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:12:04,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:12:04,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:12:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:12:04,870 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:12:04,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:12:04,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:12:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:05,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976976809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:05,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:05,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-02-11 01:12:05,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067131010] [2022-02-11 01:12:05,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:05,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:12:05,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:12:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:12:05,250 INFO L87 Difference]: Start difference. First operand 4467 states and 15257 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:15,111 INFO L93 Difference]: Finished difference Result 8893 states and 27493 transitions. [2022-02-11 01:12:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-11 01:12:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 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 30 [2022-02-11 01:12:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:15,129 INFO L225 Difference]: With dead ends: 8893 [2022-02-11 01:12:15,129 INFO L226 Difference]: Without dead ends: 8863 [2022-02-11 01:12:15,131 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2593, Invalid=19163, Unknown=0, NotChecked=0, Total=21756 [2022-02-11 01:12:15,131 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 717 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:15,131 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 976 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:12:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8863 states. [2022-02-11 01:12:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8863 to 4476. [2022-02-11 01:12:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 3.4174301675977654) internal successors, (15293), 4475 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 15293 transitions. [2022-02-11 01:12:15,245 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 15293 transitions. Word has length 30 [2022-02-11 01:12:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:15,245 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 15293 transitions. [2022-02-11 01:12:15,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 15293 transitions. [2022-02-11 01:12:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:12:15,252 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:15,252 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:15,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:15,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 01:12:15,468 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:12:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash -242471051, now seen corresponding path program 12 times [2022-02-11 01:12:15,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:15,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107522071] [2022-02-11 01:12:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:15,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:15,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107522071] [2022-02-11 01:12:15,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107522071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:15,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65913719] [2022-02-11 01:12:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:15,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:15,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:15,715 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:15,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 01:12:15,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:12:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:12:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:17,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:17,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 56 [2022-02-11 01:12:17,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:17,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-02-11 01:12:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:17,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:17,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:12:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:17,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:18,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:18,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:18,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 101 [2022-02-11 01:12:18,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:18,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-02-11 01:12:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:18,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:18,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 99 [2022-02-11 01:12:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:18,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65913719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:18,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:18,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 01:12:18,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857670654] [2022-02-11 01:12:18,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:18,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:12:18,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:12:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1117, Unknown=2, NotChecked=0, Total=1260 [2022-02-11 01:12:18,932 INFO L87 Difference]: Start difference. First operand 4476 states and 15293 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:49,347 WARN L228 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 124 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:13:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:26,500 INFO L93 Difference]: Finished difference Result 12251 states and 40954 transitions. [2022-02-11 01:13:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-11 01:13:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:13:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:26,528 INFO L225 Difference]: With dead ends: 12251 [2022-02-11 01:13:26,529 INFO L226 Difference]: Without dead ends: 12221 [2022-02-11 01:13:26,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10029 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=3306, Invalid=24065, Unknown=19, NotChecked=0, Total=27390 [2022-02-11 01:13:26,534 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 667 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:26,535 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 879 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2598 Invalid, 0 Unknown, 2080 Unchecked, 1.6s Time] [2022-02-11 01:13:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2022-02-11 01:13:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 4581. [2022-02-11 01:13:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.427292576419214) internal successors, (15697), 4580 states have internal predecessors, (15697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 15697 transitions. [2022-02-11 01:13:26,685 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 15697 transitions. Word has length 30 [2022-02-11 01:13:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 15697 transitions. [2022-02-11 01:13:26,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 15697 transitions. [2022-02-11 01:13:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:13:26,696 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:26,696 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:26,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:26,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:26,913 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1966576565, now seen corresponding path program 13 times [2022-02-11 01:13:26,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:26,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145913695] [2022-02-11 01:13:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:26,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:27,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:27,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145913695] [2022-02-11 01:13:27,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145913695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:27,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055818284] [2022-02-11 01:13:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:27,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:27,381 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:27,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 01:13:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:27,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:13:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:13:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:27,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-11 01:13:27,779 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:13:27,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 34 [2022-02-11 01:13:27,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:13:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:27,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:28,172 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:13:28,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:13:28,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:28,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:13:28,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:28,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:13:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:30,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:30,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:30,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:13:30,492 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:13:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:13:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:30,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:30,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:30,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:13:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:31,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055818284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:31,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:31,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:13:31,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630574003] [2022-02-11 01:13:31,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:13:31,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:31,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:13:31,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:13:31,101 INFO L87 Difference]: Start difference. First operand 4581 states and 15697 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:38,341 INFO L93 Difference]: Finished difference Result 9097 states and 29208 transitions. [2022-02-11 01:13:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 01:13:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:13:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:38,361 INFO L225 Difference]: With dead ends: 9097 [2022-02-11 01:13:38,361 INFO L226 Difference]: Without dead ends: 9063 [2022-02-11 01:13:38,362 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3651 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1440, Invalid=10116, Unknown=0, NotChecked=0, Total=11556 [2022-02-11 01:13:38,364 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 608 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 3670 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:38,364 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 625 Invalid, 3884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3670 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-11 01:13:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2022-02-11 01:13:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 4616. [2022-02-11 01:13:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 3.4238353196099673) internal successors, (15801), 4615 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 15801 transitions. [2022-02-11 01:13:38,468 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 15801 transitions. Word has length 30 [2022-02-11 01:13:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:38,468 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 15801 transitions. [2022-02-11 01:13:38,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 15801 transitions. [2022-02-11 01:13:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:13:38,475 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:38,475 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:38,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 01:13:38,691 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash 857420597, now seen corresponding path program 14 times [2022-02-11 01:13:38,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:38,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249072637] [2022-02-11 01:13:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:38,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:38,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249072637] [2022-02-11 01:13:38,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249072637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:38,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005141455] [2022-02-11 01:13:38,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:38,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:38,934 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:38,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 01:13:38,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:38,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:13:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:39,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:39,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 58 [2022-02-11 01:13:39,342 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:13:39,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 69 [2022-02-11 01:13:39,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:39,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:13:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:39,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:40,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:13:40,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:40,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:13:40,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:40,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-02-11 01:13:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:41,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 01:13:41,283 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-02-11 01:13:41,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2022-02-11 01:13:41,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:41,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:13:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:41,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005141455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:41,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:41,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-02-11 01:13:41,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033072137] [2022-02-11 01:13:41,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:41,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:13:41,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:13:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:13:41,405 INFO L87 Difference]: Start difference. First operand 4616 states and 15801 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:03,114 INFO L93 Difference]: Finished difference Result 11751 states and 37816 transitions. [2022-02-11 01:14:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-02-11 01:14:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:14:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:03,137 INFO L225 Difference]: With dead ends: 11751 [2022-02-11 01:14:03,137 INFO L226 Difference]: Without dead ends: 11698 [2022-02-11 01:14:03,147 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22128 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=7340, Invalid=46716, Unknown=0, NotChecked=0, Total=54056 [2022-02-11 01:14:03,147 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 1194 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 7484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1517 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:03,148 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 1630 Invalid, 7484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 5549 Invalid, 0 Unknown, 1517 Unchecked, 3.3s Time] [2022-02-11 01:14:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11698 states. [2022-02-11 01:14:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11698 to 4650. [2022-02-11 01:14:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 3.4314906431490644) internal successors, (15953), 4649 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 15953 transitions. [2022-02-11 01:14:03,269 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 15953 transitions. Word has length 30 [2022-02-11 01:14:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:03,270 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 15953 transitions. [2022-02-11 01:14:03,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 15953 transitions. [2022-02-11 01:14:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:14:03,277 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:03,277 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:03,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:03,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-11 01:14:03,493 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1825899231, now seen corresponding path program 15 times [2022-02-11 01:14:03,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:03,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835305055] [2022-02-11 01:14:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:03,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:03,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:03,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835305055] [2022-02-11 01:14:03,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835305055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:03,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449470999] [2022-02-11 01:14:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:03,806 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 01:14:03,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:14:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:14:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:04,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:04,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2022-02-11 01:14:04,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:04,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-02-11 01:14:04,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:04,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:04,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:14:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:04,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:04,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:04,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-02-11 01:14:04,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:04,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-02-11 01:14:05,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:05,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-02-11 01:14:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:13,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449470999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:13,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:13,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-11 01:14:13,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135684218] [2022-02-11 01:14:13,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:13,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:14:13,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:14:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:14:13,979 INFO L87 Difference]: Start difference. First operand 4650 states and 15953 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:14,698 WARN L228 SmtUtils]: Spent 45.23s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:15:32,501 WARN L228 SmtUtils]: Spent 13.92s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:15:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:40,389 INFO L93 Difference]: Finished difference Result 9083 states and 28913 transitions. [2022-02-11 01:15:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-11 01:15:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:40,407 INFO L225 Difference]: With dead ends: 9083 [2022-02-11 01:15:40,407 INFO L226 Difference]: Without dead ends: 9038 [2022-02-11 01:15:40,408 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4917 ImplicationChecksByTransitivity, 85.9s TimeCoverageRelationStatistics Valid=2289, Invalid=10127, Unknown=16, NotChecked=0, Total=12432 [2022-02-11 01:15:40,408 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 608 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:40,408 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 448 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1430 Invalid, 0 Unknown, 1306 Unchecked, 0.9s Time] [2022-02-11 01:15:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9038 states. [2022-02-11 01:15:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9038 to 4652. [2022-02-11 01:15:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 3.431950118254139) internal successors, (15962), 4651 states have internal predecessors, (15962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 15962 transitions. [2022-02-11 01:15:40,558 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 15962 transitions. Word has length 30 [2022-02-11 01:15:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 15962 transitions. [2022-02-11 01:15:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 15962 transitions. [2022-02-11 01:15:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:40,564 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:40,564 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:40,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:40,769 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1512143957, now seen corresponding path program 16 times [2022-02-11 01:15:40,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:40,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931718128] [2022-02-11 01:15:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:41,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:41,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931718128] [2022-02-11 01:15:41,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931718128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:41,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725415393] [2022-02-11 01:15:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:41,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:41,068 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:41,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 01:15:41,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:15:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:15:41,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:41,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 01:15:41,466 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:15:41,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-02-11 01:15:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:41,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:15:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:41,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:41,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:15:41,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:41,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:15:41,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:41,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:41,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:15:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:43,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:43,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:15:43,789 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:15:43,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:15:43,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:43,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:43,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:15:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:44,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725415393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:44,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:44,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-11 01:15:44,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796300214] [2022-02-11 01:15:44,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:44,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:15:44,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:15:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:15:44,193 INFO L87 Difference]: Start difference. First operand 4652 states and 15962 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:49,420 INFO L93 Difference]: Finished difference Result 10341 states and 31975 transitions. [2022-02-11 01:15:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 01:15:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:49,442 INFO L225 Difference]: With dead ends: 10341 [2022-02-11 01:15:49,442 INFO L226 Difference]: Without dead ends: 10311 [2022-02-11 01:15:49,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2146, Invalid=8566, Unknown=0, NotChecked=0, Total=10712 [2022-02-11 01:15:49,444 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 868 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:49,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 460 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2079 Invalid, 0 Unknown, 33 Unchecked, 1.2s Time] [2022-02-11 01:15:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2022-02-11 01:15:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 4677. [2022-02-11 01:15:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 3.4362703165098374) internal successors, (16068), 4676 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 16068 transitions. [2022-02-11 01:15:49,573 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 16068 transitions. Word has length 30 [2022-02-11 01:15:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:49,573 INFO L470 AbstractCegarLoop]: Abstraction has 4677 states and 16068 transitions. [2022-02-11 01:15:49,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 16068 transitions. [2022-02-11 01:15:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:49,600 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:49,600 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:49,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-11 01:15:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-11 01:15:49,812 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1089229415, now seen corresponding path program 17 times [2022-02-11 01:15:49,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:49,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456547083] [2022-02-11 01:15:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:50,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:50,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456547083] [2022-02-11 01:15:50,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456547083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:50,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581236530] [2022-02-11 01:15:50,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:15:50,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:50,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:50,128 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:50,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:15:50,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:50,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 01:15:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:15:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:50,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 01:15:50,643 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:15:50,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-02-11 01:15:50,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:50,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:15:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:50,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:50,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:50,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:15:50,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:50,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:15:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:51,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:51,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:15:52,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:52,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:52,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:15:52,985 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:15:52,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:15:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:52,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:53,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:53,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:15:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:53,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581236530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:53,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:53,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-11 01:15:53,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649666064] [2022-02-11 01:15:53,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:53,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:15:53,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:15:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:15:53,389 INFO L87 Difference]: Start difference. First operand 4677 states and 16068 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:04,484 INFO L93 Difference]: Finished difference Result 12615 states and 38355 transitions. [2022-02-11 01:16:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-11 01:16:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:04,511 INFO L225 Difference]: With dead ends: 12615 [2022-02-11 01:16:04,511 INFO L226 Difference]: Without dead ends: 12585 [2022-02-11 01:16:04,513 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11900 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4342, Invalid=23714, Unknown=0, NotChecked=0, Total=28056 [2022-02-11 01:16:04,513 INFO L934 BasicCegarLoop]: 48 mSDtfsCounter, 778 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:04,513 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 787 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2662 Invalid, 0 Unknown, 1027 Unchecked, 1.7s Time] [2022-02-11 01:16:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12585 states. [2022-02-11 01:16:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12585 to 4679. [2022-02-11 01:16:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.436725096194955) internal successors, (16077), 4678 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 16077 transitions. [2022-02-11 01:16:04,680 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 16077 transitions. Word has length 30 [2022-02-11 01:16:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:04,680 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 16077 transitions. [2022-02-11 01:16:04,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 16077 transitions. [2022-02-11 01:16:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:04,687 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:04,687 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:04,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:04,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-11 01:16:04,904 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1400189745, now seen corresponding path program 18 times [2022-02-11 01:16:04,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:04,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442825024] [2022-02-11 01:16:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:05,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:05,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442825024] [2022-02-11 01:16:05,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442825024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:05,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685899896] [2022-02-11 01:16:05,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:05,209 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:05,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 01:16:05,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:16:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:16:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:05,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:05,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-02-11 01:16:05,593 INFO L353 Elim1Store]: treesize reduction 45, result has 57.1 percent of original size [2022-02-11 01:16:05,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 72 [2022-02-11 01:16:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:05,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 65 [2022-02-11 01:16:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:05,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:05,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:06,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:06,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:16:06,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:06,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:16:06,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:06,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:06,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:16:08,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:08,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:08,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:08,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:16:08,588 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:16:08,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:16:08,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:08,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:08,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:08,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:16:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:09,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685899896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:09,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:09,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-11 01:16:09,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393593487] [2022-02-11 01:16:09,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:09,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:16:09,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:16:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:16:09,129 INFO L87 Difference]: Start difference. First operand 4679 states and 16077 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:15,494 INFO L93 Difference]: Finished difference Result 11343 states and 35448 transitions. [2022-02-11 01:16:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-11 01:16:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:15,520 INFO L225 Difference]: With dead ends: 11343 [2022-02-11 01:16:15,521 INFO L226 Difference]: Without dead ends: 11313 [2022-02-11 01:16:15,522 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2546, Invalid=10336, Unknown=0, NotChecked=0, Total=12882 [2022-02-11 01:16:15,522 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 898 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:15,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 536 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2390 Invalid, 0 Unknown, 713 Unchecked, 1.6s Time] [2022-02-11 01:16:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-02-11 01:16:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 4691. [2022-02-11 01:16:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 3.438592750533049) internal successors, (16127), 4690 states have internal predecessors, (16127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 16127 transitions. [2022-02-11 01:16:15,669 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 16127 transitions. Word has length 30 [2022-02-11 01:16:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:15,669 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 16127 transitions. [2022-02-11 01:16:15,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 16127 transitions. [2022-02-11 01:16:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:15,677 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:15,677 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:15,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:15,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:15,893 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2132440842, now seen corresponding path program 37 times [2022-02-11 01:16:15,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:15,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034771957] [2022-02-11 01:16:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:15,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:16,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:16,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034771957] [2022-02-11 01:16:16,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034771957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:16,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829200576] [2022-02-11 01:16:16,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:16,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:16,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:16,520 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 01:16:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:16:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:17,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-02-11 01:16:17,086 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-02-11 01:16:17,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 40 [2022-02-11 01:16:17,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:16:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:17,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:17,490 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:16:17,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-02-11 01:16:17,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:17,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-02-11 01:16:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:17,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:17,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-02-11 01:16:18,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:18,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:18,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-02-11 01:16:18,299 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:16:18,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 01:16:18,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:18,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:16:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:18,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829200576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:18,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:18,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 01:16:18,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074276384] [2022-02-11 01:16:18,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:18,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:18,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:18,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:18,469 INFO L87 Difference]: Start difference. First operand 4691 states and 16127 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:25,585 INFO L93 Difference]: Finished difference Result 8272 states and 27313 transitions. [2022-02-11 01:16:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:16:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:25,605 INFO L225 Difference]: With dead ends: 8272 [2022-02-11 01:16:25,605 INFO L226 Difference]: Without dead ends: 8225 [2022-02-11 01:16:25,606 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1591, Invalid=9539, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:16:25,612 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 556 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:25,612 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 533 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:16:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-02-11 01:16:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 4688. [2022-02-11 01:16:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.4384467676552166) internal successors, (16116), 4687 states have internal predecessors, (16116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16116 transitions. [2022-02-11 01:16:25,722 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16116 transitions. Word has length 30 [2022-02-11 01:16:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:25,723 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 16116 transitions. [2022-02-11 01:16:25,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16116 transitions. [2022-02-11 01:16:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:25,730 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:25,730 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:25,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:25,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:25,946 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1956652829, now seen corresponding path program 19 times [2022-02-11 01:16:25,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:25,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028623601] [2022-02-11 01:16:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:26,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:26,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028623601] [2022-02-11 01:16:26,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028623601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:26,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571332048] [2022-02-11 01:16:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:26,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:26,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:26,238 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:26,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 01:16:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:16:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:26,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:26,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-11 01:16:26,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:26,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-02-11 01:16:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:26,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:26,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:16:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:26,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:26,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:27,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:27,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:16:27,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:27,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:16:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:27,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:27,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:16:27,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:27,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:27,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:16:28,031 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:16:28,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:16:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:28,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:16:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:28,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571332048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:28,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:28,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-11 01:16:28,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904027048] [2022-02-11 01:16:28,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:28,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:16:28,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:16:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:16:28,551 INFO L87 Difference]: Start difference. First operand 4688 states and 16116 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:35,834 INFO L93 Difference]: Finished difference Result 11545 states and 35977 transitions. [2022-02-11 01:16:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 01:16:35,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:35,860 INFO L225 Difference]: With dead ends: 11545 [2022-02-11 01:16:35,861 INFO L226 Difference]: Without dead ends: 11530 [2022-02-11 01:16:35,862 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5815 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2022-02-11 01:16:35,862 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 991 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:35,862 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 581 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2645 Invalid, 0 Unknown, 532 Unchecked, 1.8s Time] [2022-02-11 01:16:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11530 states. [2022-02-11 01:16:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11530 to 4686. [2022-02-11 01:16:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 3.437993596584845) internal successors, (16107), 4685 states have internal predecessors, (16107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 16107 transitions. [2022-02-11 01:16:36,006 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 16107 transitions. Word has length 30 [2022-02-11 01:16:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:36,006 INFO L470 AbstractCegarLoop]: Abstraction has 4686 states and 16107 transitions. [2022-02-11 01:16:36,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 16107 transitions. [2022-02-11 01:16:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:36,014 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:36,014 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:36,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:36,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:36,230 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1686862121, now seen corresponding path program 20 times [2022-02-11 01:16:36,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:36,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557840907] [2022-02-11 01:16:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:36,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:36,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:36,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557840907] [2022-02-11 01:16:36,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557840907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:36,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021128491] [2022-02-11 01:16:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:36,594 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:36,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:36,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:36,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 01:16:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:16:36,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:37,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:37,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-02-11 01:16:37,058 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:16:37,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 62 [2022-02-11 01:16:37,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:37,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:16:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:37,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:37,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:16:37,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:37,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:16:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:37,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:37,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-02-11 01:16:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:38,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 01:16:39,002 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-02-11 01:16:39,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2022-02-11 01:16:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:39,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:16:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:39,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021128491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:39,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:39,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-02-11 01:16:39,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305470199] [2022-02-11 01:16:39,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:16:39,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:16:39,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:16:39,154 INFO L87 Difference]: Start difference. First operand 4686 states and 16107 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:00,229 INFO L93 Difference]: Finished difference Result 10991 states and 35565 transitions. [2022-02-11 01:17:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-02-11 01:17:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 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 30 [2022-02-11 01:17:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:00,305 INFO L225 Difference]: With dead ends: 10991 [2022-02-11 01:17:00,306 INFO L226 Difference]: Without dead ends: 10917 [2022-02-11 01:17:00,308 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22062 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=6063, Invalid=48927, Unknown=0, NotChecked=0, Total=54990 [2022-02-11 01:17:00,308 INFO L934 BasicCegarLoop]: 87 mSDtfsCounter, 1087 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 5397 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 7353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 5397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:00,308 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1626 Invalid, 7353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 5397 Invalid, 0 Unknown, 1551 Unchecked, 3.5s Time] [2022-02-11 01:17:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2022-02-11 01:17:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 4709. [2022-02-11 01:17:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.441163976210705) internal successors, (16201), 4708 states have internal predecessors, (16201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 16201 transitions. [2022-02-11 01:17:00,446 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 16201 transitions. Word has length 30 [2022-02-11 01:17:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:00,446 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 16201 transitions. [2022-02-11 01:17:00,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 16201 transitions. [2022-02-11 01:17:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:00,454 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:00,454 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:00,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:00,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 01:17:00,670 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash -738691041, now seen corresponding path program 21 times [2022-02-11 01:17:00,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:00,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546810678] [2022-02-11 01:17:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:01,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:01,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546810678] [2022-02-11 01:17:01,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546810678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:01,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114562568] [2022-02-11 01:17:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:17:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:01,045 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:01,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 01:17:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:17:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:17:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:02,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:02,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-11 01:17:02,536 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:17:02,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-02-11 01:17:02,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:02,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:17:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:04,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:04,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 116 [2022-02-11 01:17:04,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:04,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 110 [2022-02-11 01:17:04,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:04,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-02-11 01:17:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:11,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114562568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:11,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:11,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:17:11,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090813242] [2022-02-11 01:17:11,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:11,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:17:11,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:17:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=788, Unknown=1, NotChecked=0, Total=930 [2022-02-11 01:17:11,231 INFO L87 Difference]: Start difference. First operand 4709 states and 16201 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:30,648 WARN L228 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:17:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:32,946 INFO L93 Difference]: Finished difference Result 8812 states and 27942 transitions. [2022-02-11 01:17:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:17:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:32,965 INFO L225 Difference]: With dead ends: 8812 [2022-02-11 01:17:32,965 INFO L226 Difference]: Without dead ends: 8755 [2022-02-11 01:17:32,966 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1275, Invalid=6730, Unknown=5, NotChecked=0, Total=8010 [2022-02-11 01:17:32,966 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 439 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 946 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:32,966 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 377 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1937 Invalid, 0 Unknown, 946 Unchecked, 1.2s Time] [2022-02-11 01:17:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8755 states. [2022-02-11 01:17:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8755 to 4731. [2022-02-11 01:17:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4730 states have (on average 3.441860465116279) internal successors, (16280), 4730 states have internal predecessors, (16280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 16280 transitions. [2022-02-11 01:17:33,090 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 16280 transitions. Word has length 30 [2022-02-11 01:17:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:33,091 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 16280 transitions. [2022-02-11 01:17:33,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 16280 transitions. [2022-02-11 01:17:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:33,100 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:33,100 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:33,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-11 01:17:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-11 01:17:33,307 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -822012935, now seen corresponding path program 22 times [2022-02-11 01:17:33,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:33,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073421691] [2022-02-11 01:17:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:33,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:33,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073421691] [2022-02-11 01:17:33,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073421691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:33,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724758039] [2022-02-11 01:17:33,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:17:33,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:33,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:33,621 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:33,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 01:17:33,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:17:33,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:17:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:33,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:33,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:17:33,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:33,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-02-11 01:17:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:33,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:33,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:17:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:34,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:34,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:34,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:34,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:17:34,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:34,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:17:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:34,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:34,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:17:35,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:35,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:35,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:35,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:17:35,504 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:17:35,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:17:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:35,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:35,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:17:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:36,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724758039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:36,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:36,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:17:36,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394046895] [2022-02-11 01:17:36,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:36,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:17:36,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:17:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:17:36,046 INFO L87 Difference]: Start difference. First operand 4731 states and 16280 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:43,396 INFO L93 Difference]: Finished difference Result 9934 states and 31252 transitions. [2022-02-11 01:17:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-11 01:17:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:43,417 INFO L225 Difference]: With dead ends: 9934 [2022-02-11 01:17:43,417 INFO L226 Difference]: Without dead ends: 9833 [2022-02-11 01:17:43,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6182 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2456, Invalid=14314, Unknown=0, NotChecked=0, Total=16770 [2022-02-11 01:17:43,418 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 582 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:43,418 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 555 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:17:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2022-02-11 01:17:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 4765. [2022-02-11 01:17:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 4764 states have (on average 3.445424013434089) internal successors, (16414), 4764 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 16414 transitions. [2022-02-11 01:17:43,552 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 16414 transitions. Word has length 30 [2022-02-11 01:17:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 16414 transitions. [2022-02-11 01:17:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 16414 transitions. [2022-02-11 01:17:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:43,562 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:43,562 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:43,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:43,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-11 01:17:43,781 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash -460915169, now seen corresponding path program 23 times [2022-02-11 01:17:43,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:43,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534487641] [2022-02-11 01:17:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:44,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:44,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534487641] [2022-02-11 01:17:44,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534487641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:44,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576334602] [2022-02-11 01:17:44,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:17:44,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:44,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:44,212 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:44,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 01:17:44,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:17:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:17:44,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:44,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:44,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2022-02-11 01:17:44,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:44,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2022-02-11 01:17:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:44,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:44,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2022-02-11 01:17:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:44,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:45,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:45,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:45,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:17:45,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:45,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:17:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:45,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:45,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:17:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:46,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:46,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:46,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:17:46,385 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:17:46,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:17:46,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:46,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:46,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:46,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:17:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:46,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576334602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:46,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:46,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2022-02-11 01:17:46,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657863707] [2022-02-11 01:17:46,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:46,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:17:46,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:17:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:17:46,827 INFO L87 Difference]: Start difference. First operand 4765 states and 16414 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:53,882 INFO L93 Difference]: Finished difference Result 9074 states and 28716 transitions. [2022-02-11 01:17:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-11 01:17:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:53,902 INFO L225 Difference]: With dead ends: 9074 [2022-02-11 01:17:53,903 INFO L226 Difference]: Without dead ends: 8918 [2022-02-11 01:17:53,904 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3706 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1685, Invalid=10525, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:17:53,905 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 540 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:53,905 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 619 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:17:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2022-02-11 01:17:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 4772. [2022-02-11 01:17:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 3.446028086355062) internal successors, (16441), 4771 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 16441 transitions. [2022-02-11 01:17:54,032 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 16441 transitions. Word has length 30 [2022-02-11 01:17:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:54,033 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 16441 transitions. [2022-02-11 01:17:54,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 16441 transitions. [2022-02-11 01:17:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:54,040 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:54,040 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:54,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:54,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:54,251 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:54,252 INFO L85 PathProgramCache]: Analyzing trace with hash 791616355, now seen corresponding path program 24 times [2022-02-11 01:17:54,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:54,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930966489] [2022-02-11 01:17:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:54,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:54,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:54,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930966489] [2022-02-11 01:17:54,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930966489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:54,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65366597] [2022-02-11 01:17:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:17:54,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:54,726 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:54,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 01:17:54,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:17:54,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:17:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:55,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:55,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:55,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-02-11 01:17:55,120 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:17:55,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 64 [2022-02-11 01:17:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:55,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:55,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:17:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:55,687 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:17:55,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:17:55,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:55,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:17:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:55,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:55,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:17:58,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:58,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:17:58,827 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:17:58,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:17:58,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:58,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:17:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:59,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65366597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:59,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:59,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:17:59,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853643751] [2022-02-11 01:17:59,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:59,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:17:59,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:17:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:17:59,197 INFO L87 Difference]: Start difference. First operand 4772 states and 16441 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:04,856 INFO L93 Difference]: Finished difference Result 9686 states and 31179 transitions. [2022-02-11 01:18:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:18:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2022-02-11 01:18:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:04,879 INFO L225 Difference]: With dead ends: 9686 [2022-02-11 01:18:04,879 INFO L226 Difference]: Without dead ends: 9568 [2022-02-11 01:18:04,880 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1210, Invalid=9296, Unknown=0, NotChecked=0, Total=10506 [2022-02-11 01:18:04,880 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 559 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:04,881 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 580 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3024 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:18:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2022-02-11 01:18:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 4803. [2022-02-11 01:18:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.4448146605581007) internal successors, (16542), 4802 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16542 transitions. [2022-02-11 01:18:05,027 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16542 transitions. Word has length 30 [2022-02-11 01:18:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:05,027 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16542 transitions. [2022-02-11 01:18:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16542 transitions. [2022-02-11 01:18:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:05,036 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:05,036 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:05,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:05,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:05,241 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash 784192023, now seen corresponding path program 25 times [2022-02-11 01:18:05,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:05,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775230642] [2022-02-11 01:18:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:05,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:05,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775230642] [2022-02-11 01:18:05,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775230642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391989552] [2022-02-11 01:18:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:18:05,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:05,812 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:05,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 01:18:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:18:05,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:18:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:06,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-11 01:18:06,229 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:18:06,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-02-11 01:18:06,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:18:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:06,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:06,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:06,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:06,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:18:06,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:06,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:18:06,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:06,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:06,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:18:09,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:09,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:09,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:18:09,230 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:18:09,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:18:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:09,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:09,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:09,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:18:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:09,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391989552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:09,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:09,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-02-11 01:18:09,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451024959] [2022-02-11 01:18:09,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:09,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:18:09,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:18:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:18:09,967 INFO L87 Difference]: Start difference. First operand 4803 states and 16542 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:16,507 INFO L93 Difference]: Finished difference Result 10397 states and 31892 transitions. [2022-02-11 01:18:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 01:18:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:18:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:16,533 INFO L225 Difference]: With dead ends: 10397 [2022-02-11 01:18:16,533 INFO L226 Difference]: Without dead ends: 10367 [2022-02-11 01:18:16,534 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2285, Invalid=8635, Unknown=0, NotChecked=0, Total=10920 [2022-02-11 01:18:16,535 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 832 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:16,535 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 431 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1919 Invalid, 0 Unknown, 234 Unchecked, 1.9s Time] [2022-02-11 01:18:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10367 states. [2022-02-11 01:18:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10367 to 4820. [2022-02-11 01:18:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4819 states have (on average 3.449678356505499) internal successors, (16624), 4819 states have internal predecessors, (16624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 16624 transitions. [2022-02-11 01:18:16,688 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 16624 transitions. Word has length 30 [2022-02-11 01:18:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:16,688 INFO L470 AbstractCegarLoop]: Abstraction has 4820 states and 16624 transitions. [2022-02-11 01:18:16,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 16624 transitions. [2022-02-11 01:18:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:16,698 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:16,698 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:16,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:16,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 01:18:16,916 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash -909401901, now seen corresponding path program 26 times [2022-02-11 01:18:16,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:16,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605393741] [2022-02-11 01:18:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:16,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:17,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:17,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605393741] [2022-02-11 01:18:17,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605393741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:17,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941708170] [2022-02-11 01:18:17,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:18:17,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:17,305 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:17,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 01:18:17,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:18:17,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:18:17,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:18:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:18:17,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:17,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-02-11 01:18:17,663 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:18:17,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 69 [2022-02-11 01:18:17,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:18:17,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:17,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:18:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:17,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:18,050 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:18:18,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:18:18,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:18,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:18:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:18,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:18,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:18:20,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:20,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:20,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:20,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:18:20,171 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:18:20,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:18:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:20,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:20,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:20,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:18:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:20,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941708170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:20,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:20,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:18:20,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237335799] [2022-02-11 01:18:20,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:20,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:18:20,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:18:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:18:20,711 INFO L87 Difference]: Start difference. First operand 4820 states and 16624 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:29,496 INFO L93 Difference]: Finished difference Result 10094 states and 32208 transitions. [2022-02-11 01:18:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-11 01:18:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2022-02-11 01:18:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:29,527 INFO L225 Difference]: With dead ends: 10094 [2022-02-11 01:18:29,527 INFO L226 Difference]: Without dead ends: 10035 [2022-02-11 01:18:29,528 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2135, Invalid=15421, Unknown=0, NotChecked=0, Total=17556 [2022-02-11 01:18:29,533 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 718 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:29,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 754 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 01:18:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2022-02-11 01:18:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 4803. [2022-02-11 01:18:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.445855893377759) internal successors, (16547), 4802 states have internal predecessors, (16547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16547 transitions. [2022-02-11 01:18:29,679 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16547 transitions. Word has length 30 [2022-02-11 01:18:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:29,679 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16547 transitions. [2022-02-11 01:18:29,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16547 transitions. [2022-02-11 01:18:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:29,687 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:29,687 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:29,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 01:18:29,904 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -980079081, now seen corresponding path program 27 times [2022-02-11 01:18:29,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:29,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079755132] [2022-02-11 01:18:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:30,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:30,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079755132] [2022-02-11 01:18:30,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079755132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:30,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973723675] [2022-02-11 01:18:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:18:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:30,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:30,286 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:30,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 01:18:30,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:18:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:18:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:18:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:37,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:37,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2022-02-11 01:18:37,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:37,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-02-11 01:18:37,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:37,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-02-11 01:18:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:47,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:47,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-02-11 01:18:48,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:48,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-02-11 01:18:48,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:48,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-02-11 01:18:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:57,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973723675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:57,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:57,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-11 01:18:57,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507122891] [2022-02-11 01:18:57,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:57,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:18:57,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:18:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=907, Unknown=12, NotChecked=0, Total=1056 [2022-02-11 01:18:57,397 INFO L87 Difference]: Start difference. First operand 4803 states and 16547 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:41,041 INFO L93 Difference]: Finished difference Result 7463 states and 24999 transitions. [2022-02-11 01:19:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:19:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 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 30 [2022-02-11 01:19:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:41,056 INFO L225 Difference]: With dead ends: 7463 [2022-02-11 01:19:41,056 INFO L226 Difference]: Without dead ends: 7456 [2022-02-11 01:19:41,056 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=596, Invalid=3545, Unknown=19, NotChecked=0, Total=4160 [2022-02-11 01:19:41,057 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 325 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:41,057 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 402 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1359 Invalid, 0 Unknown, 739 Unchecked, 0.9s Time] [2022-02-11 01:19:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-02-11 01:19:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 4807. [2022-02-11 01:19:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4807 states, 4806 states have (on average 3.4454848106533498) internal successors, (16559), 4806 states have internal predecessors, (16559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 16559 transitions. [2022-02-11 01:19:41,159 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 16559 transitions. Word has length 30 [2022-02-11 01:19:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:41,159 INFO L470 AbstractCegarLoop]: Abstraction has 4807 states and 16559 transitions. [2022-02-11 01:19:41,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 16559 transitions. [2022-02-11 01:19:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:41,166 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:41,166 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:41,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:41,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:41,375 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1990099571, now seen corresponding path program 28 times [2022-02-11 01:19:41,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:41,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169853793] [2022-02-11 01:19:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:41,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:41,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:41,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169853793] [2022-02-11 01:19:41,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169853793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:41,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374860832] [2022-02-11 01:19:41,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:19:41,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:41,680 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:41,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 01:19:41,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:19:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:19:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:42,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:42,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-11 01:19:42,104 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:19:42,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 34 [2022-02-11 01:19:42,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:19:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:42,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:42,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:42,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:19:42,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:42,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:19:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:42,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:42,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:19:44,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:44,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:44,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:44,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:19:44,138 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:19:44,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:19:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:44,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:44,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:44,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:19:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:44,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374860832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:44,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:44,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:19:44,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119830600] [2022-02-11 01:19:44,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:44,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:19:44,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:44,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:19:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:19:44,497 INFO L87 Difference]: Start difference. First operand 4807 states and 16559 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:47,604 INFO L93 Difference]: Finished difference Result 7801 states and 25123 transitions. [2022-02-11 01:19:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:19:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:19:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:47,627 INFO L225 Difference]: With dead ends: 7801 [2022-02-11 01:19:47,627 INFO L226 Difference]: Without dead ends: 7771 [2022-02-11 01:19:47,628 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=855, Invalid=4997, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 01:19:47,628 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 413 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:47,628 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 297 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:19:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2022-02-11 01:19:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 4813. [2022-02-11 01:19:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4457605985037407) internal successors, (16581), 4812 states have internal predecessors, (16581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16581 transitions. [2022-02-11 01:19:47,775 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16581 transitions. Word has length 30 [2022-02-11 01:19:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:47,775 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16581 transitions. [2022-02-11 01:19:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16581 transitions. [2022-02-11 01:19:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:47,785 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:47,785 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:47,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 01:19:47,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 01:19:47,986 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2065974609, now seen corresponding path program 29 times [2022-02-11 01:19:47,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:47,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882930628] [2022-02-11 01:19:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:48,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:48,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882930628] [2022-02-11 01:19:48,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882930628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:48,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42541153] [2022-02-11 01:19:48,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:19:48,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:48,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:48,321 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:48,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 01:19:48,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:19:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:48,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:19:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:48,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:48,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-11 01:19:48,751 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:19:48,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-02-11 01:19:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:48,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:19:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:49,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:49,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:19:49,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:49,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:19:49,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:49,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:19:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:49,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:19:49,881 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:19:49,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:19:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:49,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:49,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:19:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:50,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42541153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:50,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:50,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-02-11 01:19:50,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002879444] [2022-02-11 01:19:50,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:19:50,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:19:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:19:50,387 INFO L87 Difference]: Start difference. First operand 4813 states and 16581 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:59,691 INFO L93 Difference]: Finished difference Result 8556 states and 27077 transitions. [2022-02-11 01:19:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 01:19:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 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 30 [2022-02-11 01:19:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:59,709 INFO L225 Difference]: With dead ends: 8556 [2022-02-11 01:19:59,709 INFO L226 Difference]: Without dead ends: 8526 [2022-02-11 01:19:59,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1729, Invalid=14273, Unknown=0, NotChecked=0, Total=16002 [2022-02-11 01:19:59,711 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4108 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 4108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:59,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 843 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 4108 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:19:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2022-02-11 01:19:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 4824. [2022-02-11 01:19:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 3.4474393530997305) internal successors, (16627), 4823 states have internal predecessors, (16627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 16627 transitions. [2022-02-11 01:19:59,823 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 16627 transitions. Word has length 30 [2022-02-11 01:19:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:59,823 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 16627 transitions. [2022-02-11 01:19:59,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 16627 transitions. [2022-02-11 01:19:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:59,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:59,830 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:59,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:00,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 01:20:00,046 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash 73995961, now seen corresponding path program 30 times [2022-02-11 01:20:00,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:00,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840538736] [2022-02-11 01:20:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:00,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:00,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840538736] [2022-02-11 01:20:00,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840538736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:00,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173282447] [2022-02-11 01:20:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:00,368 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:20:00,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:20:00,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:20:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:20:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:00,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:00,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-02-11 01:20:00,773 INFO L353 Elim1Store]: treesize reduction 47, result has 55.2 percent of original size [2022-02-11 01:20:00,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 78 [2022-02-11 01:20:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:00,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:00,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:00,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-02-11 01:20:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:00,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:01,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:01,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:01,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:20:01,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:01,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:20:01,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:01,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:01,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:20:02,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:02,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:02,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:20:02,863 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:20:02,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:20:02,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:02,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:02,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:20:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:03,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173282447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:03,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:03,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:20:03,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176690184] [2022-02-11 01:20:03,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:03,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:20:03,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:20:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:20:03,355 INFO L87 Difference]: Start difference. First operand 4824 states and 16627 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:09,821 INFO L93 Difference]: Finished difference Result 9374 states and 29675 transitions. [2022-02-11 01:20:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 01:20:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:20:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:09,842 INFO L225 Difference]: With dead ends: 9374 [2022-02-11 01:20:09,842 INFO L226 Difference]: Without dead ends: 9284 [2022-02-11 01:20:09,843 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4310 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1881, Invalid=10329, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:20:09,844 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 579 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:09,844 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 544 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:20:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2022-02-11 01:20:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 4828. [2022-02-11 01:20:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 3.4481044126786826) internal successors, (16644), 4827 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 16644 transitions. [2022-02-11 01:20:09,954 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 16644 transitions. Word has length 30 [2022-02-11 01:20:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:09,954 INFO L470 AbstractCegarLoop]: Abstraction has 4828 states and 16644 transitions. [2022-02-11 01:20:09,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 16644 transitions. [2022-02-11 01:20:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:20:09,961 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:09,961 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:20:09,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:10,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 01:20:10,162 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1141165369, now seen corresponding path program 31 times [2022-02-11 01:20:10,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:10,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738461804] [2022-02-11 01:20:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:10,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:10,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738461804] [2022-02-11 01:20:10,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738461804] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:10,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755314117] [2022-02-11 01:20:10,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:10,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:10,449 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:20:10,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:20:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:20:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:10,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:10,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:10,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-11 01:20:10,866 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:20:10,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-02-11 01:20:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:10,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:20:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:10,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:11,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:11,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:11,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:20:11,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:11,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:20:11,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:11,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:11,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:20:14,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:14,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:20:14,200 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:20:14,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:20:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:14,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:20:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:14,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755314117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:14,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:14,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:20:14,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114447121] [2022-02-11 01:20:14,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:14,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:20:14,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:20:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:20:14,643 INFO L87 Difference]: Start difference. First operand 4828 states and 16644 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:19,979 INFO L93 Difference]: Finished difference Result 8300 states and 26710 transitions. [2022-02-11 01:20:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:20:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:20:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:19,999 INFO L225 Difference]: With dead ends: 8300 [2022-02-11 01:20:19,999 INFO L226 Difference]: Without dead ends: 8270 [2022-02-11 01:20:20,000 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1231, Invalid=6779, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 01:20:20,000 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 452 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:20,000 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 468 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:20:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2022-02-11 01:20:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 4813. [2022-02-11 01:20:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4463840399002494) internal successors, (16584), 4812 states have internal predecessors, (16584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16584 transitions. [2022-02-11 01:20:20,119 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16584 transitions. Word has length 30 [2022-02-11 01:20:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16584 transitions. [2022-02-11 01:20:20,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16584 transitions. [2022-02-11 01:20:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:20:20,128 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:20,128 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:20:20,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-11 01:20:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-02-11 01:20:20,339 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash -769410283, now seen corresponding path program 32 times [2022-02-11 01:20:20,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:20,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574725864] [2022-02-11 01:20:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:20,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:20,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574725864] [2022-02-11 01:20:20,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574725864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:20,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134453466] [2022-02-11 01:20:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:20,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:20,736 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:20:20,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:20:20,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:20,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:20:20,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:21,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:21,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:21,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 01:20:21,210 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:20:21,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-02-11 01:20:21,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:20:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:21,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:21,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:21,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:20:21,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:21,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:20:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:21,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:21,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:20:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:24,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:24,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:20:24,632 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:20:24,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:20:24,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:24,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:24,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:24,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:20:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:25,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134453466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:25,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:25,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:20:25,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135059024] [2022-02-11 01:20:25,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:25,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:20:25,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:20:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:20:25,088 INFO L87 Difference]: Start difference. First operand 4813 states and 16584 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:29,277 INFO L93 Difference]: Finished difference Result 8554 states and 27486 transitions. [2022-02-11 01:20:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 01:20:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:20:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:29,297 INFO L225 Difference]: With dead ends: 8554 [2022-02-11 01:20:29,298 INFO L226 Difference]: Without dead ends: 8503 [2022-02-11 01:20:29,298 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1274, Invalid=7656, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 01:20:29,299 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 514 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:29,299 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 365 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:20:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-02-11 01:20:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 4860. [2022-02-11 01:20:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 3.448857789668656) internal successors, (16758), 4859 states have internal predecessors, (16758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 16758 transitions. [2022-02-11 01:20:29,442 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 16758 transitions. Word has length 30 [2022-02-11 01:20:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:29,443 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 16758 transitions. [2022-02-11 01:20:29,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 16758 transitions. [2022-02-11 01:20:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:20:29,452 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:29,453 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:20:29,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 01:20:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:29,656 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1370560287, now seen corresponding path program 33 times [2022-02-11 01:20:29,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:29,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501431483] [2022-02-11 01:20:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:29,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:29,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501431483] [2022-02-11 01:20:29,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501431483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:29,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569901315] [2022-02-11 01:20:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:29,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:29,933 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:20:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 01:20:29,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:20:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:20:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:30,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:30,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2022-02-11 01:20:30,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:30,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-02-11 01:20:30,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:30,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-02-11 01:20:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:32,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:44,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:44,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-02-11 01:20:45,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:45,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-02-11 01:20:45,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:45,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-02-11 01:20:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:49,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569901315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:49,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:49,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-11 01:20:49,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623532259] [2022-02-11 01:20:49,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:20:49,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:20:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=890, Unknown=7, NotChecked=0, Total=1056 [2022-02-11 01:20:49,909 INFO L87 Difference]: Start difference. First operand 4860 states and 16758 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:58,604 INFO L93 Difference]: Finished difference Result 9120 states and 30249 transitions. [2022-02-11 01:20:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:20:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 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 30 [2022-02-11 01:20:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:58,621 INFO L225 Difference]: With dead ends: 9120 [2022-02-11 01:20:58,622 INFO L226 Difference]: Without dead ends: 9095 [2022-02-11 01:20:58,622 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=1838, Invalid=7660, Unknown=8, NotChecked=0, Total=9506 [2022-02-11 01:20:58,623 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 776 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:58,623 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 422 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1819 Invalid, 0 Unknown, 776 Unchecked, 1.2s Time] [2022-02-11 01:20:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9095 states. [2022-02-11 01:20:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9095 to 4905. [2022-02-11 01:20:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.4494290375203915) internal successors, (16916), 4904 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 16916 transitions. [2022-02-11 01:20:58,727 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 16916 transitions. Word has length 30 [2022-02-11 01:20:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 16916 transitions. [2022-02-11 01:20:58,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 16916 transitions. [2022-02-11 01:20:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:20:58,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:58,734 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:20:58,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:58,935 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 402668975, now seen corresponding path program 34 times [2022-02-11 01:20:58,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:58,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019054808] [2022-02-11 01:20:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:59,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:59,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019054808] [2022-02-11 01:20:59,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019054808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:59,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000995994] [2022-02-11 01:20:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:59,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:59,341 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:20:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 01:20:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:20:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:59,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:59,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-11 01:20:59,726 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:20:59,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-02-11 01:20:59,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:20:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:59,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:00,013 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:21:00,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:21:00,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:21:00,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:00,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:00,565 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:00,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:00,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:00,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000995994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:00,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:00,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:21:00,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327261917] [2022-02-11 01:21:00,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:00,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:21:00,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:21:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:21:00,859 INFO L87 Difference]: Start difference. First operand 4905 states and 16916 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:05,709 INFO L93 Difference]: Finished difference Result 8809 states and 28697 transitions. [2022-02-11 01:21:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:21:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:21:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:05,730 INFO L225 Difference]: With dead ends: 8809 [2022-02-11 01:21:05,730 INFO L226 Difference]: Without dead ends: 8769 [2022-02-11 01:21:05,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1111, Invalid=7819, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 01:21:05,731 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 469 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:05,731 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 454 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 01:21:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8769 states. [2022-02-11 01:21:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8769 to 4890. [2022-02-11 01:21:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-02-11 01:21:05,868 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-02-11 01:21:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-02-11 01:21:05,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-02-11 01:21:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:05,877 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:05,877 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:05,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 01:21:06,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:06,078 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -3113723, now seen corresponding path program 35 times [2022-02-11 01:21:06,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:06,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235971185] [2022-02-11 01:21:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:06,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:06,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235971185] [2022-02-11 01:21:06,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235971185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:06,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759244903] [2022-02-11 01:21:06,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:21:06,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:06,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:06,448 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:06,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 01:21:06,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:21:06,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:21:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:06,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:06,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:06,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:21:06,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:06,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-02-11 01:21:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:06,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:06,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:21:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:06,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:07,043 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:21:07,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:21:07,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:21:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:07,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:07,845 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:07,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:08,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759244903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:08,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:08,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-02-11 01:21:08,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889806207] [2022-02-11 01:21:08,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:08,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:21:08,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:21:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:21:08,155 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:13,657 INFO L93 Difference]: Finished difference Result 10206 states and 32855 transitions. [2022-02-11 01:21:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:21:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2022-02-11 01:21:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:13,680 INFO L225 Difference]: With dead ends: 10206 [2022-02-11 01:21:13,681 INFO L226 Difference]: Without dead ends: 10088 [2022-02-11 01:21:13,682 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1509, Invalid=11601, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 01:21:13,682 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 534 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:13,682 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 700 Invalid, 4223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:21:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2022-02-11 01:21:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 4890. [2022-02-11 01:21:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-02-11 01:21:13,860 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-02-11 01:21:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:13,860 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-02-11 01:21:13,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-02-11 01:21:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:13,869 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:13,869 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:13,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-11 01:21:14,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-11 01:21:14,073 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash 363581355, now seen corresponding path program 36 times [2022-02-11 01:21:14,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:14,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915740027] [2022-02-11 01:21:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:14,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:14,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915740027] [2022-02-11 01:21:14,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915740027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:14,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763300615] [2022-02-11 01:21:14,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:21:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:14,388 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:14,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 01:21:14,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:21:14,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:14,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-11 01:21:14,773 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:21:14,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-02-11 01:21:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:14,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:21:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:15,094 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:21:15,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:21:15,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:15,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:21:15,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:15,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:15,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:16,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:16,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:16,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:16,827 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:16,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:16,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:16,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:16,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:17,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763300615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:17,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:17,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 01:21:17,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942025607] [2022-02-11 01:21:17,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:17,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:21:17,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:21:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:21:17,584 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:21,639 INFO L93 Difference]: Finished difference Result 8571 states and 27884 transitions. [2022-02-11 01:21:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 01:21:21,639 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:21:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:21,659 INFO L225 Difference]: With dead ends: 8571 [2022-02-11 01:21:21,660 INFO L226 Difference]: Without dead ends: 8537 [2022-02-11 01:21:21,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=917, Invalid=7455, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 01:21:21,661 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 384 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:21,661 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 448 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:21:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-02-11 01:21:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 5050. [2022-02-11 01:21:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 3.4476133887898595) internal successors, (17407), 5049 states have internal predecessors, (17407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 17407 transitions. [2022-02-11 01:21:21,787 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 17407 transitions. Word has length 30 [2022-02-11 01:21:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:21,788 INFO L470 AbstractCegarLoop]: Abstraction has 5050 states and 17407 transitions. [2022-02-11 01:21:21,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 17407 transitions. [2022-02-11 01:21:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:21,796 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:21,796 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:21,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 01:21:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:22,012 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash -720955961, now seen corresponding path program 37 times [2022-02-11 01:21:22,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:22,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711033562] [2022-02-11 01:21:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:22,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:22,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711033562] [2022-02-11 01:21:22,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711033562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:22,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419933773] [2022-02-11 01:21:22,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:21:22,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:22,358 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:22,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 01:21:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:21:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:22,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:22,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-11 01:21:22,662 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:21:22,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-02-11 01:21:22,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:21:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:22,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:22,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:22,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:21:22,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:22,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:21:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:22,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:22,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:23,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:23,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:23,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:23,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:23,800 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:23,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:23,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:23,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:23,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:24,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419933773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:24,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:24,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:21:24,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691617633] [2022-02-11 01:21:24,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:24,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:21:24,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:21:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:21:24,332 INFO L87 Difference]: Start difference. First operand 5050 states and 17407 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:30,117 INFO L93 Difference]: Finished difference Result 9090 states and 29140 transitions. [2022-02-11 01:21:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:21:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:21:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:30,139 INFO L225 Difference]: With dead ends: 9090 [2022-02-11 01:21:30,140 INFO L226 Difference]: Without dead ends: 9033 [2022-02-11 01:21:30,141 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1717, Invalid=10493, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:21:30,142 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 488 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:30,143 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 399 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 01:21:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2022-02-11 01:21:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 5132. [2022-02-11 01:21:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 3.4433833560709415) internal successors, (17668), 5131 states have internal predecessors, (17668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 17668 transitions. [2022-02-11 01:21:30,272 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 17668 transitions. Word has length 30 [2022-02-11 01:21:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:30,272 INFO L470 AbstractCegarLoop]: Abstraction has 5132 states and 17668 transitions. [2022-02-11 01:21:30,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 17668 transitions. [2022-02-11 01:21:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:30,280 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:30,280 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:30,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 01:21:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:30,497 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 768780149, now seen corresponding path program 38 times [2022-02-11 01:21:30,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:30,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911481593] [2022-02-11 01:21:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:30,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:30,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911481593] [2022-02-11 01:21:30,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911481593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:30,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539457290] [2022-02-11 01:21:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:21:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:30,825 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:30,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 01:21:30,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:21:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:31,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-02-11 01:21:31,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 68 [2022-02-11 01:21:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:31,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2022-02-11 01:21:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:31,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:31,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:31,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:21:31,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:21:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:31,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:32,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:32,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:32,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:32,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:32,724 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:32,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:32,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:32,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:33,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539457290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:33,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:33,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:21:33,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401175281] [2022-02-11 01:21:33,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:21:33,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:21:33,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:21:33,221 INFO L87 Difference]: Start difference. First operand 5132 states and 17668 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:41,110 INFO L93 Difference]: Finished difference Result 10200 states and 32429 transitions. [2022-02-11 01:21:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-11 01:21:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:21:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:41,133 INFO L225 Difference]: With dead ends: 10200 [2022-02-11 01:21:41,133 INFO L226 Difference]: Without dead ends: 10080 [2022-02-11 01:21:41,135 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2582, Invalid=16324, Unknown=0, NotChecked=0, Total=18906 [2022-02-11 01:21:41,135 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 574 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:41,135 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 554 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:21:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10080 states. [2022-02-11 01:21:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10080 to 5115. [2022-02-11 01:21:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 5114 states have (on average 3.4419241298396557) internal successors, (17602), 5114 states have internal predecessors, (17602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 17602 transitions. [2022-02-11 01:21:41,280 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 17602 transitions. Word has length 30 [2022-02-11 01:21:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:41,281 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 17602 transitions. [2022-02-11 01:21:41,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 17602 transitions. [2022-02-11 01:21:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:41,289 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:41,289 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 01:21:41,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-11 01:21:41,506 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1129877915, now seen corresponding path program 39 times [2022-02-11 01:21:41,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:41,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910947441] [2022-02-11 01:21:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:41,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:41,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910947441] [2022-02-11 01:21:41,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910947441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:41,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604094859] [2022-02-11 01:21:41,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:21:41,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:41,875 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 01:21:41,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:21:41,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:42,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:42,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 56 [2022-02-11 01:21:42,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:42,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-02-11 01:21:42,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:42,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:21:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:42,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:42,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:42,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:42,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:42,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:21:43,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:43,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:21:43,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:43,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-02-11 01:21:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 01:21:43,452 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-02-11 01:21:43,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2022-02-11 01:21:43,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:21:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:43,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604094859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:43,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:43,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-02-11 01:21:43,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877555379] [2022-02-11 01:21:43,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:43,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:21:43,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:21:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:21:43,605 INFO L87 Difference]: Start difference. First operand 5115 states and 17602 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:49,007 INFO L93 Difference]: Finished difference Result 9935 states and 32181 transitions. [2022-02-11 01:21:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:21:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 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 30 [2022-02-11 01:21:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:49,034 INFO L225 Difference]: With dead ends: 9935 [2022-02-11 01:21:49,034 INFO L226 Difference]: Without dead ends: 9758 [2022-02-11 01:21:49,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1813, Invalid=9317, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:21:49,035 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 817 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:49,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 459 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:21:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2022-02-11 01:21:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 5189. [2022-02-11 01:21:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 3.4335003855050115) internal successors, (17813), 5188 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 17813 transitions. [2022-02-11 01:21:49,190 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 17813 transitions. Word has length 30 [2022-02-11 01:21:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:49,190 INFO L470 AbstractCegarLoop]: Abstraction has 5189 states and 17813 transitions. [2022-02-11 01:21:49,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 17813 transitions. [2022-02-11 01:21:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:21:49,199 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:49,199 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:21:49,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 01:21:49,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 01:21:49,406 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash 36149297, now seen corresponding path program 40 times [2022-02-11 01:21:49,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:49,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644710512] [2022-02-11 01:21:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:49,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:49,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:49,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644710512] [2022-02-11 01:21:49,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644710512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:49,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439002218] [2022-02-11 01:21:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:21:49,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:49,759 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:21:49,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 01:21:49,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:21:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:50,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:50,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 01:21:50,027 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:21:50,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-02-11 01:21:50,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:21:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:50,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:50,334 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:21:50,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:21:50,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:50,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:21:50,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:50,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:50,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:52,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:21:53,001 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:53,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:21:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:53,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:53,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:53,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:21:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:21:53,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439002218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:53,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:53,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:21:53,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634947650] [2022-02-11 01:21:53,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:53,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:21:53,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:21:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:21:53,591 INFO L87 Difference]: Start difference. First operand 5189 states and 17813 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:00,682 INFO L93 Difference]: Finished difference Result 9589 states and 30938 transitions. [2022-02-11 01:22:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:22:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:22:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:00,709 INFO L225 Difference]: With dead ends: 9589 [2022-02-11 01:22:00,709 INFO L226 Difference]: Without dead ends: 9535 [2022-02-11 01:22:00,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4215 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1485, Invalid=11397, Unknown=0, NotChecked=0, Total=12882 [2022-02-11 01:22:00,711 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 500 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 3388 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:00,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 495 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3388 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:22:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2022-02-11 01:22:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 5243. [2022-02-11 01:22:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.4296070202212894) internal successors, (17978), 5242 states have internal predecessors, (17978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 17978 transitions. [2022-02-11 01:22:00,857 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 17978 transitions. Word has length 30 [2022-02-11 01:22:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:00,858 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 17978 transitions. [2022-02-11 01:22:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 17978 transitions. [2022-02-11 01:22:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:22:00,866 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:00,867 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:22:00,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-11 01:22:01,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:01,072 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 933428853, now seen corresponding path program 41 times [2022-02-11 01:22:01,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:01,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874455407] [2022-02-11 01:22:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:01,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:01,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874455407] [2022-02-11 01:22:01,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874455407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:01,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766087694] [2022-02-11 01:22:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:22:01,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:01,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:01,462 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:22:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 01:22:01,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:22:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:22:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:04,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-11 01:22:04,824 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:22:04,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-02-11 01:22:04,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:22:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:04,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:05,221 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:22:05,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:22:05,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:05,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:22:05,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:05,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:05,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:22:06,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:06,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:06,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:06,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:22:06,172 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:06,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2022-02-11 01:22:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:06,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:06,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:22:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:06,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766087694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:06,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:06,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-02-11 01:22:06,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870579681] [2022-02-11 01:22:06,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:06,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:22:06,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:22:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=921, Unknown=3, NotChecked=0, Total=1056 [2022-02-11 01:22:06,623 INFO L87 Difference]: Start difference. First operand 5243 states and 17978 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:14,630 INFO L93 Difference]: Finished difference Result 9413 states and 30541 transitions. [2022-02-11 01:22:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:22:14,630 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:22:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:14,651 INFO L225 Difference]: With dead ends: 9413 [2022-02-11 01:22:14,652 INFO L226 Difference]: Without dead ends: 9344 [2022-02-11 01:22:14,652 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1303, Invalid=9200, Unknown=3, NotChecked=0, Total=10506 [2022-02-11 01:22:14,652 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 423 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:14,653 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 477 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2484 Invalid, 0 Unknown, 289 Unchecked, 1.3s Time] [2022-02-11 01:22:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-02-11 01:22:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 5305. [2022-02-11 01:22:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5305 states, 5304 states have (on average 3.427413273001508) internal successors, (18179), 5304 states have internal predecessors, (18179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 18179 transitions. [2022-02-11 01:22:14,789 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 18179 transitions. Word has length 30 [2022-02-11 01:22:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:14,789 INFO L470 AbstractCegarLoop]: Abstraction has 5305 states and 18179 transitions. [2022-02-11 01:22:14,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 18179 transitions. [2022-02-11 01:22:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:22:14,801 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:14,801 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:22:14,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 01:22:15,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:15,018 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1657395211, now seen corresponding path program 42 times [2022-02-11 01:22:15,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:15,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345124000] [2022-02-11 01:22:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:15,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:15,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345124000] [2022-02-11 01:22:15,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345124000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:15,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960164685] [2022-02-11 01:22:15,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:22:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:15,323 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:22:15,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 01:22:15,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:22:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:22:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:15,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:15,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-02-11 01:22:15,609 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-02-11 01:22:15,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 66 [2022-02-11 01:22:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:15,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:15,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:22:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:15,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:16,124 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:22:16,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:22:16,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:16,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-02-11 01:22:16,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:16,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:16,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:22:17,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:17,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:22:17,997 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:17,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:22:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:18,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:18,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:22:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:18,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960164685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:18,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:18,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 01:22:18,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739698254] [2022-02-11 01:22:18,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:22:18,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:22:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:22:18,439 INFO L87 Difference]: Start difference. First operand 5305 states and 18179 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:21,396 INFO L93 Difference]: Finished difference Result 9104 states and 29726 transitions. [2022-02-11 01:22:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:22:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2022-02-11 01:22:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:21,417 INFO L225 Difference]: With dead ends: 9104 [2022-02-11 01:22:21,418 INFO L226 Difference]: Without dead ends: 9045 [2022-02-11 01:22:21,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=841, Invalid=5321, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 01:22:21,419 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 470 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:21,419 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 443 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:22:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2022-02-11 01:22:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 5313. [2022-02-11 01:22:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 3.426769578313253) internal successors, (18203), 5312 states have internal predecessors, (18203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 18203 transitions. [2022-02-11 01:22:21,555 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 18203 transitions. Word has length 30 [2022-02-11 01:22:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 18203 transitions. [2022-02-11 01:22:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 18203 transitions. [2022-02-11 01:22:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:22:21,564 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:21,564 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:22:21,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 01:22:21,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-11 01:22:21,777 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash 987303649, now seen corresponding path program 43 times [2022-02-11 01:22:21,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:21,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371465036] [2022-02-11 01:22:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:22,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:22,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371465036] [2022-02-11 01:22:22,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371465036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:22,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568577502] [2022-02-11 01:22:22,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:22:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:22,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:22,206 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:22:22,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 01:22:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:22,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:22:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:25,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:25,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-02-11 01:22:25,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-02-11 01:22:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:25,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:22:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:25,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:25,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:22:25,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:22:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:25,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:25,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:22:26,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:26,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:26,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-02-11 01:22:26,767 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:26,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2022-02-11 01:22:26,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:26,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:26,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:22:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:27,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568577502] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:27,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:27,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:22:27,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240984693] [2022-02-11 01:22:27,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:27,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:22:27,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:22:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=737, Unknown=2, NotChecked=0, Total=870 [2022-02-11 01:22:27,209 INFO L87 Difference]: Start difference. First operand 5313 states and 18203 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:35,445 INFO L93 Difference]: Finished difference Result 9470 states and 30254 transitions. [2022-02-11 01:22:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:22:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:22:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:35,463 INFO L225 Difference]: With dead ends: 9470 [2022-02-11 01:22:35,463 INFO L226 Difference]: Without dead ends: 9326 [2022-02-11 01:22:35,465 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1276, Invalid=6732, Unknown=2, NotChecked=0, Total=8010 [2022-02-11 01:22:35,465 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 436 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:35,465 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 403 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2033 Invalid, 0 Unknown, 159 Unchecked, 1.1s Time] [2022-02-11 01:22:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9326 states. [2022-02-11 01:22:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9326 to 5342. [2022-02-11 01:22:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 3.4263246583036886) internal successors, (18300), 5341 states have internal predecessors, (18300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 18300 transitions. [2022-02-11 01:22:35,625 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 18300 transitions. Word has length 30 [2022-02-11 01:22:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:35,625 INFO L470 AbstractCegarLoop]: Abstraction has 5342 states and 18300 transitions. [2022-02-11 01:22:35,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 18300 transitions. [2022-02-11 01:22:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:22:35,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:35,633 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:22:35,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 01:22:35,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:35,842 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1044008881, now seen corresponding path program 44 times [2022-02-11 01:22:35,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:35,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514994134] [2022-02-11 01:22:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:36,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:36,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514994134] [2022-02-11 01:22:36,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514994134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:36,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155129008] [2022-02-11 01:22:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:22:36,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:36,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:36,100 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:22:36,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 01:22:36,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:22:36,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:22:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:38,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:22:38,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-02-11 01:22:38,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:38,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:22:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:39,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:39,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:39,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-02-11 01:22:39,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:39,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-02-11 01:22:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:39,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:22:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:40,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:40,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:40,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-02-11 01:22:40,799 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:40,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-02-11 01:22:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:40,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:40,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:22:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:41,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155129008] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:41,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:41,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-02-11 01:22:41,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897364221] [2022-02-11 01:22:41,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:41,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:22:41,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:22:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=738, Unknown=2, NotChecked=0, Total=870 [2022-02-11 01:22:41,117 INFO L87 Difference]: Start difference. First operand 5342 states and 18300 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:44,643 INFO L93 Difference]: Finished difference Result 9904 states and 31520 transitions. [2022-02-11 01:22:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 01:22:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:22:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:44,662 INFO L225 Difference]: With dead ends: 9904 [2022-02-11 01:22:44,662 INFO L226 Difference]: Without dead ends: 9760 [2022-02-11 01:22:44,663 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1340, Invalid=7588, Unknown=2, NotChecked=0, Total=8930 [2022-02-11 01:22:44,663 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 492 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:44,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 483 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2132 Invalid, 0 Unknown, 614 Unchecked, 1.0s Time] [2022-02-11 01:22:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2022-02-11 01:22:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 5339. [2022-02-11 01:22:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5338 states have (on average 3.4263769201948295) internal successors, (18290), 5338 states have internal predecessors, (18290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 18290 transitions. [2022-02-11 01:22:44,780 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 18290 transitions. Word has length 30 [2022-02-11 01:22:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:44,780 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 18290 transitions. [2022-02-11 01:22:44,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 18290 transitions. [2022-02-11 01:22:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:22:44,788 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:44,788 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:22:44,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-11 01:22:44,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:44,996 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1597669409, now seen corresponding path program 45 times [2022-02-11 01:22:44,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:44,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719925209] [2022-02-11 01:22:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:45,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:45,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719925209] [2022-02-11 01:22:45,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719925209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:45,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120240687] [2022-02-11 01:22:45,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:22:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:45,339 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:22:45,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 01:22:45,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:22:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:22:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:45,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-02-11 01:22:45,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-02-11 01:22:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:45,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-02-11 01:22:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:48,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:48,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-02-11 01:22:48,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:48,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-02-11 01:22:48,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:48,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-02-11 01:22:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:22:53,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120240687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:53,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:53,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 01:22:53,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075457740] [2022-02-11 01:22:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:22:53,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:22:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:22:53,567 INFO L87 Difference]: Start difference. First operand 5339 states and 18290 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:24,853 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-02-11 01:23:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:23:24,855 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=657, Invalid=2765, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:23:24,855 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:23:24,855 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 41 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 560 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-02-11 01:23:24,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-02-11 01:23:24,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 01:23:25,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-11 01:23:25,059 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:193) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:785) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:64) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:417) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:308) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-02-11 01:23:25,063 INFO L158 Benchmark]: Toolchain (without parser) took 836049.95ms. Allocated memory was 183.5MB in the beginning and 675.3MB in the end (delta: 491.8MB). Free memory was 145.8MB in the beginning and 420.8MB in the end (delta: -275.0MB). Peak memory consumption was 217.7MB. Max. memory is 8.0GB. [2022-02-11 01:23:25,063 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 183.5MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:23:25,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.13ms. Allocated memory is still 183.5MB. Free memory was 145.8MB in the beginning and 144.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:23:25,064 INFO L158 Benchmark]: Boogie Preprocessor took 13.65ms. Allocated memory is still 183.5MB. Free memory was 144.2MB in the beginning and 143.3MB in the end (delta: 944.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:23:25,064 INFO L158 Benchmark]: RCFGBuilder took 227.10ms. Allocated memory is still 183.5MB. Free memory was 143.1MB in the beginning and 134.3MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:23:25,064 INFO L158 Benchmark]: TraceAbstraction took 835784.21ms. Allocated memory was 183.5MB in the beginning and 675.3MB in the end (delta: 491.8MB). Free memory was 133.8MB in the beginning and 420.8MB in the end (delta: -287.0MB). Peak memory consumption was 206.1MB. Max. memory is 8.0GB. [2022-02-11 01:23:25,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 183.5MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.13ms. Allocated memory is still 183.5MB. Free memory was 145.8MB in the beginning and 144.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.65ms. Allocated memory is still 183.5MB. Free memory was 144.2MB in the beginning and 143.3MB in the end (delta: 944.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 227.10ms. Allocated memory is still 183.5MB. Free memory was 143.1MB in the beginning and 134.3MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 835784.21ms. Allocated memory was 183.5MB in the beginning and 675.3MB in the end (delta: 491.8MB). Free memory was 133.8MB in the beginning and 420.8MB in the end (delta: -287.0MB). Peak memory consumption was 206.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...