/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:34:17,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:34:17,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:34:17,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:34:17,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:34:17,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:34:17,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:34:17,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:34:17,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:34:17,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:34:17,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:34:17,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:34:17,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:34:17,931 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:34:17,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:34:17,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:34:17,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:34:17,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:34:17,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:34:17,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:34:18,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:34:18,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:34:18,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:34:18,151 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:34:18,152 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:34:18,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2022-03-15 16:34:18,153 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2022-03-15 16:34:18,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:34:18,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:34:18,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:34:18,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:34:18,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:34:18,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,202 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:34:18,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:34:18,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:34:18,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:34:18,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:34:18,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:34:18,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:34:18,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:34:18,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:34:18,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/1) ... [2022-03-15 16:34:18,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:34:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:18,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:34:18,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:34:18,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:34:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:34:18,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:34:18,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:34:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:34:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:34:18,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:34:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:34:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:34:18,345 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:34:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:34:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:34:18,345 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:34:18,386 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:34:18,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:34:18,482 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:34:18,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:34:18,529 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:34:18,530 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:34:18 BoogieIcfgContainer [2022-03-15 16:34:18,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:34:18,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:34:18,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:34:18,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:34:18,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:34:18" (1/2) ... [2022-03-15 16:34:18,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245efa91 and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:34:18, skipping insertion in model container [2022-03-15 16:34:18,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:34:18" (2/2) ... [2022-03-15 16:34:18,574 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2022-03-15 16:34:18,577 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:34:18,577 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:34:18,577 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:34:18,577 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:34:18,638 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:34:18,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:34:18,677 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, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:34:18,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:34:18,684 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-03-15 16:34:18,743 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:34:18,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:18,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:18,767 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239154, now seen corresponding path program 1 times [2022-03-15 16:34:18,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:18,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627975872] [2022-03-15 16:34:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:18,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:18,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627975872] [2022-03-15 16:34:18,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627975872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:34:18,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:34:18,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:34:18,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556822828] [2022-03-15 16:34:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:34:18,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:34:18,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:34:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:18,935 INFO L87 Difference]: Start difference. First operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:18,988 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2022-03-15 16:34:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:34:18,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:34:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:18,999 INFO L225 Difference]: With dead ends: 393 [2022-03-15 16:34:18,999 INFO L226 Difference]: Without dead ends: 393 [2022-03-15 16:34:19,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:19,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:19,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:34:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-15 16:34:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-03-15 16:34:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2022-03-15 16:34:19,086 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2022-03-15 16:34:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:19,086 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2022-03-15 16:34:19,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2022-03-15 16:34:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:34:19,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:19,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:19,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:34:19,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash 492079791, now seen corresponding path program 1 times [2022-03-15 16:34:19,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:19,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174857228] [2022-03-15 16:34:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:19,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:19,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:19,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174857228] [2022-03-15 16:34:19,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174857228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:34:19,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:34:19,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:34:19,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788730244] [2022-03-15 16:34:19,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:34:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:34:19,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:34:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:19,113 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-15 16:34:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:19,136 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2022-03-15 16:34:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:34:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 [2022-03-15 16:34:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:19,139 INFO L225 Difference]: With dead ends: 442 [2022-03-15 16:34:19,139 INFO L226 Difference]: Without dead ends: 442 [2022-03-15 16:34:19,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:19,141 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:19,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:34:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-15 16:34:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-03-15 16:34:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2022-03-15 16:34:19,158 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2022-03-15 16:34:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:19,158 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2022-03-15 16:34:19,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-15 16:34:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2022-03-15 16:34:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:19,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:19,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:19,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:34:19,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 806798595, now seen corresponding path program 1 times [2022-03-15 16:34:19,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:19,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871408027] [2022-03-15 16:34:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:34:19,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:19,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871408027] [2022-03-15 16:34:19,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871408027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:34:19,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:34:19,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:34:19,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470467750] [2022-03-15 16:34:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:34:19,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:34:19,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:34:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:19,203 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:19,227 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2022-03-15 16:34:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:34:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-03-15 16:34:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:19,230 INFO L225 Difference]: With dead ends: 880 [2022-03-15 16:34:19,230 INFO L226 Difference]: Without dead ends: 588 [2022-03-15 16:34:19,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:19,231 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:19,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:34:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-15 16:34:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2022-03-15 16:34:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2022-03-15 16:34:19,249 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2022-03-15 16:34:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:19,249 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2022-03-15 16:34:19,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2022-03-15 16:34:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:19,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:19,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:19,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:34:19,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1435505509, now seen corresponding path program 1 times [2022-03-15 16:34:19,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:19,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903703370] [2022-03-15 16:34:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:19,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903703370] [2022-03-15 16:34:19,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903703370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216112162] [2022-03-15 16:34:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:19,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:19,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:34:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:34:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:34:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:19,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-15 16:34:19,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:34:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:34:19,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216112162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:19,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:19,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-03-15 16:34:19,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028899837] [2022-03-15 16:34:19,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:34:19,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:34:19,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:34:19,728 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-03-15 16:34:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:19,990 INFO L93 Difference]: Finished difference Result 1649 states and 4903 transitions. [2022-03-15 16:34:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:34:19,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 28 [2022-03-15 16:34:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:19,996 INFO L225 Difference]: With dead ends: 1649 [2022-03-15 16:34:19,996 INFO L226 Difference]: Without dead ends: 1033 [2022-03-15 16:34:19,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:34:19,997 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:19,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 185 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-15 16:34:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 773. [2022-03-15 16:34:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.966321243523316) internal successors, (2290), 772 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2290 transitions. [2022-03-15 16:34:20,025 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2290 transitions. Word has length 28 [2022-03-15 16:34:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:20,025 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2290 transitions. [2022-03-15 16:34:20,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2022-03-15 16:34:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2290 transitions. [2022-03-15 16:34:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:20,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:20,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:20,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:34:20,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:20,228 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:20,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1406640581, now seen corresponding path program 2 times [2022-03-15 16:34:20,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:20,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008313416] [2022-03-15 16:34:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:20,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:20,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:20,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008313416] [2022-03-15 16:34:20,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008313416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:34:20,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:34:20,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:34:20,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067960639] [2022-03-15 16:34:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:34:20,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:34:20,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:34:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:20,254 INFO L87 Difference]: Start difference. First operand 773 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:20,271 INFO L93 Difference]: Finished difference Result 616 states and 1811 transitions. [2022-03-15 16:34:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:34:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-03-15 16:34:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:20,274 INFO L225 Difference]: With dead ends: 616 [2022-03-15 16:34:20,275 INFO L226 Difference]: Without dead ends: 616 [2022-03-15 16:34:20,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:34:20,275 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:20,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:34:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-15 16:34:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-03-15 16:34:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.9447154471544716) internal successors, (1811), 615 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1811 transitions. [2022-03-15 16:34:20,287 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1811 transitions. Word has length 28 [2022-03-15 16:34:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:20,287 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1811 transitions. [2022-03-15 16:34:20,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1811 transitions. [2022-03-15 16:34:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:34:20,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:20,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:20,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:34:20,289 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1436964612, now seen corresponding path program 3 times [2022-03-15 16:34:20,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:20,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210923986] [2022-03-15 16:34:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:20,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:20,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210923986] [2022-03-15 16:34:20,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210923986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:20,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029030468] [2022-03-15 16:34:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:34:20,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:20,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:20,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:34:20,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:34:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:34:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:20,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:34:20,787 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:34:20,787 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 53 treesize of output 47 [2022-03-15 16:34:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:34:20,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:21,225 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 16:34:21,226 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 70 treesize of output 70 [2022-03-15 16:34:21,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-03-15 16:34:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:34:21,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029030468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:21,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:21,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2022-03-15 16:34:21,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844133776] [2022-03-15 16:34:21,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:21,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:34:21,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:34:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:34:21,273 INFO L87 Difference]: Start difference. First operand 616 states and 1811 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:22,692 INFO L93 Difference]: Finished difference Result 2902 states and 8623 transitions. [2022-03-15 16:34:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:34:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 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 35 [2022-03-15 16:34:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:22,701 INFO L225 Difference]: With dead ends: 2902 [2022-03-15 16:34:22,702 INFO L226 Difference]: Without dead ends: 1998 [2022-03-15 16:34:22,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=883, Invalid=3947, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:34:22,705 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1175 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:22,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 306 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:34:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-03-15 16:34:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1029. [2022-03-15 16:34:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.9640077821011674) internal successors, (3047), 1028 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3047 transitions. [2022-03-15 16:34:22,731 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3047 transitions. Word has length 35 [2022-03-15 16:34:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:22,732 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3047 transitions. [2022-03-15 16:34:22,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3047 transitions. [2022-03-15 16:34:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:34:22,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:22,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:22,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:22,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-15 16:34:22,954 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 899682228, now seen corresponding path program 4 times [2022-03-15 16:34:22,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:22,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385004665] [2022-03-15 16:34:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:34:23,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:23,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385004665] [2022-03-15 16:34:23,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385004665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:23,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075287665] [2022-03-15 16:34:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:23,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:23,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:23,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:34:23,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:23,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:34:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:23,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:34:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:34:23,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:23,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-15 16:34:23,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:34:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:34:23,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075287665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:23,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:23,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2022-03-15 16:34:23,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799070009] [2022-03-15 16:34:23,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:23,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:34:23,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:34:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:34:23,250 INFO L87 Difference]: Start difference. First operand 1029 states and 3047 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-03-15 16:34:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:23,291 INFO L93 Difference]: Finished difference Result 2681 states and 7863 transitions. [2022-03-15 16:34:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:34:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 42 [2022-03-15 16:34:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:23,303 INFO L225 Difference]: With dead ends: 2681 [2022-03-15 16:34:23,303 INFO L226 Difference]: Without dead ends: 2651 [2022-03-15 16:34:23,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:34:23,304 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:23,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:34:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-03-15 16:34:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2233. [2022-03-15 16:34:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2022-03-15 16:34:23,370 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 42 [2022-03-15 16:34:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:23,371 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2022-03-15 16:34:23,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-03-15 16:34:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2022-03-15 16:34:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:34:23,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:23,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:23,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:23,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1081871720, now seen corresponding path program 5 times [2022-03-15 16:34:23,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:23,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023675676] [2022-03-15 16:34:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:23,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:23,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023675676] [2022-03-15 16:34:23,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023675676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:23,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137310612] [2022-03-15 16:34:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:23,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:23,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:34:23,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:34:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:34:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:24,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:34:24,431 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:34:24,432 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 121 treesize of output 99 [2022-03-15 16:34:24,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:24,440 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 108 treesize of output 108 [2022-03-15 16:34:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:24,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:25,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:25,266 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 19 treesize of output 23 [2022-03-15 16:34:25,522 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-03-15 16:34:25,522 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 115 treesize of output 133 [2022-03-15 16:34:25,541 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 16:34:25,542 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 110 treesize of output 118 [2022-03-15 16:34:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:25,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137310612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:25,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:25,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:34:25,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327269243] [2022-03-15 16:34:25,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:25,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:34:25,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:34:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:34:25,895 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:29,001 INFO L93 Difference]: Finished difference Result 6909 states and 20715 transitions. [2022-03-15 16:34:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:34:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:34:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:29,029 INFO L225 Difference]: With dead ends: 6909 [2022-03-15 16:34:29,029 INFO L226 Difference]: Without dead ends: 5504 [2022-03-15 16:34:29,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1420, Invalid=4900, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:34:29,031 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 933 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:29,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1474 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:34:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-03-15 16:34:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3165. [2022-03-15 16:34:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 3.036030341340076) internal successors, (9606), 3164 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 9606 transitions. [2022-03-15 16:34:29,138 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 9606 transitions. Word has length 42 [2022-03-15 16:34:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:29,138 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 9606 transitions. [2022-03-15 16:34:29,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 9606 transitions. [2022-03-15 16:34:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:34:29,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:29,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:29,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:29,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:29,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 318436278, now seen corresponding path program 6 times [2022-03-15 16:34:29,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:29,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967695601] [2022-03-15 16:34:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:29,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:29,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967695601] [2022-03-15 16:34:29,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967695601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:29,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976499798] [2022-03-15 16:34:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:29,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:29,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:34:29,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:34:29,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:34:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:29,977 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:34:29,977 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 92 treesize of output 86 [2022-03-15 16:34:30,113 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:34:30,113 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 18 treesize of output 10 [2022-03-15 16:34:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:30,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:30,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:30,676 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 97 treesize of output 101 [2022-03-15 16:34:30,698 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-15 16:34:30,698 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 100 treesize of output 108 [2022-03-15 16:34:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:30,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976499798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:30,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:30,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-03-15 16:34:30,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49533134] [2022-03-15 16:34:30,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:34:30,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:34:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:34:30,809 INFO L87 Difference]: Start difference. First operand 3165 states and 9606 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:42,081 INFO L93 Difference]: Finished difference Result 20247 states and 60887 transitions. [2022-03-15 16:34:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-03-15 16:34:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:34:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:42,140 INFO L225 Difference]: With dead ends: 20247 [2022-03-15 16:34:42,140 INFO L226 Difference]: Without dead ends: 18801 [2022-03-15 16:34:42,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42831 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=18579, Invalid=65231, Unknown=0, NotChecked=0, Total=83810 [2022-03-15 16:34:42,153 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2741 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:42,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 1130 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:34:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2022-03-15 16:34:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 7666. [2022-03-15 16:34:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 3.0841487279843443) internal successors, (23640), 7665 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 23640 transitions. [2022-03-15 16:34:42,412 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 23640 transitions. Word has length 42 [2022-03-15 16:34:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:42,414 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 23640 transitions. [2022-03-15 16:34:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 23640 transitions. [2022-03-15 16:34:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:34:42,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:42,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:42,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 16:34:42,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:42,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -859641656, now seen corresponding path program 7 times [2022-03-15 16:34:42,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:42,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698206697] [2022-03-15 16:34:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:42,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:43,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:43,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698206697] [2022-03-15 16:34:43,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698206697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:43,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708581974] [2022-03-15 16:34:43,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:34:43,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:43,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:43,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:43,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:34:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:34:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:43,371 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:34:43,371 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 92 treesize of output 86 [2022-03-15 16:34:43,500 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:34:43,500 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 53 treesize of output 39 [2022-03-15 16:34:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:43,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:44,230 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-15 16:34:44,230 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 104 treesize of output 112 [2022-03-15 16:34:44,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:44,240 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-03-15 16:34:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:44,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708581974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:44,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:44,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 31 [2022-03-15 16:34:44,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321462656] [2022-03-15 16:34:44,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:34:44,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:34:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:34:44,345 INFO L87 Difference]: Start difference. First operand 7666 states and 23640 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:57,698 INFO L93 Difference]: Finished difference Result 27028 states and 81557 transitions. [2022-03-15 16:34:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-15 16:34:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:34:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:57,759 INFO L225 Difference]: With dead ends: 27028 [2022-03-15 16:34:57,760 INFO L226 Difference]: Without dead ends: 23716 [2022-03-15 16:34:57,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34994 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=14455, Invalid=60347, Unknown=0, NotChecked=0, Total=74802 [2022-03-15 16:34:57,764 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1855 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:57,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 1881 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:34:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23716 states. [2022-03-15 16:34:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23716 to 7942. [2022-03-15 16:34:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 3.1081727742097973) internal successors, (24682), 7941 states have internal predecessors, (24682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 24682 transitions. [2022-03-15 16:34:58,088 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 24682 transitions. Word has length 42 [2022-03-15 16:34:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:58,089 INFO L470 AbstractCegarLoop]: Abstraction has 7942 states and 24682 transitions. [2022-03-15 16:34:58,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 24682 transitions. [2022-03-15 16:34:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:34:58,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:58,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:58,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:58,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:58,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:34:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash 251639076, now seen corresponding path program 8 times [2022-03-15 16:34:58,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:58,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906314495] [2022-03-15 16:34:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:58,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:58,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906314495] [2022-03-15 16:34:58,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906314495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:58,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038034265] [2022-03-15 16:34:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:34:58,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:58,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:58,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:34:58,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:34:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:58,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:34:59,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:59,083 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 154 treesize of output 142 [2022-03-15 16:34:59,087 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:34:59,088 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 115 treesize of output 93 [2022-03-15 16:34:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:59,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:59,718 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 17 treesize of output 21 [2022-03-15 16:34:59,889 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 16:34:59,890 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 122 treesize of output 130 [2022-03-15 16:34:59,909 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-03-15 16:34:59,909 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 109 treesize of output 127 [2022-03-15 16:35:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:00,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038034265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:00,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:00,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-15 16:35:00,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21193537] [2022-03-15 16:35:00,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:00,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:35:00,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:00,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:35:00,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:35:00,422 INFO L87 Difference]: Start difference. First operand 7942 states and 24682 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:06,480 INFO L93 Difference]: Finished difference Result 20315 states and 62151 transitions. [2022-03-15 16:35:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-15 16:35:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:35:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:06,522 INFO L225 Difference]: With dead ends: 20315 [2022-03-15 16:35:06,522 INFO L226 Difference]: Without dead ends: 17396 [2022-03-15 16:35:06,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3583, Invalid=13973, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:35:06,523 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1205 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:06,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1475 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:35:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17396 states. [2022-03-15 16:35:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17396 to 6922. [2022-03-15 16:35:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6921 states have (on average 3.072966334344748) internal successors, (21268), 6921 states have internal predecessors, (21268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 21268 transitions. [2022-03-15 16:35:06,725 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 21268 transitions. Word has length 42 [2022-03-15 16:35:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:06,725 INFO L470 AbstractCegarLoop]: Abstraction has 6922 states and 21268 transitions. [2022-03-15 16:35:06,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 21268 transitions. [2022-03-15 16:35:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:35:06,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:06,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:06,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:06,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:06,972 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:35:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2004363036, now seen corresponding path program 9 times [2022-03-15 16:35:06,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:06,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929871687] [2022-03-15 16:35:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:07,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:07,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929871687] [2022-03-15 16:35:07,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929871687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:07,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130098708] [2022-03-15 16:35:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:35:07,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:07,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:07,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:35:07,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:35:07,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:07,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:35:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:07,476 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:35:07,477 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 92 treesize of output 86 [2022-03-15 16:35:07,593 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:35:07,593 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 53 treesize of output 39 [2022-03-15 16:35:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:35:07,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:08,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:35:08,248 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 97 treesize of output 101 [2022-03-15 16:35:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,268 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-03-15 16:35:08,269 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 100 treesize of output 100 [2022-03-15 16:35:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:35:08,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130098708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:08,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:08,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 31 [2022-03-15 16:35:08,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595623742] [2022-03-15 16:35:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:08,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:08,390 INFO L87 Difference]: Start difference. First operand 6922 states and 21268 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:27,528 INFO L93 Difference]: Finished difference Result 35824 states and 108376 transitions. [2022-03-15 16:35:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-03-15 16:35:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:35:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:27,629 INFO L225 Difference]: With dead ends: 35824 [2022-03-15 16:35:27,629 INFO L226 Difference]: Without dead ends: 33657 [2022-03-15 16:35:27,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84786 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=32112, Invalid=127488, Unknown=0, NotChecked=0, Total=159600 [2022-03-15 16:35:27,635 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3017 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:27,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 1516 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:35:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33657 states. [2022-03-15 16:35:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33657 to 10798. [2022-03-15 16:35:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10798 states, 10797 states have (on average 3.137075113457442) internal successors, (33871), 10797 states have internal predecessors, (33871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10798 states to 10798 states and 33871 transitions. [2022-03-15 16:35:27,994 INFO L78 Accepts]: Start accepts. Automaton has 10798 states and 33871 transitions. Word has length 42 [2022-03-15 16:35:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:27,994 INFO L470 AbstractCegarLoop]: Abstraction has 10798 states and 33871 transitions. [2022-03-15 16:35:27,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 10798 states and 33871 transitions. [2022-03-15 16:35:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:35:28,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:28,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:28,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:28,254 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,SelfDestructingSolverStorable11 [2022-03-15 16:35:28,254 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:35:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1846831292, now seen corresponding path program 10 times [2022-03-15 16:35:28,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:28,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967898711] [2022-03-15 16:35:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:28,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:28,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967898711] [2022-03-15 16:35:28,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967898711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:28,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792804332] [2022-03-15 16:35:28,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:35:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:28,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:35:28,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:35:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:35:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:28,787 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:35:28,788 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 92 treesize of output 86 [2022-03-15 16:35:28,978 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:35:28,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-03-15 16:35:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:29,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:29,741 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-03-15 16:35:29,741 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 104 treesize of output 112 [2022-03-15 16:35:29,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:35:29,748 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 87 treesize of output 91 [2022-03-15 16:35:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:29,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792804332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:29,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:29,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-03-15 16:35:29,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545406818] [2022-03-15 16:35:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:35:29,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:35:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:35:29,850 INFO L87 Difference]: Start difference. First operand 10798 states and 33871 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:54,924 INFO L93 Difference]: Finished difference Result 27482 states and 83508 transitions. [2022-03-15 16:35:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-03-15 16:35:54,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:35:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:54,975 INFO L225 Difference]: With dead ends: 27482 [2022-03-15 16:35:54,976 INFO L226 Difference]: Without dead ends: 25101 [2022-03-15 16:35:54,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97579 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=31327, Invalid=165365, Unknown=0, NotChecked=0, Total=196692 [2022-03-15 16:35:54,983 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3310 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:54,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 1652 Invalid, 4656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-15 16:35:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25101 states. [2022-03-15 16:35:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25101 to 9862. [2022-03-15 16:35:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9862 states, 9861 states have (on average 3.1219957407970793) internal successors, (30786), 9861 states have internal predecessors, (30786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 30786 transitions. [2022-03-15 16:35:55,218 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 30786 transitions. Word has length 42 [2022-03-15 16:35:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:55,218 INFO L470 AbstractCegarLoop]: Abstraction has 9862 states and 30786 transitions. [2022-03-15 16:35:55,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 30786 transitions. [2022-03-15 16:35:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:35:55,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:55,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:55,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:35:55,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:35:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -287176812, now seen corresponding path program 11 times [2022-03-15 16:35:55,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:55,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012873719] [2022-03-15 16:35:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:55,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:55,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012873719] [2022-03-15 16:35:55,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012873719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:55,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464668527] [2022-03-15 16:35:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:35:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:55,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:55,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:35:55,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:35:55,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:35:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:55,841 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:35:55,841 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 18 treesize of output 10 [2022-03-15 16:35:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:35:55,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:56,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:35:56,029 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 81 treesize of output 101 [2022-03-15 16:35:56,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:35:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:35:56,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464668527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:56,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:56,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 27 [2022-03-15 16:35:56,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826589350] [2022-03-15 16:35:56,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:35:56,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:35:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:35:56,161 INFO L87 Difference]: Start difference. First operand 9862 states and 30786 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:00,067 INFO L93 Difference]: Finished difference Result 40668 states and 122041 transitions. [2022-03-15 16:36:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-15 16:36:00,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 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 44 [2022-03-15 16:36:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:00,159 INFO L225 Difference]: With dead ends: 40668 [2022-03-15 16:36:00,159 INFO L226 Difference]: Without dead ends: 40275 [2022-03-15 16:36:00,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4220, Invalid=19036, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 16:36:00,160 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1676 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:00,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 1199 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:36:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40275 states. [2022-03-15 16:36:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40275 to 10540. [2022-03-15 16:36:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10540 states, 10539 states have (on average 3.0748647879305437) internal successors, (32406), 10539 states have internal predecessors, (32406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10540 states to 10540 states and 32406 transitions. [2022-03-15 16:36:00,509 INFO L78 Accepts]: Start accepts. Automaton has 10540 states and 32406 transitions. Word has length 44 [2022-03-15 16:36:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:00,509 INFO L470 AbstractCegarLoop]: Abstraction has 10540 states and 32406 transitions. [2022-03-15 16:36:00,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10540 states and 32406 transitions. [2022-03-15 16:36:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:36:00,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:00,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:00,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:00,735 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,SelfDestructingSolverStorable13 [2022-03-15 16:36:00,735 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1178577320, now seen corresponding path program 12 times [2022-03-15 16:36:00,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:00,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177003999] [2022-03-15 16:36:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:00,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:01,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:01,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177003999] [2022-03-15 16:36:01,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177003999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:01,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903393690] [2022-03-15 16:36:01,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:01,008 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) [2022-03-15 16:36:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:36:01,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:36:01,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:36:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:01,199 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:01,199 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 80 treesize of output 74 [2022-03-15 16:36:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:01,335 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-15 16:36:01,335 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 39 treesize of output 30 [2022-03-15 16:36:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:01,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:01,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-15 16:36:01,582 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 16:36:01,582 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 69 treesize of output 68 [2022-03-15 16:36:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:01,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903393690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:01,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:01,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2022-03-15 16:36:01,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028925731] [2022-03-15 16:36:01,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:01,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:36:01,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:01,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:36:01,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:36:01,617 INFO L87 Difference]: Start difference. First operand 10540 states and 32406 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:15,548 INFO L93 Difference]: Finished difference Result 50637 states and 153811 transitions. [2022-03-15 16:36:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 424 states. [2022-03-15 16:36:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 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 44 [2022-03-15 16:36:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:15,733 INFO L225 Difference]: With dead ends: 50637 [2022-03-15 16:36:15,733 INFO L226 Difference]: Without dead ends: 46887 [2022-03-15 16:36:15,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95200 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=24936, Invalid=168224, Unknown=0, NotChecked=0, Total=193160 [2022-03-15 16:36:15,740 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 2585 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 4432 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 4432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:15,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 1306 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 4432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:36:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46887 states. [2022-03-15 16:36:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46887 to 11459. [2022-03-15 16:36:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 11458 states have (on average 3.062925466922674) internal successors, (35095), 11458 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 35095 transitions. [2022-03-15 16:36:16,172 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 35095 transitions. Word has length 44 [2022-03-15 16:36:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 11459 states and 35095 transitions. [2022-03-15 16:36:16,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 35095 transitions. [2022-03-15 16:36:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-15 16:36:16,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:16,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:16,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:16,393 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,SelfDestructingSolverStorable14 [2022-03-15 16:36:16,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1670748072, now seen corresponding path program 13 times [2022-03-15 16:36:16,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:16,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921564898] [2022-03-15 16:36:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:36:16,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:16,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921564898] [2022-03-15 16:36:16,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921564898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:16,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538389975] [2022-03-15 16:36:16,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:16,416 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) [2022-03-15 16:36:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:36:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:36:16,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 16:36:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 16:36:16,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538389975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:16,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:16,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-03-15 16:36:16,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601220738] [2022-03-15 16:36:16,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:16,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:36:16,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:16,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:36:16,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:16,594 INFO L87 Difference]: Start difference. First operand 11459 states and 35095 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-03-15 16:36:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:16,708 INFO L93 Difference]: Finished difference Result 25716 states and 78317 transitions. [2022-03-15 16:36:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:36:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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 46 [2022-03-15 16:36:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:16,767 INFO L225 Difference]: With dead ends: 25716 [2022-03-15 16:36:16,767 INFO L226 Difference]: Without dead ends: 25682 [2022-03-15 16:36:16,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:16,769 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-03-15 16:36:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 22310. [2022-03-15 16:36:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 22309 states have (on average 3.1084315747007936) internal successors, (69346), 22309 states have internal predecessors, (69346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 69346 transitions. [2022-03-15 16:36:17,196 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 69346 transitions. Word has length 46 [2022-03-15 16:36:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 69346 transitions. [2022-03-15 16:36:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2022-03-15 16:36:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 69346 transitions. [2022-03-15 16:36:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 16:36:17,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:17,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:17,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:17,446 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,SelfDestructingSolverStorable15 [2022-03-15 16:36:17,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash 912464441, now seen corresponding path program 14 times [2022-03-15 16:36:17,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:17,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161180196] [2022-03-15 16:36:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:36:17,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:17,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161180196] [2022-03-15 16:36:17,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161180196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:17,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338235564] [2022-03-15 16:36:17,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:17,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:17,822 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) [2022-03-15 16:36:17,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:36:17,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:17,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:36:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:18,202 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:18,202 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 92 treesize of output 86 [2022-03-15 16:36:18,406 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:18,406 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 18 treesize of output 10 [2022-03-15 16:36:18,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:36:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:36:18,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:18,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:18,573 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 14 treesize of output 18 [2022-03-15 16:36:19,046 INFO L353 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2022-03-15 16:36:19,047 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 108 treesize of output 126 [2022-03-15 16:36:19,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:19,056 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 87 treesize of output 91 [2022-03-15 16:36:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:36:19,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338235564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:19,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:19,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-03-15 16:36:19,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589454493] [2022-03-15 16:36:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:36:19,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:36:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:36:19,288 INFO L87 Difference]: Start difference. First operand 22310 states and 69346 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:24,357 INFO L93 Difference]: Finished difference Result 58363 states and 177073 transitions. [2022-03-15 16:36:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-15 16:36:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 16:36:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:24,496 INFO L225 Difference]: With dead ends: 58363 [2022-03-15 16:36:24,496 INFO L226 Difference]: Without dead ends: 51234 [2022-03-15 16:36:24,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10776 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5550, Invalid=23180, Unknown=0, NotChecked=0, Total=28730 [2022-03-15 16:36:24,498 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 2375 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:24,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 1291 Invalid, 4105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:36:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51234 states. [2022-03-15 16:36:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51234 to 25797. [2022-03-15 16:36:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25797 states, 25796 states have (on average 3.0408590479144055) internal successors, (78442), 25796 states have internal predecessors, (78442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25797 states to 25797 states and 78442 transitions. [2022-03-15 16:36:25,508 INFO L78 Accepts]: Start accepts. Automaton has 25797 states and 78442 transitions. Word has length 47 [2022-03-15 16:36:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 25797 states and 78442 transitions. [2022-03-15 16:36:25,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25797 states and 78442 transitions. [2022-03-15 16:36:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 16:36:25,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:25,554 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:25,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-15 16:36:25,769 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,SelfDestructingSolverStorable16 [2022-03-15 16:36:25,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash 189048965, now seen corresponding path program 15 times [2022-03-15 16:36:25,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:25,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013166769] [2022-03-15 16:36:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:25,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:36:25,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:25,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013166769] [2022-03-15 16:36:25,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013166769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:25,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324614171] [2022-03-15 16:36:25,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:25,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:25,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:25,922 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) [2022-03-15 16:36:25,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:36:25,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:36:25,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:36:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:26,640 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:26,640 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 124 treesize of output 112 [2022-03-15 16:36:26,967 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:36:26,967 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 111 treesize of output 83 [2022-03-15 16:36:27,419 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:27,419 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 25 treesize of output 13 [2022-03-15 16:36:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:36:27,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:28,313 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:28,313 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 37 treesize of output 61 [2022-03-15 16:36:28,836 INFO L353 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-03-15 16:36:28,837 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 168 treesize of output 180 [2022-03-15 16:36:28,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:28,870 INFO L353 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-03-15 16:36:28,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 155 [2022-03-15 16:36:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:36:29,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324614171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:29,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:29,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 19] total 48 [2022-03-15 16:36:29,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152384349] [2022-03-15 16:36:29,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:29,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:36:29,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:36:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:36:29,535 INFO L87 Difference]: Start difference. First operand 25797 states and 78442 transitions. Second operand has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:42,685 INFO L93 Difference]: Finished difference Result 97112 states and 293648 transitions. [2022-03-15 16:36:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-15 16:36:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 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 49 [2022-03-15 16:36:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:42,928 INFO L225 Difference]: With dead ends: 97112 [2022-03-15 16:36:42,928 INFO L226 Difference]: Without dead ends: 84220 [2022-03-15 16:36:42,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27915 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=16169, Invalid=40713, Unknown=0, NotChecked=0, Total=56882 [2022-03-15 16:36:42,930 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1820 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 5035 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:42,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2100 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5035 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 16:36:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84220 states. [2022-03-15 16:36:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84220 to 33391. [2022-03-15 16:36:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33391 states, 33390 states have (on average 3.055944893680743) internal successors, (102038), 33390 states have internal predecessors, (102038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33391 states to 33391 states and 102038 transitions. [2022-03-15 16:36:44,269 INFO L78 Accepts]: Start accepts. Automaton has 33391 states and 102038 transitions. Word has length 49 [2022-03-15 16:36:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:44,269 INFO L470 AbstractCegarLoop]: Abstraction has 33391 states and 102038 transitions. [2022-03-15 16:36:44,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33391 states and 102038 transitions. [2022-03-15 16:36:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-15 16:36:44,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:44,321 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:44,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:44,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,535 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1519631584, now seen corresponding path program 16 times [2022-03-15 16:36:44,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:44,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003564815] [2022-03-15 16:36:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:44,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003564815] [2022-03-15 16:36:44,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003564815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:44,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031914401] [2022-03-15 16:36:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:44,946 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) [2022-03-15 16:36:44,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:36:44,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:44,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:36:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:45,168 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:45,168 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 88 treesize of output 82 [2022-03-15 16:36:45,232 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:36:45,232 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 18 treesize of output 10 [2022-03-15 16:36:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-15 16:36:45,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:45,558 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:45,558 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 96 treesize of output 120 [2022-03-15 16:36:45,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:36:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-15 16:36:45,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031914401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:45,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:45,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 32 [2022-03-15 16:36:45,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887442640] [2022-03-15 16:36:45,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:36:45,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:36:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:36:45,702 INFO L87 Difference]: Start difference. First operand 33391 states and 102038 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:52,511 INFO L93 Difference]: Finished difference Result 131426 states and 404962 transitions. [2022-03-15 16:36:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-15 16:36:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 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 50 [2022-03-15 16:36:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:53,086 INFO L225 Difference]: With dead ends: 131426 [2022-03-15 16:36:53,086 INFO L226 Difference]: Without dead ends: 114464 [2022-03-15 16:36:53,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8414, Invalid=35058, Unknown=0, NotChecked=0, Total=43472 [2022-03-15 16:36:53,089 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1640 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 1257 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:36:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114464 states. [2022-03-15 16:36:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114464 to 44522. [2022-03-15 16:36:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.0804564138271826) internal successors, (137145), 44521 states have internal predecessors, (137145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 137145 transitions. [2022-03-15 16:36:54,789 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 137145 transitions. Word has length 50 [2022-03-15 16:36:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:54,789 INFO L470 AbstractCegarLoop]: Abstraction has 44522 states and 137145 transitions. [2022-03-15 16:36:54,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 137145 transitions. [2022-03-15 16:36:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:36:54,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:54,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:54,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:55,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:55,064 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:55,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -867515449, now seen corresponding path program 17 times [2022-03-15 16:36:55,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:55,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711197268] [2022-03-15 16:36:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 16:36:55,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:55,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711197268] [2022-03-15 16:36:55,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711197268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:55,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70074824] [2022-03-15 16:36:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:55,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:55,128 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) [2022-03-15 16:36:55,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:36:55,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 16:36:55,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:36:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:55,372 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 7 [2022-03-15 16:36:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 16:36:55,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:55,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:55,537 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 86 treesize of output 90 [2022-03-15 16:36:55,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:36:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 16:36:55,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70074824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:55,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:55,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-03-15 16:36:55,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712537146] [2022-03-15 16:36:55,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:55,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:55,574 INFO L87 Difference]: Start difference. First operand 44522 states and 137145 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:55,943 INFO L93 Difference]: Finished difference Result 53825 states and 165071 transitions. [2022-03-15 16:36:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:36:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:36:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:56,096 INFO L225 Difference]: With dead ends: 53825 [2022-03-15 16:36:56,096 INFO L226 Difference]: Without dead ends: 53723 [2022-03-15 16:36:56,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:56,097 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:56,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 159 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53723 states. [2022-03-15 16:36:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53723 to 51223. [2022-03-15 16:36:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51223 states, 51222 states have (on average 3.0916403108039514) internal successors, (158360), 51222 states have internal predecessors, (158360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51223 states to 51223 states and 158360 transitions. [2022-03-15 16:36:57,492 INFO L78 Accepts]: Start accepts. Automaton has 51223 states and 158360 transitions. Word has length 51 [2022-03-15 16:36:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:57,492 INFO L470 AbstractCegarLoop]: Abstraction has 51223 states and 158360 transitions. [2022-03-15 16:36:57,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51223 states and 158360 transitions. [2022-03-15 16:36:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:36:57,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:57,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:57,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:57,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:57,802 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1449455409, now seen corresponding path program 18 times [2022-03-15 16:36:57,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:57,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486812453] [2022-03-15 16:36:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:58,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:58,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486812453] [2022-03-15 16:36:58,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486812453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:58,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429136701] [2022-03-15 16:36:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:58,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:58,367 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) [2022-03-15 16:36:58,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:36:58,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:36:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:36:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:58,559 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 16:36:58,559 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 22 treesize of output 10 [2022-03-15 16:36:58,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:36:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:58,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:58,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:58,710 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 20 [2022-03-15 16:36:58,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:58,918 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 101 treesize of output 121 [2022-03-15 16:36:58,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:36:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:59,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429136701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:59,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:59,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 33 [2022-03-15 16:36:59,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207085662] [2022-03-15 16:36:59,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:59,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:36:59,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:36:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:36:59,142 INFO L87 Difference]: Start difference. First operand 51223 states and 158360 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:27,413 INFO L93 Difference]: Finished difference Result 170953 states and 518659 transitions. [2022-03-15 16:37:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 648 states. [2022-03-15 16:37:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:37:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:28,213 INFO L225 Difference]: With dead ends: 170953 [2022-03-15 16:37:28,214 INFO L226 Difference]: Without dead ends: 168633 [2022-03-15 16:37:28,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213233 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=40465, Invalid=403757, Unknown=0, NotChecked=0, Total=444222 [2022-03-15 16:37:28,227 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2139 mSDsluCounter, 8948 mSDsCounter, 0 mSdLazyCounter, 11527 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 7126 SdHoareTripleChecker+Invalid, 12145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 11527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:28,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 7126 Invalid, 12145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 11527 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-15 16:37:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168633 states. [2022-03-15 16:37:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168633 to 80389. [2022-03-15 16:37:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80389 states, 80388 states have (on average 3.1265984972881524) internal successors, (251341), 80388 states have internal predecessors, (251341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80389 states to 80389 states and 251341 transitions. [2022-03-15 16:37:31,066 INFO L78 Accepts]: Start accepts. Automaton has 80389 states and 251341 transitions. Word has length 51 [2022-03-15 16:37:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:31,066 INFO L470 AbstractCegarLoop]: Abstraction has 80389 states and 251341 transitions. [2022-03-15 16:37:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 80389 states and 251341 transitions. [2022-03-15 16:37:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:37:31,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:31,457 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:31,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:31,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:31,673 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 786519139, now seen corresponding path program 19 times [2022-03-15 16:37:31,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:31,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67528558] [2022-03-15 16:37:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:32,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67528558] [2022-03-15 16:37:32,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67528558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:32,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393750634] [2022-03-15 16:37:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:32,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:32,107 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) [2022-03-15 16:37:32,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:37:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:37:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:32,307 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 16:37:32,308 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 22 treesize of output 10 [2022-03-15 16:37:32,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:37:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:37:32,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:32,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:32,485 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 13 treesize of output 17 [2022-03-15 16:37:32,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-15 16:37:32,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:32,664 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 87 treesize of output 107 [2022-03-15 16:37:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:37:32,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393750634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:32,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:32,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 32 [2022-03-15 16:37:32,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653225852] [2022-03-15 16:37:32,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:32,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:37:32,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:37:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:37:32,793 INFO L87 Difference]: Start difference. First operand 80389 states and 251341 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:36,525 INFO L93 Difference]: Finished difference Result 129938 states and 401241 transitions. [2022-03-15 16:37:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:37:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:37:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:37,106 INFO L225 Difference]: With dead ends: 129938 [2022-03-15 16:37:37,107 INFO L226 Difference]: Without dead ends: 128529 [2022-03-15 16:37:37,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1692, Invalid=13808, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 16:37:37,109 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 776 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:37,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 1484 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:37:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128529 states. [2022-03-15 16:37:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128529 to 82939. [2022-03-15 16:37:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82939 states, 82938 states have (on average 3.098278231932287) internal successors, (256965), 82938 states have internal predecessors, (256965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82939 states to 82939 states and 256965 transitions. [2022-03-15 16:37:39,563 INFO L78 Accepts]: Start accepts. Automaton has 82939 states and 256965 transitions. Word has length 51 [2022-03-15 16:37:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:39,564 INFO L470 AbstractCegarLoop]: Abstraction has 82939 states and 256965 transitions. [2022-03-15 16:37:39,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 82939 states and 256965 transitions. [2022-03-15 16:37:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:37:39,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:39,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:39,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:39,931 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash 931116739, now seen corresponding path program 20 times [2022-03-15 16:37:39,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:39,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797338572] [2022-03-15 16:37:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:37:40,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:40,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797338572] [2022-03-15 16:37:40,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797338572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:40,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143921778] [2022-03-15 16:37:40,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:40,160 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) [2022-03-15 16:37:40,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:37:40,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:37:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:40,388 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:37:40,388 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 18 treesize of output 10 [2022-03-15 16:37:40,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 16:37:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:37:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:40,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:40,500 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 20 [2022-03-15 16:37:40,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:40,873 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 89 treesize of output 109 [2022-03-15 16:37:40,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:37:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:37:41,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143921778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:41,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:41,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-15 16:37:41,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751280219] [2022-03-15 16:37:41,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:41,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:37:41,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:41,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:37:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:37:41,034 INFO L87 Difference]: Start difference. First operand 82939 states and 256965 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:43,002 INFO L93 Difference]: Finished difference Result 139406 states and 427719 transitions. [2022-03-15 16:37:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:37:43,002 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 16:37:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:43,459 INFO L225 Difference]: With dead ends: 139406 [2022-03-15 16:37:43,459 INFO L226 Difference]: Without dead ends: 138710 [2022-03-15 16:37:43,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=454, Invalid=3328, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:37:43,460 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 435 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:43,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1190 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:37:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138710 states. [2022-03-15 16:37:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138710 to 83027. [2022-03-15 16:37:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83027 states, 83026 states have (on average 3.0981258882759617) internal successors, (257225), 83026 states have internal predecessors, (257225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83027 states to 83027 states and 257225 transitions. [2022-03-15 16:37:45,991 INFO L78 Accepts]: Start accepts. Automaton has 83027 states and 257225 transitions. Word has length 51 [2022-03-15 16:37:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 83027 states and 257225 transitions. [2022-03-15 16:37:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 83027 states and 257225 transitions. [2022-03-15 16:37:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 16:37:46,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:46,395 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:46,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 16:37:46,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:46,600 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 741648217, now seen corresponding path program 21 times [2022-03-15 16:37:46,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:46,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144182825] [2022-03-15 16:37:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 16:37:46,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:46,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144182825] [2022-03-15 16:37:46,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144182825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:46,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077063462] [2022-03-15 16:37:46,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:46,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:46,733 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) [2022-03-15 16:37:46,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:37:46,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:37:46,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:37:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:46,927 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:37:46,927 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 18 treesize of output 10 [2022-03-15 16:37:47,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 16:37:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:37:47,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:47,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:47,165 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 14 treesize of output 18 [2022-03-15 16:37:47,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:47,437 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 96 treesize of output 112 [2022-03-15 16:37:47,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:37:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:37:47,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077063462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:47,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:47,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-03-15 16:37:47,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773457640] [2022-03-15 16:37:47,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:47,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:37:47,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:37:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:37:47,584 INFO L87 Difference]: Start difference. First operand 83027 states and 257225 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:55,314 INFO L93 Difference]: Finished difference Result 197704 states and 595244 transitions. [2022-03-15 16:37:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-03-15 16:37:55,314 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 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 51 [2022-03-15 16:37:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:55,878 INFO L225 Difference]: With dead ends: 197704 [2022-03-15 16:37:55,878 INFO L226 Difference]: Without dead ends: 193845 [2022-03-15 16:37:55,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32872 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8079, Invalid=68373, Unknown=0, NotChecked=0, Total=76452 [2022-03-15 16:37:55,882 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1964 mSDsluCounter, 3368 mSDsCounter, 0 mSdLazyCounter, 5449 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 6073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 5449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:55,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 2399 Invalid, 6073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 5449 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:37:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193845 states. [2022-03-15 16:37:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193845 to 79515. [2022-03-15 16:37:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79515 states, 79514 states have (on average 3.0640390371506903) internal successors, (243634), 79514 states have internal predecessors, (243634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79515 states to 79515 states and 243634 transitions. [2022-03-15 16:37:58,822 INFO L78 Accepts]: Start accepts. Automaton has 79515 states and 243634 transitions. Word has length 51 [2022-03-15 16:37:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:58,823 INFO L470 AbstractCegarLoop]: Abstraction has 79515 states and 243634 transitions. [2022-03-15 16:37:58,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79515 states and 243634 transitions. [2022-03-15 16:37:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-15 16:37:58,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:58,967 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:58,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:59,168 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,SelfDestructingSolverStorable23 [2022-03-15 16:37:59,168 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:59,169 INFO L85 PathProgramCache]: Analyzing trace with hash -944128953, now seen corresponding path program 22 times [2022-03-15 16:37:59,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:59,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142085050] [2022-03-15 16:37:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:59,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:59,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:59,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142085050] [2022-03-15 16:37:59,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142085050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:59,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808526344] [2022-03-15 16:37:59,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:59,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:59,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:59,490 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) [2022-03-15 16:37:59,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:38:00,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:00,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:38:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:00,228 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:38:00,228 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 18 treesize of output 10 [2022-03-15 16:38:00,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:38:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:38:00,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:00,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:00,401 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 20 [2022-03-15 16:38:00,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:00,594 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 89 treesize of output 109 [2022-03-15 16:38:00,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:38:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:38:00,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808526344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:00,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:00,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 35 [2022-03-15 16:38:00,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245567713] [2022-03-15 16:38:00,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:00,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:38:00,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:38:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:38:00,721 INFO L87 Difference]: Start difference. First operand 79515 states and 243634 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:13,104 INFO L93 Difference]: Finished difference Result 144721 states and 440668 transitions. [2022-03-15 16:38:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 355 states. [2022-03-15 16:38:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 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 55 [2022-03-15 16:38:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:13,773 INFO L225 Difference]: With dead ends: 144721 [2022-03-15 16:38:13,773 INFO L226 Difference]: Without dead ends: 143470 [2022-03-15 16:38:13,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64962 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13480, Invalid=132826, Unknown=0, NotChecked=0, Total=146306 [2022-03-15 16:38:13,779 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1700 mSDsluCounter, 4185 mSDsCounter, 0 mSdLazyCounter, 8783 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 9322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 8783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:13,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 3326 Invalid, 9322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 8783 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:38:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143470 states. [2022-03-15 16:38:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143470 to 69347. [2022-03-15 16:38:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69347 states, 69346 states have (on average 3.0609840509906845) internal successors, (212267), 69346 states have internal predecessors, (212267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69347 states to 69347 states and 212267 transitions. [2022-03-15 16:38:16,158 INFO L78 Accepts]: Start accepts. Automaton has 69347 states and 212267 transitions. Word has length 55 [2022-03-15 16:38:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:16,158 INFO L470 AbstractCegarLoop]: Abstraction has 69347 states and 212267 transitions. [2022-03-15 16:38:16,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69347 states and 212267 transitions. [2022-03-15 16:38:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 16:38:16,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:16,557 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:16,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:16,772 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,SelfDestructingSolverStorable24 [2022-03-15 16:38:16,772 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash -332459897, now seen corresponding path program 23 times [2022-03-15 16:38:16,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:16,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905002348] [2022-03-15 16:38:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:38:17,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:17,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905002348] [2022-03-15 16:38:17,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905002348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:17,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283692198] [2022-03-15 16:38:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:17,072 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) [2022-03-15 16:38:17,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:38:17,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:38:17,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 16:38:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:17,314 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 16:38:17,314 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 29 treesize of output 13 [2022-03-15 16:38:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:38:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:17,593 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-15 16:38:17,593 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 95 treesize of output 105 [2022-03-15 16:38:17,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:38:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 16:38:17,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283692198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:17,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:17,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 30 [2022-03-15 16:38:17,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381592844] [2022-03-15 16:38:17,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:17,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:38:17,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:38:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:38:17,678 INFO L87 Difference]: Start difference. First operand 69347 states and 212267 transitions. Second operand has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:25,521 INFO L93 Difference]: Finished difference Result 242363 states and 739180 transitions. [2022-03-15 16:38:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-15 16:38:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 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 56 [2022-03-15 16:38:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:26,530 INFO L225 Difference]: With dead ends: 242363 [2022-03-15 16:38:26,530 INFO L226 Difference]: Without dead ends: 234109 [2022-03-15 16:38:26,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17601 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8221, Invalid=29999, Unknown=0, NotChecked=0, Total=38220 [2022-03-15 16:38:26,535 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1905 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:26,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1905 Valid, 1833 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:38:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234109 states. [2022-03-15 16:38:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234109 to 120881. [2022-03-15 16:38:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120881 states, 120880 states have (on average 3.071657842488418) internal successors, (371302), 120880 states have internal predecessors, (371302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120881 states to 120881 states and 371302 transitions. [2022-03-15 16:38:30,912 INFO L78 Accepts]: Start accepts. Automaton has 120881 states and 371302 transitions. Word has length 56 [2022-03-15 16:38:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:30,913 INFO L470 AbstractCegarLoop]: Abstraction has 120881 states and 371302 transitions. [2022-03-15 16:38:30,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 120881 states and 371302 transitions. [2022-03-15 16:38:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 16:38:31,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:31,471 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:31,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:31,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:38:31,686 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1980953451, now seen corresponding path program 24 times [2022-03-15 16:38:31,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:31,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200597894] [2022-03-15 16:38:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:38:31,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:31,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200597894] [2022-03-15 16:38:31,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200597894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:31,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83953009] [2022-03-15 16:38:31,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:31,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:31,810 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) [2022-03-15 16:38:31,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:38:31,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:38:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:31,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:38:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:32,290 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:38:32,290 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 102 treesize of output 92 [2022-03-15 16:38:32,423 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:38:32,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:38:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:38:32,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:32,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-03-15 16:38:32,925 INFO L353 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2022-03-15 16:38:32,926 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 105 treesize of output 110 [2022-03-15 16:38:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 16:38:33,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83953009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:33,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:33,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2022-03-15 16:38:33,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055236937] [2022-03-15 16:38:33,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:33,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:38:33,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:38:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:38:33,144 INFO L87 Difference]: Start difference. First operand 120881 states and 371302 transitions. Second operand has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:39,742 INFO L93 Difference]: Finished difference Result 414058 states and 1277939 transitions. [2022-03-15 16:38:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-15 16:38:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 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 56 [2022-03-15 16:38:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:41,616 INFO L225 Difference]: With dead ends: 414058 [2022-03-15 16:38:41,616 INFO L226 Difference]: Without dead ends: 414058 [2022-03-15 16:38:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11922 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5874, Invalid=20858, Unknown=0, NotChecked=0, Total=26732 [2022-03-15 16:38:41,617 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1541 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:41,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1590 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:38:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414058 states. [2022-03-15 16:38:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414058 to 213658. [2022-03-15 16:38:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213658 states, 213657 states have (on average 3.151158164721961) internal successors, (673267), 213657 states have internal predecessors, (673267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213658 states to 213658 states and 673267 transitions. [2022-03-15 16:38:51,227 INFO L78 Accepts]: Start accepts. Automaton has 213658 states and 673267 transitions. Word has length 56 [2022-03-15 16:38:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 213658 states and 673267 transitions. [2022-03-15 16:38:51,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 213658 states and 673267 transitions. [2022-03-15 16:38:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-15 16:38:51,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:51,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:51,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 16:38:52,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:52,146 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1483575497, now seen corresponding path program 25 times [2022-03-15 16:38:52,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:52,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158260558] [2022-03-15 16:38:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:38:52,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:52,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158260558] [2022-03-15 16:38:52,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158260558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:52,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753191749] [2022-03-15 16:38:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:52,452 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) [2022-03-15 16:38:52,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:38:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:38:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:52,794 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:38:52,794 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 92 treesize of output 86 [2022-03-15 16:38:52,949 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:38:52,949 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 25 treesize of output 13 [2022-03-15 16:38:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:38:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:53,703 INFO L353 Elim1Store]: treesize reduction 58, result has 44.8 percent of original size [2022-03-15 16:38:53,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 145 [2022-03-15 16:38:53,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-03-15 16:38:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:38:54,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753191749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:54,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:54,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2022-03-15 16:38:54,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612588023] [2022-03-15 16:38:54,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:54,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:38:54,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:38:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:38:54,105 INFO L87 Difference]: Start difference. First operand 213658 states and 673267 transitions. Second operand has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:28,066 INFO L93 Difference]: Finished difference Result 687845 states and 2146853 transitions. [2022-03-15 16:39:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2022-03-15 16:39:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 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 58 [2022-03-15 16:39:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:33,395 INFO L225 Difference]: With dead ends: 687845 [2022-03-15 16:39:33,395 INFO L226 Difference]: Without dead ends: 655736 [2022-03-15 16:39:33,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223493 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=52945, Invalid=389945, Unknown=0, NotChecked=0, Total=442890 [2022-03-15 16:39:33,412 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2920 mSDsluCounter, 3107 mSDsCounter, 0 mSdLazyCounter, 6037 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 7019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 6037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:33,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2920 Valid, 2275 Invalid, 7019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 6037 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-15 16:39:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655736 states.