/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:16:53,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:16:53,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:16:53,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 06:16:53,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 06:16:53,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 06:16:53,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 06:16:53,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 06:16:53,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 06:16:53,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 06:16:53,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 06:16:53,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 06:16:53,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 06:16:53,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 06:16:53,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 06:16:53,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 06:16:53,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:16:53,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:16:53,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:16:53,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:16:53,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:16:53,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:16:53,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:16:53,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:16:53,917 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:16:53,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:16:53,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:16:53,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:16:53,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:16:53,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:16:53,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:16:53,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:16:53,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:16:53,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:16:53,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:16:53,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:16:53,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:16:53,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:16:53,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:16:54,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:16:54,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:16:54,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:16:54,169 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:16:54,169 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:16:54,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2022-01-18 06:16:54,171 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2022-01-18 06:16:54,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:16:54,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:16:54,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:16:54,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:16:54,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:16:54,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,228 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:16:54,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:16:54,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:16:54,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:16:54,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:16:54,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:16:54,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:16:54,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:16:54,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:16:54,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/1) ... [2022-01-18 06:16:54,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:16:54,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:54,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:16:54,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:16:54,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:16:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:16:54,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:16:54,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:16:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:16:54,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:16:54,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:16:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:16:54,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:16:54,311 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:16:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:16:54,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:16:54,311 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:16:54,350 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:16:54,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:16:54,435 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:16:54,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:16:54,453 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:16:54,454 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:16:54 BoogieIcfgContainer [2022-01-18 06:16:54,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:16:54,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:16:54,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:16:54,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:16:54,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:16:54" (1/2) ... [2022-01-18 06:16:54,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467a6fe4 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:16:54, skipping insertion in model container [2022-01-18 06:16:54,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:16:54" (2/2) ... [2022-01-18 06:16:54,465 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2022-01-18 06:16:54,469 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:16:54,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:16:54,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:16:54,469 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:16:54,527 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:16:54,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:16:54,626 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:16:54,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:16:54,640 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-01-18 06:16:54,696 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 06:16:54,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:54,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:54,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 510990075, now seen corresponding path program 1 times [2022-01-18 06:16:54,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:54,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786945779] [2022-01-18 06:16:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:54,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:54,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786945779] [2022-01-18 06:16:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786945779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:54,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:54,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:16:54,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326828827] [2022-01-18 06:16:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:54,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:16:54,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:16:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:16:54,993 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 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) [2022-01-18 06:16:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:55,059 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-01-18 06:16:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:16:55,069 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 [2022-01-18 06:16:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:55,093 INFO L225 Difference]: With dead ends: 257 [2022-01-18 06:16:55,094 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 06:16:55,115 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 [2022-01-18 06:16:55,121 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:55,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:16:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 06:16:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-01-18 06:16:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-01-18 06:16:55,204 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-01-18 06:16:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:55,226 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-01-18 06:16:55,226 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) [2022-01-18 06:16:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-01-18 06:16:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:16:55,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:55,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:55,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:16:55,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash 761707259, now seen corresponding path program 1 times [2022-01-18 06:16:55,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:55,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420431214] [2022-01-18 06:16:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:55,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:55,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:55,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420431214] [2022-01-18 06:16:55,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420431214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:55,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:55,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:16:55,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033729298] [2022-01-18 06:16:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:16:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:16:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:16:55,362 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:55,436 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2022-01-18 06:16:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:16:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:16:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:55,441 INFO L225 Difference]: With dead ends: 355 [2022-01-18 06:16:55,441 INFO L226 Difference]: Without dead ends: 355 [2022-01-18 06:16:55,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:16:55,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:55,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-18 06:16:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2022-01-18 06:16:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2022-01-18 06:16:55,467 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2022-01-18 06:16:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:55,467 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2022-01-18 06:16:55,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2022-01-18 06:16:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:16:55,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:55,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:55,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:16:55,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 988928639, now seen corresponding path program 2 times [2022-01-18 06:16:55,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956130370] [2022-01-18 06:16:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:55,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956130370] [2022-01-18 06:16:55,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956130370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:55,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:55,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:16:55,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355182236] [2022-01-18 06:16:55,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:55,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:16:55,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:16:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:16:55,517 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:55,613 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2022-01-18 06:16:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:16:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:16:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:55,619 INFO L225 Difference]: With dead ends: 450 [2022-01-18 06:16:55,619 INFO L226 Difference]: Without dead ends: 450 [2022-01-18 06:16:55,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:16:55,626 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:55,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-18 06:16:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2022-01-18 06:16:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2022-01-18 06:16:55,667 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2022-01-18 06:16:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2022-01-18 06:16:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2022-01-18 06:16:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:16:55,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:55,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:55,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:16:55,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash 901635393, now seen corresponding path program 3 times [2022-01-18 06:16:55,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:55,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584213615] [2022-01-18 06:16:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:55,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:55,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:55,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584213615] [2022-01-18 06:16:55,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584213615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:55,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:55,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:16:55,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855443124] [2022-01-18 06:16:55,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:55,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:16:55,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:16:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:16:55,727 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:55,785 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2022-01-18 06:16:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:16:55,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:16:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:55,788 INFO L225 Difference]: With dead ends: 349 [2022-01-18 06:16:55,788 INFO L226 Difference]: Without dead ends: 345 [2022-01-18 06:16:55,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:16:55,797 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:55,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:16:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-18 06:16:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2022-01-18 06:16:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2022-01-18 06:16:55,817 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2022-01-18 06:16:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2022-01-18 06:16:55,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2022-01-18 06:16:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 06:16:55,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:55,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:55,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 06:16:55,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash 938496605, now seen corresponding path program 1 times [2022-01-18 06:16:55,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43983321] [2022-01-18 06:16:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:55,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:55,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43983321] [2022-01-18 06:16:55,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43983321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:55,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:55,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:16:55,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932644864] [2022-01-18 06:16:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:55,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:16:55,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:16:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:16:55,850 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:55,918 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2022-01-18 06:16:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:16:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 06:16:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:55,922 INFO L225 Difference]: With dead ends: 345 [2022-01-18 06:16:55,923 INFO L226 Difference]: Without dead ends: 307 [2022-01-18 06:16:55,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:16:55,926 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:55,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 21 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-18 06:16:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2022-01-18 06:16:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2022-01-18 06:16:55,938 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2022-01-18 06:16:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:55,938 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2022-01-18 06:16:55,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2022-01-18 06:16:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 06:16:55,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:55,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:55,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 06:16:55,940 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1599468323, now seen corresponding path program 2 times [2022-01-18 06:16:55,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163749825] [2022-01-18 06:16:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:55,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:55,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163749825] [2022-01-18 06:16:55,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163749825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:16:55,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:16:55,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:16:55,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140626661] [2022-01-18 06:16:55,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:16:55,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:16:55,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:16:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:16:55,986 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:56,016 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2022-01-18 06:16:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:16:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 06:16:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:56,018 INFO L225 Difference]: With dead ends: 257 [2022-01-18 06:16:56,018 INFO L226 Difference]: Without dead ends: 241 [2022-01-18 06:16:56,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:16:56,020 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:56,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:16:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-18 06:16:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2022-01-18 06:16:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2022-01-18 06:16:56,030 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2022-01-18 06:16:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:56,030 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2022-01-18 06:16:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2022-01-18 06:16:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:16:56,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:56,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:16:56,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 06:16:56,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1736700641, now seen corresponding path program 1 times [2022-01-18 06:16:56,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683219131] [2022-01-18 06:16:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:56,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683219131] [2022-01-18 06:16:56,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683219131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:16:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011227810] [2022-01-18 06:16:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:56,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:56,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:16:56,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:16:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:16:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:16:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:16:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011227810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:16:56,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:16:56,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 06:16:56,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406503190] [2022-01-18 06:16:56,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:16:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:16:56,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:16:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:16:56,357 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-01-18 06:16:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:56,447 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2022-01-18 06:16:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:16:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 20 [2022-01-18 06:16:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:56,449 INFO L225 Difference]: With dead ends: 295 [2022-01-18 06:16:56,449 INFO L226 Difference]: Without dead ends: 295 [2022-01-18 06:16:56,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:16:56,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:56,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-18 06:16:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2022-01-18 06:16:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-01-18 06:16:56,469 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2022-01-18 06:16:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:56,470 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-01-18 06:16:56,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-01-18 06:16:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-01-18 06:16:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 06:16:56,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:56,471 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] [2022-01-18 06:16:56,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:16:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:56,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 345358593, now seen corresponding path program 1 times [2022-01-18 06:16:56,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894821927] [2022-01-18 06:16:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:56,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894821927] [2022-01-18 06:16:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894821927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:16:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511550614] [2022-01-18 06:16:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:56,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:56,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:56,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:16:56,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:16:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:16:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:16:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:16:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:16:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511550614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:16:56,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:16:56,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-01-18 06:16:56,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600238769] [2022-01-18 06:16:56,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:16:56,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:16:56,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:16:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:16:56,948 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:57,044 INFO L93 Difference]: Finished difference Result 288 states and 873 transitions. [2022-01-18 06:16:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 06:16:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 06:16:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:57,047 INFO L225 Difference]: With dead ends: 288 [2022-01-18 06:16:57,047 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 06:16:57,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:16:57,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:57,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 06:16:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 215. [2022-01-18 06:16:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-01-18 06:16:57,056 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-01-18 06:16:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:57,056 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-01-18 06:16:57,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-01-18 06:16:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:16:57,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:57,058 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] [2022-01-18 06:16:57,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:16:57,272 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,SelfDestructingSolverStorable7 [2022-01-18 06:16:57,273 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash -41937549, now seen corresponding path program 1 times [2022-01-18 06:16:57,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:57,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264044997] [2022-01-18 06:16:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:57,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:57,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264044997] [2022-01-18 06:16:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264044997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:16:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996429283] [2022-01-18 06:16:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:57,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:57,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:16:57,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:16:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:16:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:16:57,742 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 18 treesize of output 14 [2022-01-18 06:16:57,748 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 20 treesize of output 16 [2022-01-18 06:16:57,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 06:16:57,809 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 13 treesize of output 9 [2022-01-18 06:16:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:16:57,934 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 31 treesize of output 29 [2022-01-18 06:16:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:16:58,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:16:58,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 23 [2022-01-18 06:16:58,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:16:58,025 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 19 [2022-01-18 06:16:58,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 06:16:58,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:16:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996429283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:16:58,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:16:58,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:16:58,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809073988] [2022-01-18 06:16:58,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:16:58,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:16:58,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:16:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:16:58,147 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:58,266 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2022-01-18 06:16:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:16:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 06:16:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:58,270 INFO L225 Difference]: With dead ends: 476 [2022-01-18 06:16:58,270 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 06:16:58,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:16:58,272 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:58,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 06:16:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2022-01-18 06:16:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-01-18 06:16:58,284 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-01-18 06:16:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:58,285 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-01-18 06:16:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-01-18 06:16:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:16:58,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:58,287 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] [2022-01-18 06:16:58,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:16:58,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:58,504 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1347256959, now seen corresponding path program 2 times [2022-01-18 06:16:58,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177098137] [2022-01-18 06:16:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:58,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:58,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177098137] [2022-01-18 06:16:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177098137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:16:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060314983] [2022-01-18 06:16:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:16:58,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:58,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:16:58,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:16:58,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:16:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:16:58,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:16:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:16:58,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:16:58,904 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 19 treesize of output 15 [2022-01-18 06:16:58,956 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 24 treesize of output 18 [2022-01-18 06:16:58,959 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 20 treesize of output 14 [2022-01-18 06:16:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:59,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:16:59,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:16:59,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 30 [2022-01-18 06:16:59,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:16:59,115 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 21 treesize of output 26 [2022-01-18 06:16:59,119 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 33 treesize of output 31 [2022-01-18 06:16:59,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:16:59,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 06:16:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:16:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060314983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:16:59,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:16:59,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:16:59,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592814446] [2022-01-18 06:16:59,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:16:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:16:59,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:16:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:16:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:16:59,264 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:16:59,393 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2022-01-18 06:16:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:16:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 06:16:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:16:59,396 INFO L225 Difference]: With dead ends: 517 [2022-01-18 06:16:59,396 INFO L226 Difference]: Without dead ends: 490 [2022-01-18 06:16:59,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:16:59,397 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:16:59,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 73 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:16:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-18 06:16:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2022-01-18 06:16:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-01-18 06:16:59,410 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-01-18 06:16:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:16:59,410 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-01-18 06:16:59,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:16:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-01-18 06:16:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:16:59,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:16:59,412 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] [2022-01-18 06:16:59,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 06:16:59,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:59,621 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:16:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:16:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 228461667, now seen corresponding path program 3 times [2022-01-18 06:16:59,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:16:59,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890348531] [2022-01-18 06:16:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:16:59,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:16:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:16:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:16:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:16:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890348531] [2022-01-18 06:16:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890348531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:16:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597895243] [2022-01-18 06:16:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:16:59,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:16:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:16:59,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:16:59,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:16:59,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:16:59,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:16:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:16:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:16:59,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:17:00,043 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 21 treesize of output 17 [2022-01-18 06:17:00,046 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 11 [2022-01-18 06:17:00,063 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 19 treesize of output 15 [2022-01-18 06:17:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:00,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:00,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:00,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-01-18 06:17:00,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:00,200 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 20 treesize of output 25 [2022-01-18 06:17:00,204 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 31 treesize of output 29 [2022-01-18 06:17:00,248 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:17:00,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 06:17:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:00,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597895243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:00,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:00,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:17:00,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559480164] [2022-01-18 06:17:00,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:00,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:17:00,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:17:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:17:00,327 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:00,475 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2022-01-18 06:17:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:17:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 06:17:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:00,479 INFO L225 Difference]: With dead ends: 572 [2022-01-18 06:17:00,479 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 06:17:00,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:17:00,480 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:00,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 97 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 06:17:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2022-01-18 06:17:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-01-18 06:17:00,493 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-01-18 06:17:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:00,493 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-01-18 06:17:00,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-01-18 06:17:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:00,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:00,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:00,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:00,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 06:17:00,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1894937297, now seen corresponding path program 4 times [2022-01-18 06:17:00,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161638949] [2022-01-18 06:17:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:00,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:00,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161638949] [2022-01-18 06:17:00,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161638949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:00,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849271218] [2022-01-18 06:17:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:17:00,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:00,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:17:00,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:17:00,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:00,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:00,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849271218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:00,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:00,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:17:00,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982424627] [2022-01-18 06:17:00,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:00,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:17:00,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:17:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:17:00,982 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:01,120 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2022-01-18 06:17:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:17:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:01,126 INFO L225 Difference]: With dead ends: 886 [2022-01-18 06:17:01,126 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 06:17:01,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:17:01,127 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:01,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 06:17:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2022-01-18 06:17:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2022-01-18 06:17:01,145 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2022-01-18 06:17:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:01,145 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2022-01-18 06:17:01,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2022-01-18 06:17:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:01,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:01,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:01,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:01,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:01,368 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash -595223613, now seen corresponding path program 5 times [2022-01-18 06:17:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225967814] [2022-01-18 06:17:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:01,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:01,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225967814] [2022-01-18 06:17:01,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225967814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240394137] [2022-01-18 06:17:01,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:17:01,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:01,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:01,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:17:01,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:17:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:01,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:01,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240394137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:01,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 06:17:01,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330763270] [2022-01-18 06:17:01,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:01,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:17:01,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:17:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:17:01,607 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:02,601 INFO L93 Difference]: Finished difference Result 1033 states and 3239 transitions. [2022-01-18 06:17:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:17:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:02,606 INFO L225 Difference]: With dead ends: 1033 [2022-01-18 06:17:02,606 INFO L226 Difference]: Without dead ends: 1033 [2022-01-18 06:17:02,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:17:02,607 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:02,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 85 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:17:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-18 06:17:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 646. [2022-01-18 06:17:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.2496124031007754) internal successors, (2096), 645 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2096 transitions. [2022-01-18 06:17:02,628 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2096 transitions. Word has length 25 [2022-01-18 06:17:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:02,628 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2096 transitions. [2022-01-18 06:17:02,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2096 transitions. [2022-01-18 06:17:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:02,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:02,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:02,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 06:17:02,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:02,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1959818837, now seen corresponding path program 6 times [2022-01-18 06:17:02,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:02,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511959609] [2022-01-18 06:17:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:02,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:02,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511959609] [2022-01-18 06:17:02,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511959609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777046585] [2022-01-18 06:17:02,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:17:02,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:02,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:02,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:02,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:17:02,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:17:02,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:17:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:02,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:03,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777046585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:03,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:03,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:17:03,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059875686] [2022-01-18 06:17:03,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:03,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:17:03,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:17:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:17:03,019 INFO L87 Difference]: Start difference. First operand 646 states and 2096 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:03,529 INFO L93 Difference]: Finished difference Result 2177 states and 6995 transitions. [2022-01-18 06:17:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:17:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:03,543 INFO L225 Difference]: With dead ends: 2177 [2022-01-18 06:17:03,544 INFO L226 Difference]: Without dead ends: 2151 [2022-01-18 06:17:03,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:17:03,545 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:03,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 73 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:17:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-01-18 06:17:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1034. [2022-01-18 06:17:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.478218780251694) internal successors, (3593), 1033 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3593 transitions. [2022-01-18 06:17:03,588 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3593 transitions. Word has length 25 [2022-01-18 06:17:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:03,588 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3593 transitions. [2022-01-18 06:17:03,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3593 transitions. [2022-01-18 06:17:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:03,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:03,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:03,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:03,819 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,SelfDestructingSolverStorable13 [2022-01-18 06:17:03,819 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash -131125633, now seen corresponding path program 7 times [2022-01-18 06:17:03,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:03,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353822630] [2022-01-18 06:17:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:03,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:03,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:03,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353822630] [2022-01-18 06:17:03,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353822630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999989242] [2022-01-18 06:17:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:17:03,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:03,862 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:03,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:17:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:03,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999989242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:03,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:03,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:17:03,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652022103] [2022-01-18 06:17:03,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:03,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:17:03,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:17:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:17:03,979 INFO L87 Difference]: Start difference. First operand 1034 states and 3593 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:04,070 INFO L93 Difference]: Finished difference Result 1476 states and 4927 transitions. [2022-01-18 06:17:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:17:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:04,078 INFO L225 Difference]: With dead ends: 1476 [2022-01-18 06:17:04,078 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 06:17:04,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:17:04,080 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:04,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 06:17:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1051. [2022-01-18 06:17:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.4647619047619047) internal successors, (3638), 1050 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3638 transitions. [2022-01-18 06:17:04,113 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3638 transitions. Word has length 25 [2022-01-18 06:17:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:04,113 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3638 transitions. [2022-01-18 06:17:04,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3638 transitions. [2022-01-18 06:17:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:04,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:04,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:04,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:04,339 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,SelfDestructingSolverStorable14 [2022-01-18 06:17:04,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1794697629, now seen corresponding path program 8 times [2022-01-18 06:17:04,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886147886] [2022-01-18 06:17:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:04,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:04,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886147886] [2022-01-18 06:17:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886147886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392055326] [2022-01-18 06:17:04,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:17:04,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:04,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:04,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:17:04,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:17:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:04,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392055326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:04,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:04,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:17:04,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63461886] [2022-01-18 06:17:04,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:04,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:17:04,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:17:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:17:04,526 INFO L87 Difference]: Start difference. First operand 1051 states and 3638 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:04,641 INFO L93 Difference]: Finished difference Result 1980 states and 6727 transitions. [2022-01-18 06:17:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:17:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:04,653 INFO L225 Difference]: With dead ends: 1980 [2022-01-18 06:17:04,654 INFO L226 Difference]: Without dead ends: 1968 [2022-01-18 06:17:04,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:17:04,654 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:04,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 84 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-01-18 06:17:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1297. [2022-01-18 06:17:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.580246913580247) internal successors, (4640), 1296 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4640 transitions. [2022-01-18 06:17:04,696 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4640 transitions. Word has length 25 [2022-01-18 06:17:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:04,696 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4640 transitions. [2022-01-18 06:17:04,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4640 transitions. [2022-01-18 06:17:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:04,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:04,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:04,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:04,925 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,SelfDestructingSolverStorable15 [2022-01-18 06:17:04,925 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -675454435, now seen corresponding path program 9 times [2022-01-18 06:17:04,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:04,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523294177] [2022-01-18 06:17:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:04,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:04,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523294177] [2022-01-18 06:17:04,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523294177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919839756] [2022-01-18 06:17:04,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:17:04,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:04,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:04,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:17:04,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:17:04,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:05,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919839756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:05,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:05,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:17:05,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272044870] [2022-01-18 06:17:05,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:05,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:17:05,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:17:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:17:05,089 INFO L87 Difference]: Start difference. First operand 1297 states and 4640 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:05,200 INFO L93 Difference]: Finished difference Result 2951 states and 10415 transitions. [2022-01-18 06:17:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:17:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:05,217 INFO L225 Difference]: With dead ends: 2951 [2022-01-18 06:17:05,217 INFO L226 Difference]: Without dead ends: 2945 [2022-01-18 06:17:05,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:17:05,218 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:05,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 41 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2022-01-18 06:17:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2000. [2022-01-18 06:17:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.773886943471736) internal successors, (7544), 1999 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7544 transitions. [2022-01-18 06:17:05,283 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7544 transitions. Word has length 25 [2022-01-18 06:17:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:05,283 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 7544 transitions. [2022-01-18 06:17:05,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7544 transitions. [2022-01-18 06:17:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:17:05,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:05,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:05,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:05,508 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,SelfDestructingSolverStorable16 [2022-01-18 06:17:05,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1549423517, now seen corresponding path program 10 times [2022-01-18 06:17:05,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:05,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477166567] [2022-01-18 06:17:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:05,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:05,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477166567] [2022-01-18 06:17:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477166567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605928101] [2022-01-18 06:17:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:17:05,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:05,537 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:05,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:17:05,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:17:05,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:05,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:05,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605928101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:05,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:05,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:17:05,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853706927] [2022-01-18 06:17:05,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:05,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:17:05,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:17:05,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:17:05,659 INFO L87 Difference]: Start difference. First operand 2000 states and 7544 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:05,761 INFO L93 Difference]: Finished difference Result 2777 states and 9915 transitions. [2022-01-18 06:17:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:17:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:17:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:05,772 INFO L225 Difference]: With dead ends: 2777 [2022-01-18 06:17:05,772 INFO L226 Difference]: Without dead ends: 2759 [2022-01-18 06:17:05,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:17:05,773 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:05,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-01-18 06:17:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1995. [2022-01-18 06:17:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.7703109327983952) internal successors, (7518), 1994 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7518 transitions. [2022-01-18 06:17:05,834 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7518 transitions. Word has length 25 [2022-01-18 06:17:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 7518 transitions. [2022-01-18 06:17:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7518 transitions. [2022-01-18 06:17:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:17:05,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:05,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:05,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:06,066 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,SelfDestructingSolverStorable17 [2022-01-18 06:17:06,067 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:06,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584555, now seen corresponding path program 11 times [2022-01-18 06:17:06,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:06,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536829654] [2022-01-18 06:17:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:06,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:06,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536829654] [2022-01-18 06:17:06,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536829654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985534317] [2022-01-18 06:17:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:17:06,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:06,096 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:06,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:17:06,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:17:06,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:17:06,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:06,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:06,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985534317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:06,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:06,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:17:06,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501437135] [2022-01-18 06:17:06,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:06,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:17:06,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:17:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:17:06,242 INFO L87 Difference]: Start difference. First operand 1995 states and 7518 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:06,629 INFO L93 Difference]: Finished difference Result 4088 states and 14079 transitions. [2022-01-18 06:17:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:17:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:17:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:06,641 INFO L225 Difference]: With dead ends: 4088 [2022-01-18 06:17:06,642 INFO L226 Difference]: Without dead ends: 3536 [2022-01-18 06:17:06,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:17:06,643 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:06,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 107 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:17:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-01-18 06:17:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2540. [2022-01-18 06:17:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 3.588814493895234) internal successors, (9112), 2539 states have internal predecessors, (9112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 9112 transitions. [2022-01-18 06:17:06,719 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 9112 transitions. Word has length 26 [2022-01-18 06:17:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 9112 transitions. [2022-01-18 06:17:06,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 9112 transitions. [2022-01-18 06:17:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:17:06,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:06,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:06,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:06,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:06,951 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash 226713273, now seen corresponding path program 12 times [2022-01-18 06:17:06,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446480974] [2022-01-18 06:17:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:06,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:06,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:06,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446480974] [2022-01-18 06:17:06,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446480974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:06,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56160761] [2022-01-18 06:17:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:17:06,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:06,980 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:06,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:17:07,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:17:07,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:07,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:07,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:07,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56160761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:07,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:07,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:17:07,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724907184] [2022-01-18 06:17:07,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:07,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:17:07,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:07,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:17:07,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:17:07,122 INFO L87 Difference]: Start difference. First operand 2540 states and 9112 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:07,232 INFO L93 Difference]: Finished difference Result 5012 states and 17668 transitions. [2022-01-18 06:17:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:17:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:17:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:07,251 INFO L225 Difference]: With dead ends: 5012 [2022-01-18 06:17:07,251 INFO L226 Difference]: Without dead ends: 4982 [2022-01-18 06:17:07,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:17:07,252 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:07,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-01-18 06:17:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3891. [2022-01-18 06:17:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 3.6817480719794347) internal successors, (14322), 3890 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 14322 transitions. [2022-01-18 06:17:07,397 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 14322 transitions. Word has length 28 [2022-01-18 06:17:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:07,397 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 14322 transitions. [2022-01-18 06:17:07,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 14322 transitions. [2022-01-18 06:17:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:17:07,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:07,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:07,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:07,632 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1762243953, now seen corresponding path program 13 times [2022-01-18 06:17:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:07,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254105604] [2022-01-18 06:17:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:07,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:07,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254105604] [2022-01-18 06:17:07,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254105604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142312348] [2022-01-18 06:17:07,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:17:07,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:07,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:07,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:07,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:17:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:07,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142312348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:07,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:07,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 06:17:07,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014421120] [2022-01-18 06:17:07,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 06:17:07,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 06:17:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:17:07,806 INFO L87 Difference]: Start difference. First operand 3891 states and 14322 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:08,192 INFO L93 Difference]: Finished difference Result 9890 states and 33297 transitions. [2022-01-18 06:17:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:17:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:17:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:08,228 INFO L225 Difference]: With dead ends: 9890 [2022-01-18 06:17:08,228 INFO L226 Difference]: Without dead ends: 9836 [2022-01-18 06:17:08,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:17:08,229 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:08,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 131 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:17:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-01-18 06:17:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 6083. [2022-01-18 06:17:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 3.672640578756988) internal successors, (22337), 6082 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 22337 transitions. [2022-01-18 06:17:08,431 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 22337 transitions. Word has length 28 [2022-01-18 06:17:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:08,432 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 22337 transitions. [2022-01-18 06:17:08,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 22337 transitions. [2022-01-18 06:17:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:17:08,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:08,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:08,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:08,663 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2006057489, now seen corresponding path program 14 times [2022-01-18 06:17:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686308372] [2022-01-18 06:17:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:08,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:08,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686308372] [2022-01-18 06:17:08,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686308372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782073329] [2022-01-18 06:17:08,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:17:08,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:08,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:08,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:17:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:17:08,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:08,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:08,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782073329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:08,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:08,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:17:08,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814112109] [2022-01-18 06:17:08,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:08,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:17:08,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:17:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:17:08,837 INFO L87 Difference]: Start difference. First operand 6083 states and 22337 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:08,968 INFO L93 Difference]: Finished difference Result 8194 states and 29343 transitions. [2022-01-18 06:17:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:17:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2022-01-18 06:17:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:08,995 INFO L225 Difference]: With dead ends: 8194 [2022-01-18 06:17:08,995 INFO L226 Difference]: Without dead ends: 8152 [2022-01-18 06:17:08,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:17:08,996 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:08,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:17:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2022-01-18 06:17:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 7162. [2022-01-18 06:17:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.697807568775311) internal successors, (26480), 7161 states have internal predecessors, (26480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 26480 transitions. [2022-01-18 06:17:09,209 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 26480 transitions. Word has length 28 [2022-01-18 06:17:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 26480 transitions. [2022-01-18 06:17:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 26480 transitions. [2022-01-18 06:17:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:17:09,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:09,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:17:09,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 06:17:09,451 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -753379127, now seen corresponding path program 15 times [2022-01-18 06:17:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253269361] [2022-01-18 06:17:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:09,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:09,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253269361] [2022-01-18 06:17:09,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253269361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60074056] [2022-01-18 06:17:09,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:17:09,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:09,481 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:09,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:17:09,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:17:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:17:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:09,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:17:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60074056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:09,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:09,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:17:09,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444385200] [2022-01-18 06:17:09,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:09,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:17:09,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:17:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:17:09,639 INFO L87 Difference]: Start difference. First operand 7162 states and 26480 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:10,037 INFO L93 Difference]: Finished difference Result 11815 states and 40319 transitions. [2022-01-18 06:17:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:17:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:17:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:10,074 INFO L225 Difference]: With dead ends: 11815 [2022-01-18 06:17:10,075 INFO L226 Difference]: Without dead ends: 11657 [2022-01-18 06:17:10,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:17:10,075 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:10,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:17:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2022-01-18 06:17:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 9193. [2022-01-18 06:17:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.609769364664926) internal successors, (33181), 9192 states have internal predecessors, (33181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33181 transitions. [2022-01-18 06:17:10,412 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33181 transitions. Word has length 28 [2022-01-18 06:17:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:10,413 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33181 transitions. [2022-01-18 06:17:10,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33181 transitions. [2022-01-18 06:17:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:10,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:10,435 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] [2022-01-18 06:17:10,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:10,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:10,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1894836115, now seen corresponding path program 16 times [2022-01-18 06:17:10,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:10,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747532281] [2022-01-18 06:17:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:10,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:10,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:10,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747532281] [2022-01-18 06:17:10,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747532281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:10,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131387861] [2022-01-18 06:17:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:17:10,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:10,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:11,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:17:11,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:17:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:11,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:17:11,426 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 33 treesize of output 25 [2022-01-18 06:17:11,430 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 28 treesize of output 20 [2022-01-18 06:17:11,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-01-18 06:17:11,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-18 06:17:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:11,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:11,692 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:17:11,693 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 518 treesize of output 486 [2022-01-18 06:17:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:11,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:11,917 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:11,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:17:11,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:11,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:11,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:11,943 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 26 treesize of output 55 [2022-01-18 06:17:12,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:12,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:12,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:12,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:12,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:12,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:12,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131387861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:12,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:12,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:17:12,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752684106] [2022-01-18 06:17:12,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:12,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:17:12,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:17:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:17:12,203 INFO L87 Difference]: Start difference. First operand 9193 states and 33181 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:13,098 INFO L93 Difference]: Finished difference Result 12792 states and 45116 transitions. [2022-01-18 06:17:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:17:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:13,157 INFO L225 Difference]: With dead ends: 12792 [2022-01-18 06:17:13,157 INFO L226 Difference]: Without dead ends: 12771 [2022-01-18 06:17:13,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:17:13,158 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 224 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:13,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 200 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:17:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2022-01-18 06:17:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 9338. [2022-01-18 06:17:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9337 states have (on average 3.6080111384813107) internal successors, (33688), 9337 states have internal predecessors, (33688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33688 transitions. [2022-01-18 06:17:13,379 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33688 transitions. Word has length 30 [2022-01-18 06:17:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:13,380 INFO L470 AbstractCegarLoop]: Abstraction has 9338 states and 33688 transitions. [2022-01-18 06:17:13,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33688 transitions. [2022-01-18 06:17:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:13,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:13,402 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] [2022-01-18 06:17:13,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:13,627 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1216905027, now seen corresponding path program 17 times [2022-01-18 06:17:13,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171725444] [2022-01-18 06:17:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:13,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:13,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171725444] [2022-01-18 06:17:13,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171725444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002496185] [2022-01-18 06:17:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:17:13,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:13,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:13,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:17:13,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:17:13,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:14,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:17:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:17:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-18 06:17:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:14,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-01-18 06:17:14,494 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 32 treesize of output 20 [2022-01-18 06:17:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:14,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:14,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:14,701 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 445 treesize of output 413 [2022-01-18 06:17:15,141 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:17:15,142 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 72 treesize of output 97 [2022-01-18 06:17:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:15,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:15,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 77 [2022-01-18 06:17:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002496185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:15,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 06:17:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963154047] [2022-01-18 06:17:15,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:15,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:17:15,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:17:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:17:15,641 INFO L87 Difference]: Start difference. First operand 9338 states and 33688 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:17,223 INFO L93 Difference]: Finished difference Result 9951 states and 35487 transitions. [2022-01-18 06:17:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:17:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:17,255 INFO L225 Difference]: With dead ends: 9951 [2022-01-18 06:17:17,255 INFO L226 Difference]: Without dead ends: 9924 [2022-01-18 06:17:17,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:17:17,256 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:17,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 322 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1300 Invalid, 0 Unknown, 632 Unchecked, 0.8s Time] [2022-01-18 06:17:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2022-01-18 06:17:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 9370. [2022-01-18 06:17:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9370 states, 9369 states have (on average 3.604653644999466) internal successors, (33772), 9369 states have internal predecessors, (33772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9370 states to 9370 states and 33772 transitions. [2022-01-18 06:17:17,467 INFO L78 Accepts]: Start accepts. Automaton has 9370 states and 33772 transitions. Word has length 30 [2022-01-18 06:17:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:17,467 INFO L470 AbstractCegarLoop]: Abstraction has 9370 states and 33772 transitions. [2022-01-18 06:17:17,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states and 33772 transitions. [2022-01-18 06:17:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:17,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:17,483 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] [2022-01-18 06:17:17,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:17,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:17,684 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1367781517, now seen corresponding path program 18 times [2022-01-18 06:17:17,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152178640] [2022-01-18 06:17:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:17,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:18,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152178640] [2022-01-18 06:17:18,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152178640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517166823] [2022-01-18 06:17:18,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:17:18,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:18,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:18,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:18,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:17:18,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:17:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:18,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:18,367 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 35 treesize of output 27 [2022-01-18 06:17:18,370 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 28 treesize of output 20 [2022-01-18 06:17:18,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-01-18 06:17:18,422 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 22 treesize of output 14 [2022-01-18 06:17:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:18,607 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:17:18,607 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 614 treesize of output 582 [2022-01-18 06:17:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:18,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:18,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,787 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:18,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:17:18,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:18,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-01-18 06:17:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:18,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:18,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:19,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517166823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:19,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:19,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:17:19,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348353779] [2022-01-18 06:17:19,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:19,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:17:19,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:17:19,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:17:19,037 INFO L87 Difference]: Start difference. First operand 9370 states and 33772 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:20,086 INFO L93 Difference]: Finished difference Result 13421 states and 47075 transitions. [2022-01-18 06:17:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 06:17:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:20,125 INFO L225 Difference]: With dead ends: 13421 [2022-01-18 06:17:20,125 INFO L226 Difference]: Without dead ends: 13367 [2022-01-18 06:17:20,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:17:20,126 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:20,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 189 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:17:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13367 states. [2022-01-18 06:17:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13367 to 9537. [2022-01-18 06:17:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9536 states have (on average 3.606753355704698) internal successors, (34394), 9536 states have internal predecessors, (34394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 34394 transitions. [2022-01-18 06:17:20,330 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 34394 transitions. Word has length 30 [2022-01-18 06:17:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:20,330 INFO L470 AbstractCegarLoop]: Abstraction has 9537 states and 34394 transitions. [2022-01-18 06:17:20,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 34394 transitions. [2022-01-18 06:17:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:20,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:20,347 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] [2022-01-18 06:17:20,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:20,547 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,SelfDestructingSolverStorable25 [2022-01-18 06:17:20,547 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash 782322175, now seen corresponding path program 19 times [2022-01-18 06:17:20,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681809253] [2022-01-18 06:17:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:20,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:20,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681809253] [2022-01-18 06:17:20,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681809253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549438370] [2022-01-18 06:17:20,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:17:20,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:20,868 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:20,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:17:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:21,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:21,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:21,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-01-18 06:17:21,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-01-18 06:17:21,348 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 32 treesize of output 24 [2022-01-18 06:17:21,352 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 27 treesize of output 19 [2022-01-18 06:17:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:21,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:21,528 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:17:21,528 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 614 treesize of output 582 [2022-01-18 06:17:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:21,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:21,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,680 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:21,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:17:21,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:21,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-01-18 06:17:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:21,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:21,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:21,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549438370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:21,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:21,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 06:17:21,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215158975] [2022-01-18 06:17:21,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:21,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:17:21,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:21,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:17:21,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:17:21,864 INFO L87 Difference]: Start difference. First operand 9537 states and 34394 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:23,176 INFO L93 Difference]: Finished difference Result 13632 states and 47787 transitions. [2022-01-18 06:17:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:17:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:23,263 INFO L225 Difference]: With dead ends: 13632 [2022-01-18 06:17:23,263 INFO L226 Difference]: Without dead ends: 13611 [2022-01-18 06:17:23,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:17:23,264 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 194 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:23,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 347 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:17:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13611 states. [2022-01-18 06:17:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13611 to 9566. [2022-01-18 06:17:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9566 states, 9565 states have (on average 3.6065865133298485) internal successors, (34497), 9565 states have internal predecessors, (34497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9566 states to 9566 states and 34497 transitions. [2022-01-18 06:17:23,473 INFO L78 Accepts]: Start accepts. Automaton has 9566 states and 34497 transitions. Word has length 30 [2022-01-18 06:17:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:23,473 INFO L470 AbstractCegarLoop]: Abstraction has 9566 states and 34497 transitions. [2022-01-18 06:17:23,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9566 states and 34497 transitions. [2022-01-18 06:17:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:23,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:23,488 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] [2022-01-18 06:17:23,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:23,699 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,SelfDestructingSolverStorable26 [2022-01-18 06:17:23,700 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -336473117, now seen corresponding path program 20 times [2022-01-18 06:17:23,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633836434] [2022-01-18 06:17:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:23,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:24,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633836434] [2022-01-18 06:17:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633836434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842620728] [2022-01-18 06:17:24,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:17:24,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:24,028 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:24,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:17:24,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:17:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:24,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:24,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-01-18 06:17:24,452 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 30 treesize of output 22 [2022-01-18 06:17:24,455 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 27 treesize of output 19 [2022-01-18 06:17:24,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:17:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:24,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:24,649 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:17:24,650 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 614 treesize of output 582 [2022-01-18 06:17:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:24,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:24,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:24,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:24,818 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:24,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:17:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:24,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:24,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:24,843 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 26 treesize of output 55 [2022-01-18 06:17:25,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:25,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:25,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:25,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:25,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842620728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:25,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 06:17:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148528899] [2022-01-18 06:17:25,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:25,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:17:25,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:17:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:17:25,081 INFO L87 Difference]: Start difference. First operand 9566 states and 34497 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:26,511 INFO L93 Difference]: Finished difference Result 13438 states and 47172 transitions. [2022-01-18 06:17:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:17:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:26,543 INFO L225 Difference]: With dead ends: 13438 [2022-01-18 06:17:26,544 INFO L226 Difference]: Without dead ends: 13417 [2022-01-18 06:17:26,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:17:26,544 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 205 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:26,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 352 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:17:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13417 states. [2022-01-18 06:17:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13417 to 9556. [2022-01-18 06:17:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 9555 states have (on average 3.6063840920983776) internal successors, (34459), 9555 states have internal predecessors, (34459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 34459 transitions. [2022-01-18 06:17:26,766 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 34459 transitions. Word has length 30 [2022-01-18 06:17:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:26,766 INFO L470 AbstractCegarLoop]: Abstraction has 9556 states and 34459 transitions. [2022-01-18 06:17:26,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 34459 transitions. [2022-01-18 06:17:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:26,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:26,781 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] [2022-01-18 06:17:26,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 06:17:26,982 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,SelfDestructingSolverStorable27 [2022-01-18 06:17:26,982 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 418455901, now seen corresponding path program 21 times [2022-01-18 06:17:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249094914] [2022-01-18 06:17:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:26,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:27,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249094914] [2022-01-18 06:17:27,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249094914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052620598] [2022-01-18 06:17:27,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:17:27,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:27,255 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:27,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:17:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:17:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:17:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:27,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:17:27,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:27,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2022-01-18 06:17:27,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:27,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 61 [2022-01-18 06:17:27,617 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 06:17:27,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 06:17:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:27,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:27,859 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 26 treesize of output 26 [2022-01-18 06:17:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:27,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:28,474 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 113 treesize of output 109 [2022-01-18 06:17:28,746 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:17:28,747 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 73 treesize of output 98 [2022-01-18 06:17:28,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:28,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:28,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 78 [2022-01-18 06:17:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052620598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:29,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 06:17:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275038959] [2022-01-18 06:17:29,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:29,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:17:29,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:17:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:17:29,198 INFO L87 Difference]: Start difference. First operand 9556 states and 34459 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:34,194 INFO L93 Difference]: Finished difference Result 20722 states and 72136 transitions. [2022-01-18 06:17:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 06:17:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:34,248 INFO L225 Difference]: With dead ends: 20722 [2022-01-18 06:17:34,248 INFO L226 Difference]: Without dead ends: 20668 [2022-01-18 06:17:34,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1107, Invalid=9813, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:17:34,251 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 590 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2451 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 851 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2765 Invalid, 0 Unknown, 2451 Unchecked, 1.5s Time] [2022-01-18 06:17:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20668 states. [2022-01-18 06:17:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20668 to 9634. [2022-01-18 06:17:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9633 states have (on average 3.6039655351396243) internal successors, (34717), 9633 states have internal predecessors, (34717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 34717 transitions. [2022-01-18 06:17:34,538 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 34717 transitions. Word has length 30 [2022-01-18 06:17:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 34717 transitions. [2022-01-18 06:17:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 34717 transitions. [2022-01-18 06:17:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:34,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:34,552 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] [2022-01-18 06:17:34,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 06:17:34,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:34,753 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2138468893, now seen corresponding path program 22 times [2022-01-18 06:17:34,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:34,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366371069] [2022-01-18 06:17:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:34,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:34,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:34,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366371069] [2022-01-18 06:17:34,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366371069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911887901] [2022-01-18 06:17:34,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:17:34,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:34,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:34,974 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:34,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:17:35,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:17:35,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:17:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:35,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:35,285 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 33 treesize of output 25 [2022-01-18 06:17:35,287 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 28 treesize of output 20 [2022-01-18 06:17:35,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-01-18 06:17:35,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:17:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:35,522 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:17:35,522 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 2390 treesize of output 2294 [2022-01-18 06:17:36,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,404 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:36,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:17:36,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:36,424 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 26 treesize of output 55 [2022-01-18 06:17:36,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:36,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:36,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911887901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:36,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:17:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021931966] [2022-01-18 06:17:36,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:17:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:17:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:17:36,586 INFO L87 Difference]: Start difference. First operand 9634 states and 34717 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:37,848 INFO L93 Difference]: Finished difference Result 13699 states and 47972 transitions. [2022-01-18 06:17:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:17:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:37,876 INFO L225 Difference]: With dead ends: 13699 [2022-01-18 06:17:37,877 INFO L226 Difference]: Without dead ends: 13656 [2022-01-18 06:17:37,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:17:37,877 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:37,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 287 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:17:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2022-01-18 06:17:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 9867. [2022-01-18 06:17:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.5997364686803164) internal successors, (35515), 9866 states have internal predecessors, (35515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 35515 transitions. [2022-01-18 06:17:38,052 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 35515 transitions. Word has length 30 [2022-01-18 06:17:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 35515 transitions. [2022-01-18 06:17:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 35515 transitions. [2022-01-18 06:17:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:38,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:38,067 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] [2022-01-18 06:17:38,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 06:17:38,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:38,271 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash -586467713, now seen corresponding path program 23 times [2022-01-18 06:17:38,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:38,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335001648] [2022-01-18 06:17:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:38,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:38,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335001648] [2022-01-18 06:17:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335001648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264114665] [2022-01-18 06:17:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:17:38,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:38,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:38,564 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:38,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:17:38,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 06:17:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 06:17:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:38,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:38,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:38,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:17:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:39,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2022-01-18 06:17:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-18 06:17:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-01-18 06:17:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:39,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:39,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:39,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,916 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:17:39,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 90 [2022-01-18 06:17:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:39,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:39,935 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 53 treesize of output 70 [2022-01-18 06:17:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264114665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:40,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 06:17:40,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678590328] [2022-01-18 06:17:40,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:40,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:17:40,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:17:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:17:40,273 INFO L87 Difference]: Start difference. First operand 9867 states and 35515 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:17:49,655 INFO L93 Difference]: Finished difference Result 21914 states and 76487 transitions. [2022-01-18 06:17:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 06:17:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:17:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:17:49,705 INFO L225 Difference]: With dead ends: 21914 [2022-01-18 06:17:49,705 INFO L226 Difference]: Without dead ends: 21875 [2022-01-18 06:17:49,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2494, Invalid=18676, Unknown=0, NotChecked=0, Total=21170 [2022-01-18 06:17:49,709 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 487 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 6896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3947 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:17:49,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 876 Invalid, 6896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2846 Invalid, 0 Unknown, 3947 Unchecked, 1.7s Time] [2022-01-18 06:17:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21875 states. [2022-01-18 06:17:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21875 to 10145. [2022-01-18 06:17:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.597594637223975) internal successors, (36494), 10144 states have internal predecessors, (36494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 36494 transitions. [2022-01-18 06:17:49,972 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 36494 transitions. Word has length 30 [2022-01-18 06:17:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:17:49,972 INFO L470 AbstractCegarLoop]: Abstraction has 10145 states and 36494 transitions. [2022-01-18 06:17:49,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:17:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 36494 transitions. [2022-01-18 06:17:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:17:49,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:17:49,991 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] [2022-01-18 06:17:50,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:17:50,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-18 06:17:50,199 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:17:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:17:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1705263005, now seen corresponding path program 24 times [2022-01-18 06:17:50,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:17:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878840190] [2022-01-18 06:17:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:17:50,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:17:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:17:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:50,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:17:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878840190] [2022-01-18 06:17:50,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878840190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:17:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356240281] [2022-01-18 06:17:50,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:17:50,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:17:50,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:17:50,500 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:17:50,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:17:50,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 06:17:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:17:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:17:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:17:50,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:17:50,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 06:17:50,947 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 32 treesize of output 24 [2022-01-18 06:17:50,950 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 29 treesize of output 21 [2022-01-18 06:17:50,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:50,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2022-01-18 06:17:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:51,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:17:51,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:51,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:17:51,688 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 1149 treesize of output 1110 [2022-01-18 06:17:52,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:17:52,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:17:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 58 [2022-01-18 06:17:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:17:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:17:52,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2022-01-18 06:17:52,713 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-18 06:17:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:17:52,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356240281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:17:52,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:17:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-01-18 06:17:52,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171485292] [2022-01-18 06:17:52,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:17:52,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:17:52,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:17:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:17:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:17:52,805 INFO L87 Difference]: Start difference. First operand 10145 states and 36494 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:24,628 INFO L93 Difference]: Finished difference Result 25914 states and 90193 transitions. [2022-01-18 06:18:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-01-18 06:18:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:24,701 INFO L225 Difference]: With dead ends: 25914 [2022-01-18 06:18:24,701 INFO L226 Difference]: Without dead ends: 25884 [2022-01-18 06:18:24,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13960 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=3729, Invalid=31802, Unknown=1, NotChecked=0, Total=35532 [2022-01-18 06:18:24,705 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 573 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 6627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4690 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:24,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 776 Invalid, 6627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1814 Invalid, 0 Unknown, 4690 Unchecked, 1.2s Time] [2022-01-18 06:18:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2022-01-18 06:18:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 10509. [2022-01-18 06:18:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10509 states, 10508 states have (on average 3.586410354015988) internal successors, (37686), 10508 states have internal predecessors, (37686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10509 states to 10509 states and 37686 transitions. [2022-01-18 06:18:25,028 INFO L78 Accepts]: Start accepts. Automaton has 10509 states and 37686 transitions. Word has length 30 [2022-01-18 06:18:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:25,028 INFO L470 AbstractCegarLoop]: Abstraction has 10509 states and 37686 transitions. [2022-01-18 06:18:25,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10509 states and 37686 transitions. [2022-01-18 06:18:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:25,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:25,048 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] [2022-01-18 06:18:25,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:18:25,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 06:18:25,271 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash 66333555, now seen corresponding path program 25 times [2022-01-18 06:18:25,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750998119] [2022-01-18 06:18:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:25,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:25,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750998119] [2022-01-18 06:18:25,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750998119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132983741] [2022-01-18 06:18:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:18:25,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:25,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:25,564 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:25,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:18:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:25,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:18:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:25,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:18:25,936 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 34 treesize of output 26 [2022-01-18 06:18:25,941 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 29 treesize of output 21 [2022-01-18 06:18:25,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 06:18:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:26,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:26,150 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:26,151 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 2390 treesize of output 2294 [2022-01-18 06:18:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:26,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:26,959 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:18:26,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:18:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:26,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:26,979 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 26 treesize of output 55 [2022-01-18 06:18:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:27,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:18:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:27,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:18:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132983741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:27,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 06:18:27,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150508729] [2022-01-18 06:18:27,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:27,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:18:27,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:18:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:18:27,145 INFO L87 Difference]: Start difference. First operand 10509 states and 37686 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:28,637 INFO L93 Difference]: Finished difference Result 14830 states and 51892 transitions. [2022-01-18 06:18:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:18:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:28,674 INFO L225 Difference]: With dead ends: 14830 [2022-01-18 06:18:28,674 INFO L226 Difference]: Without dead ends: 14791 [2022-01-18 06:18:28,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:18:28,675 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 177 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:28,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 388 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:18:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14791 states. [2022-01-18 06:18:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14791 to 10482. [2022-01-18 06:18:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10482 states, 10481 states have (on average 3.5968896097700602) internal successors, (37699), 10481 states have internal predecessors, (37699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10482 states to 10482 states and 37699 transitions. [2022-01-18 06:18:28,877 INFO L78 Accepts]: Start accepts. Automaton has 10482 states and 37699 transitions. Word has length 30 [2022-01-18 06:18:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:28,877 INFO L470 AbstractCegarLoop]: Abstraction has 10482 states and 37699 transitions. [2022-01-18 06:18:28,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10482 states and 37699 transitions. [2022-01-18 06:18:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:28,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:28,894 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] [2022-01-18 06:18:28,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 06:18:29,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:29,095 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash 639992413, now seen corresponding path program 26 times [2022-01-18 06:18:29,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108747033] [2022-01-18 06:18:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:29,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:29,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108747033] [2022-01-18 06:18:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108747033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369696416] [2022-01-18 06:18:29,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:18:29,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:29,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:29,397 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:29,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:18:29,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:18:29,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:29,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:18:29,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 06:18:29,726 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 32 treesize of output 24 [2022-01-18 06:18:29,729 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 34 treesize of output 26 [2022-01-18 06:18:29,782 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 32 treesize of output 20 [2022-01-18 06:18:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:29,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:30,012 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:30,013 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 2390 treesize of output 2294 [2022-01-18 06:18:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:31,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,213 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:18:31,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 63 [2022-01-18 06:18:31,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:31,243 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 26 treesize of output 55 [2022-01-18 06:18:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:31,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-01-18 06:18:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:31,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:18:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:31,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369696416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:31,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:31,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 06:18:31,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567389076] [2022-01-18 06:18:31,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:31,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:18:31,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:31,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:18:31,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:18:31,431 INFO L87 Difference]: Start difference. First operand 10482 states and 37699 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:32,840 INFO L93 Difference]: Finished difference Result 14320 states and 50335 transitions. [2022-01-18 06:18:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:18:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:32,874 INFO L225 Difference]: With dead ends: 14320 [2022-01-18 06:18:32,874 INFO L226 Difference]: Without dead ends: 14281 [2022-01-18 06:18:32,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:18:32,875 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:32,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 395 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:18:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14281 states. [2022-01-18 06:18:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14281 to 10505. [2022-01-18 06:18:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 3.598153084539223) internal successors, (37795), 10504 states have internal predecessors, (37795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 37795 transitions. [2022-01-18 06:18:33,074 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 37795 transitions. Word has length 30 [2022-01-18 06:18:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:33,074 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 37795 transitions. [2022-01-18 06:18:33,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 37795 transitions. [2022-01-18 06:18:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:33,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:33,089 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] [2022-01-18 06:18:33,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:18:33,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:33,295 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash -35543505, now seen corresponding path program 27 times [2022-01-18 06:18:33,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726145218] [2022-01-18 06:18:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:33,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:33,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:33,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726145218] [2022-01-18 06:18:33,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726145218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:33,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559878202] [2022-01-18 06:18:33,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:18:33,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:33,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:33,498 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:33,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:18:33,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:18:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:18:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:33,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:18:33,959 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 38 treesize of output 30 [2022-01-18 06:18:33,961 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 28 treesize of output 20 [2022-01-18 06:18:33,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-01-18 06:18:34,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:34,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 06:18:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:34,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:34,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:34,819 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:18:34,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 133 [2022-01-18 06:18:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:34,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:34,841 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 96 treesize of output 109 [2022-01-18 06:18:34,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:34,847 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 81 treesize of output 77 [2022-01-18 06:18:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559878202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:35,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:35,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-18 06:18:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109294926] [2022-01-18 06:18:35,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:35,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:18:35,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:18:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:18:35,153 INFO L87 Difference]: Start difference. First operand 10505 states and 37795 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:37,933 INFO L93 Difference]: Finished difference Result 19262 states and 66696 transitions. [2022-01-18 06:18:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:18:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:37,979 INFO L225 Difference]: With dead ends: 19262 [2022-01-18 06:18:37,979 INFO L226 Difference]: Without dead ends: 19205 [2022-01-18 06:18:37,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=597, Invalid=5409, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:18:37,980 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 324 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 600 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1861 Invalid, 0 Unknown, 1241 Unchecked, 0.9s Time] [2022-01-18 06:18:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19205 states. [2022-01-18 06:18:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19205 to 10656. [2022-01-18 06:18:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.596433599249179) internal successors, (38320), 10655 states have internal predecessors, (38320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 38320 transitions. [2022-01-18 06:18:38,218 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 38320 transitions. Word has length 30 [2022-01-18 06:18:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:38,218 INFO L470 AbstractCegarLoop]: Abstraction has 10656 states and 38320 transitions. [2022-01-18 06:18:38,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 38320 transitions. [2022-01-18 06:18:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:38,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:38,236 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] [2022-01-18 06:18:38,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 06:18:38,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:38,436 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2114560187, now seen corresponding path program 28 times [2022-01-18 06:18:38,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:38,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869907991] [2022-01-18 06:18:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:38,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:38,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869907991] [2022-01-18 06:18:38,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869907991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85362764] [2022-01-18 06:18:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:18:38,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:38,677 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:38,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:18:38,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:18:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:38,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:18:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:38,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 06:18:39,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:39,073 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 54 treesize of output 46 [2022-01-18 06:18:39,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-01-18 06:18:39,127 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 26 treesize of output 18 [2022-01-18 06:18:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:39,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:39,360 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:18:39,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:18:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:39,381 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 49 treesize of output 76 [2022-01-18 06:18:39,397 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:39,397 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 214 treesize of output 198 [2022-01-18 06:18:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:39,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:18:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:39,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:18:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:39,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85362764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:39,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:18:39,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525557886] [2022-01-18 06:18:39,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:39,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:18:39,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:18:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:18:39,653 INFO L87 Difference]: Start difference. First operand 10656 states and 38320 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:41,348 INFO L93 Difference]: Finished difference Result 16958 states and 60208 transitions. [2022-01-18 06:18:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:18:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:41,391 INFO L225 Difference]: With dead ends: 16958 [2022-01-18 06:18:41,391 INFO L226 Difference]: Without dead ends: 16880 [2022-01-18 06:18:41,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=1571, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:18:41,392 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 322 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:41,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 189 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:18:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16880 states. [2022-01-18 06:18:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16880 to 10813. [2022-01-18 06:18:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 3.5926748057713653) internal successors, (38844), 10812 states have internal predecessors, (38844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 38844 transitions. [2022-01-18 06:18:41,623 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 38844 transitions. Word has length 30 [2022-01-18 06:18:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:41,623 INFO L470 AbstractCegarLoop]: Abstraction has 10813 states and 38844 transitions. [2022-01-18 06:18:41,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 38844 transitions. [2022-01-18 06:18:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:41,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:41,639 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] [2022-01-18 06:18:41,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 06:18:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 06:18:41,840 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 995764895, now seen corresponding path program 29 times [2022-01-18 06:18:41,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664253181] [2022-01-18 06:18:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:41,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:42,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664253181] [2022-01-18 06:18:42,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664253181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423558530] [2022-01-18 06:18:42,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:18:42,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:42,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:42,106 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:42,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:18:42,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:18:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:18:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:42,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:18:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:42,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 06:18:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:42,615 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 65 treesize of output 49 [2022-01-18 06:18:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:42,619 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 42 treesize of output 30 [2022-01-18 06:18:42,651 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 29 treesize of output 21 [2022-01-18 06:18:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:42,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:42,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,007 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:18:43,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:18:43,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:43,029 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 49 treesize of output 76 [2022-01-18 06:18:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:18:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:18:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423558530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:43,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:43,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 06:18:43,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373835423] [2022-01-18 06:18:43,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:43,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:18:43,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:18:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:18:43,261 INFO L87 Difference]: Start difference. First operand 10813 states and 38844 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:50,137 INFO L93 Difference]: Finished difference Result 20992 states and 73014 transitions. [2022-01-18 06:18:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 06:18:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:50,254 INFO L225 Difference]: With dead ends: 20992 [2022-01-18 06:18:50,254 INFO L226 Difference]: Without dead ends: 20938 [2022-01-18 06:18:50,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 06:18:50,256 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:50,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 424 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2596 Invalid, 0 Unknown, 330 Unchecked, 1.7s Time] [2022-01-18 06:18:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20938 states. [2022-01-18 06:18:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20938 to 11234. [2022-01-18 06:18:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11234 states, 11233 states have (on average 3.589958158995816) internal successors, (40326), 11233 states have internal predecessors, (40326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 40326 transitions. [2022-01-18 06:18:50,484 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 40326 transitions. Word has length 30 [2022-01-18 06:18:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:50,484 INFO L470 AbstractCegarLoop]: Abstraction has 11234 states and 40326 transitions. [2022-01-18 06:18:50,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 40326 transitions. [2022-01-18 06:18:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:50,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:50,501 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] [2022-01-18 06:18:50,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 06:18:50,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:18:50,702 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash -382774213, now seen corresponding path program 30 times [2022-01-18 06:18:50,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:50,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220383067] [2022-01-18 06:18:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:50,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:50,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220383067] [2022-01-18 06:18:50,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220383067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490965929] [2022-01-18 06:18:50,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:18:50,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:50,954 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:50,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:18:50,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:18:50,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:51,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:18:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:51,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-01-18 06:18:51,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:51,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:18:51,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 06:18:51,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 06:18:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:51,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:51,675 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:18:51,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:18:51,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:51,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-01-18 06:18:51,705 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:51,706 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 478 treesize of output 446 [2022-01-18 06:18:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:51,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:18:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:51,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:18:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:51,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:52,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490965929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:52,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:52,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:18:52,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703071730] [2022-01-18 06:18:52,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:52,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:18:52,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:18:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:18:52,018 INFO L87 Difference]: Start difference. First operand 11234 states and 40326 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:53,986 INFO L93 Difference]: Finished difference Result 18303 states and 64746 transitions. [2022-01-18 06:18:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:18:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:54,032 INFO L225 Difference]: With dead ends: 18303 [2022-01-18 06:18:54,033 INFO L226 Difference]: Without dead ends: 18282 [2022-01-18 06:18:54,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:18:54,033 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:54,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 256 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:18:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2022-01-18 06:18:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 11276. [2022-01-18 06:18:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 11275 states have (on average 3.5881152993348113) internal successors, (40456), 11275 states have internal predecessors, (40456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 40456 transitions. [2022-01-18 06:18:54,265 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 40456 transitions. Word has length 30 [2022-01-18 06:18:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 11276 states and 40456 transitions. [2022-01-18 06:18:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 40456 transitions. [2022-01-18 06:18:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:54,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:54,287 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] [2022-01-18 06:18:54,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:18:54,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 06:18:54,503 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225825, now seen corresponding path program 31 times [2022-01-18 06:18:54,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223876156] [2022-01-18 06:18:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:54,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:54,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223876156] [2022-01-18 06:18:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223876156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:54,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193008185] [2022-01-18 06:18:54,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:18:54,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:54,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:54,760 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:54,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:18:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:54,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:18:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-01-18 06:18:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,200 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 42 treesize of output 30 [2022-01-18 06:18:55,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 06:18:55,259 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 29 treesize of output 21 [2022-01-18 06:18:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:55,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:55,502 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:18:55,502 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 63 treesize of output 86 [2022-01-18 06:18:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:55,524 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 49 treesize of output 76 [2022-01-18 06:18:55,532 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:55,533 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 478 treesize of output 446 [2022-01-18 06:18:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:18:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:18:55,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:55,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193008185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:55,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:55,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:18:55,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297632888] [2022-01-18 06:18:55,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:55,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:18:55,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:18:55,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:18:55,851 INFO L87 Difference]: Start difference. First operand 11276 states and 40456 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:18:57,458 INFO L93 Difference]: Finished difference Result 17844 states and 63269 transitions. [2022-01-18 06:18:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:18:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:18:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:18:57,503 INFO L225 Difference]: With dead ends: 17844 [2022-01-18 06:18:57,503 INFO L226 Difference]: Without dead ends: 17793 [2022-01-18 06:18:57,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:18:57,503 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:18:57,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 221 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:18:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17793 states. [2022-01-18 06:18:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17793 to 11285. [2022-01-18 06:18:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11284 states have (on average 3.588709677419355) internal successors, (40495), 11284 states have internal predecessors, (40495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 40495 transitions. [2022-01-18 06:18:57,742 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 40495 transitions. Word has length 30 [2022-01-18 06:18:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:18:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 11285 states and 40495 transitions. [2022-01-18 06:18:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:18:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 40495 transitions. [2022-01-18 06:18:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:18:57,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:18:57,761 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] [2022-01-18 06:18:57,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 06:18:57,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:18:57,961 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:18:57,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:18:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1471923427, now seen corresponding path program 32 times [2022-01-18 06:18:57,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:18:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379606935] [2022-01-18 06:18:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:18:57,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:18:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:18:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:58,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:18:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379606935] [2022-01-18 06:18:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379606935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:18:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910016285] [2022-01-18 06:18:58,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:18:58,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:18:58,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:18:58,170 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:18:58,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:18:58,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:18:58,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:18:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:18:58,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:18:58,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:18:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:58,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-01-18 06:18:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:58,581 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 65 treesize of output 49 [2022-01-18 06:18:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:58,588 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 34 treesize of output 22 [2022-01-18 06:18:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:58,615 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 30 treesize of output 15 [2022-01-18 06:18:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:58,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:18:58,870 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:18:58,870 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 63 treesize of output 86 [2022-01-18 06:18:58,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:58,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:58,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:18:58,891 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 49 treesize of output 76 [2022-01-18 06:18:58,898 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:18:58,898 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 214 treesize of output 198 [2022-01-18 06:18:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:59,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-01-18 06:18:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:59,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-18 06:18:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:18:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:18:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:18:59,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910016285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:18:59,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:18:59,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-01-18 06:18:59,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505665849] [2022-01-18 06:18:59,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:18:59,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:18:59,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:18:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:18:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:18:59,152 INFO L87 Difference]: Start difference. First operand 11285 states and 40495 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:00,863 INFO L93 Difference]: Finished difference Result 18171 states and 64224 transitions. [2022-01-18 06:19:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:19:00,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:00,909 INFO L225 Difference]: With dead ends: 18171 [2022-01-18 06:19:00,909 INFO L226 Difference]: Without dead ends: 18150 [2022-01-18 06:19:00,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:19:00,910 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 295 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:00,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 247 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:19:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18150 states. [2022-01-18 06:19:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18150 to 11289. [2022-01-18 06:19:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 3.5893869596031185) internal successors, (40517), 11288 states have internal predecessors, (40517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 40517 transitions. [2022-01-18 06:19:01,143 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 40517 transitions. Word has length 30 [2022-01-18 06:19:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 40517 transitions. [2022-01-18 06:19:01,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 40517 transitions. [2022-01-18 06:19:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:01,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:01,162 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] [2022-01-18 06:19:01,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 06:19:01,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 06:19:01,362 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1713539717, now seen corresponding path program 33 times [2022-01-18 06:19:01,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213332179] [2022-01-18 06:19:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:01,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:01,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213332179] [2022-01-18 06:19:01,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213332179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124760733] [2022-01-18 06:19:01,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:19:01,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:01,553 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:01,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:19:01,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:19:01,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:01,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:01,925 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 43 treesize of output 31 [2022-01-18 06:19:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:01,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-01-18 06:19:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:01,931 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 39 treesize of output 27 [2022-01-18 06:19:01,985 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 22 treesize of output 14 [2022-01-18 06:19:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:02,206 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:02,206 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 63 treesize of output 86 [2022-01-18 06:19:02,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:02,227 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 49 treesize of output 76 [2022-01-18 06:19:02,235 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:02,235 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 478 treesize of output 446 [2022-01-18 06:19:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:02,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:19:02,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:02,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:19:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:02,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124760733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:02,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:02,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:19:02,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777665877] [2022-01-18 06:19:02,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:02,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:19:02,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:19:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:19:02,531 INFO L87 Difference]: Start difference. First operand 11289 states and 40517 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:04,322 INFO L93 Difference]: Finished difference Result 15127 states and 51549 transitions. [2022-01-18 06:19:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 06:19:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:04,359 INFO L225 Difference]: With dead ends: 15127 [2022-01-18 06:19:04,359 INFO L226 Difference]: Without dead ends: 15091 [2022-01-18 06:19:04,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:19:04,360 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 395 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:04,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 264 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:19:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2022-01-18 06:19:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 11206. [2022-01-18 06:19:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11206 states, 11205 states have (on average 3.5927710843373495) internal successors, (40257), 11205 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 40257 transitions. [2022-01-18 06:19:04,602 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 40257 transitions. Word has length 30 [2022-01-18 06:19:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 11206 states and 40257 transitions. [2022-01-18 06:19:04,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 40257 transitions. [2022-01-18 06:19:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:04,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:04,620 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] [2022-01-18 06:19:04,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:19:04,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:04,821 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1448303207, now seen corresponding path program 34 times [2022-01-18 06:19:04,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:04,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53827258] [2022-01-18 06:19:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:04,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:05,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53827258] [2022-01-18 06:19:05,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53827258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772936650] [2022-01-18 06:19:05,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:19:05,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:05,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:05,062 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:05,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:19:05,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:19:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:05,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:05,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 06:19:05,447 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 28 treesize of output 20 [2022-01-18 06:19:05,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-01-18 06:19:05,495 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 22 treesize of output 14 [2022-01-18 06:19:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:05,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:05,718 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:05,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:19:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:05,738 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 49 treesize of output 76 [2022-01-18 06:19:05,745 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:05,746 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 478 treesize of output 446 [2022-01-18 06:19:05,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:05,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:19:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:05,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:19:05,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:05,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:06,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772936650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:06,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:06,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:19:06,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725180669] [2022-01-18 06:19:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:06,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:19:06,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:19:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:19:06,041 INFO L87 Difference]: Start difference. First operand 11206 states and 40257 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:08,189 INFO L93 Difference]: Finished difference Result 15682 states and 53273 transitions. [2022-01-18 06:19:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:19:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:08,227 INFO L225 Difference]: With dead ends: 15682 [2022-01-18 06:19:08,227 INFO L226 Difference]: Without dead ends: 15646 [2022-01-18 06:19:08,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:19:08,228 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 418 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:08,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 289 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:19:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2022-01-18 06:19:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 11312. [2022-01-18 06:19:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 11311 states have (on average 3.5949076120590577) internal successors, (40662), 11311 states have internal predecessors, (40662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 40662 transitions. [2022-01-18 06:19:08,513 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 40662 transitions. Word has length 30 [2022-01-18 06:19:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:08,513 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 40662 transitions. [2022-01-18 06:19:08,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 40662 transitions. [2022-01-18 06:19:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:08,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:08,530 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] [2022-01-18 06:19:08,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:19:08,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:08,730 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash 701800485, now seen corresponding path program 35 times [2022-01-18 06:19:08,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352200614] [2022-01-18 06:19:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:08,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:09,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:09,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352200614] [2022-01-18 06:19:09,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352200614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:09,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423515450] [2022-01-18 06:19:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:19:09,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:09,026 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:09,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:19:09,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:19:09,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:19:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:09,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:19:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:09,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 06:19:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:09,525 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 52 treesize of output 42 [2022-01-18 06:19:09,600 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 33 treesize of output 25 [2022-01-18 06:19:09,602 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 27 treesize of output 19 [2022-01-18 06:19:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:09,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:09,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:09,919 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:19:09,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:19:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:09,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:09,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-01-18 06:19:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:10,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:10,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:10,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:19:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:10,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:10,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:19:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:10,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:10,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423515450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:10,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:10,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 06:19:10,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278354816] [2022-01-18 06:19:10,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:10,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:19:10,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:19:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:19:10,190 INFO L87 Difference]: Start difference. First operand 11312 states and 40662 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:16,339 INFO L93 Difference]: Finished difference Result 21377 states and 74506 transitions. [2022-01-18 06:19:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 06:19:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:16,389 INFO L225 Difference]: With dead ends: 21377 [2022-01-18 06:19:16,389 INFO L226 Difference]: Without dead ends: 21326 [2022-01-18 06:19:16,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1660, Invalid=8642, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:19:16,390 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 534 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:16,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 460 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 06:19:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21326 states. [2022-01-18 06:19:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21326 to 11846. [2022-01-18 06:19:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11846 states, 11845 states have (on average 3.599409033347404) internal successors, (42635), 11845 states have internal predecessors, (42635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11846 states to 11846 states and 42635 transitions. [2022-01-18 06:19:16,643 INFO L78 Accepts]: Start accepts. Automaton has 11846 states and 42635 transitions. Word has length 30 [2022-01-18 06:19:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:16,644 INFO L470 AbstractCegarLoop]: Abstraction has 11846 states and 42635 transitions. [2022-01-18 06:19:16,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 11846 states and 42635 transitions. [2022-01-18 06:19:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:16,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:16,662 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] [2022-01-18 06:19:16,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 06:19:16,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:16,863 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash -416994807, now seen corresponding path program 36 times [2022-01-18 06:19:16,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:16,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935965565] [2022-01-18 06:19:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:16,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:17,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935965565] [2022-01-18 06:19:17,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935965565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413819204] [2022-01-18 06:19:17,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:19:17,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:17,093 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:17,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:19:17,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:19:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:17,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:17,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-01-18 06:19:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:17,497 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 107 treesize of output 65 [2022-01-18 06:19:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:17,501 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 94 treesize of output 52 [2022-01-18 06:19:17,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 06:19:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:17,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:17,767 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:17,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 86 [2022-01-18 06:19:17,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:17,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:17,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:17,788 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 49 treesize of output 76 [2022-01-18 06:19:17,797 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:17,797 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 214 treesize of output 198 [2022-01-18 06:19:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:18,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-01-18 06:19:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:18,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-18 06:19:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:18,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413819204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:18,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:18,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-01-18 06:19:18,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605718253] [2022-01-18 06:19:18,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:18,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:19:18,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:19:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:19:18,140 INFO L87 Difference]: Start difference. First operand 11846 states and 42635 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:20,095 INFO L93 Difference]: Finished difference Result 18406 states and 65255 transitions. [2022-01-18 06:19:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:19:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:20,137 INFO L225 Difference]: With dead ends: 18406 [2022-01-18 06:19:20,138 INFO L226 Difference]: Without dead ends: 18352 [2022-01-18 06:19:20,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:19:20,138 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:20,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 208 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:19:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18352 states. [2022-01-18 06:19:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18352 to 11938. [2022-01-18 06:19:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11938 states, 11937 states have (on average 3.600150791656195) internal successors, (42975), 11937 states have internal predecessors, (42975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 42975 transitions. [2022-01-18 06:19:20,362 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 42975 transitions. Word has length 30 [2022-01-18 06:19:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:20,362 INFO L470 AbstractCegarLoop]: Abstraction has 11938 states and 42975 transitions. [2022-01-18 06:19:20,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 42975 transitions. [2022-01-18 06:19:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:20,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:20,380 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] [2022-01-18 06:19:20,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 06:19:20,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 06:19:20,581 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -22684839, now seen corresponding path program 37 times [2022-01-18 06:19:20,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:20,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082998956] [2022-01-18 06:19:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:20,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:20,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082998956] [2022-01-18 06:19:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082998956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14133136] [2022-01-18 06:19:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:19:20,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:20,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:20,799 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:19:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:20,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:21,181 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 38 treesize of output 30 [2022-01-18 06:19:21,188 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 30 treesize of output 22 [2022-01-18 06:19:21,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-01-18 06:19:21,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 06:19:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:21,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:21,462 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:21,462 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 63 treesize of output 86 [2022-01-18 06:19:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:21,486 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 49 treesize of output 76 [2022-01-18 06:19:21,494 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:21,494 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 478 treesize of output 446 [2022-01-18 06:19:21,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:21,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:19:21,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:21,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:19:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:21,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:21,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14133136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:21,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:21,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:19:21,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750578728] [2022-01-18 06:19:21,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:21,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:19:21,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:19:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:19:21,792 INFO L87 Difference]: Start difference. First operand 11938 states and 42975 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:25,368 INFO L93 Difference]: Finished difference Result 22417 states and 74446 transitions. [2022-01-18 06:19:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:19:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:25,414 INFO L225 Difference]: With dead ends: 22417 [2022-01-18 06:19:25,414 INFO L226 Difference]: Without dead ends: 22288 [2022-01-18 06:19:25,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:19:25,415 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 515 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:25,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 682 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 06:19:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22288 states. [2022-01-18 06:19:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22288 to 12527. [2022-01-18 06:19:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12527 states, 12526 states have (on average 3.6147213795305766) internal successors, (45278), 12526 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12527 states to 12527 states and 45278 transitions. [2022-01-18 06:19:25,730 INFO L78 Accepts]: Start accepts. Automaton has 12527 states and 45278 transitions. Word has length 30 [2022-01-18 06:19:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:25,730 INFO L470 AbstractCegarLoop]: Abstraction has 12527 states and 45278 transitions. [2022-01-18 06:19:25,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 12527 states and 45278 transitions. [2022-01-18 06:19:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:25,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:25,750 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] [2022-01-18 06:19:25,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 06:19:25,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 06:19:25,950 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1697328153, now seen corresponding path program 38 times [2022-01-18 06:19:25,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:25,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415951589] [2022-01-18 06:19:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:25,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:26,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:26,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415951589] [2022-01-18 06:19:26,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415951589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030419509] [2022-01-18 06:19:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:19:26,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:26,193 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:26,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:19:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:19:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 06:19:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:26,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:19:26,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:26,569 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 42 treesize of output 30 [2022-01-18 06:19:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:26,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2022-01-18 06:19:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:26,574 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 37 treesize of output 25 [2022-01-18 06:19:26,668 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 22 treesize of output 14 [2022-01-18 06:19:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:26,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:27,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,044 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:19:27,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-01-18 06:19:27,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:27,065 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 61 treesize of output 84 [2022-01-18 06:19:27,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,072 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 1014 treesize of output 966 [2022-01-18 06:19:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:27,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:19:27,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:27,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:19:27,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030419509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:27,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:27,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-18 06:19:27,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101745123] [2022-01-18 06:19:27,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:19:27,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:19:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:19:27,430 INFO L87 Difference]: Start difference. First operand 12527 states and 45278 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:35,936 INFO L93 Difference]: Finished difference Result 23372 states and 81645 transitions. [2022-01-18 06:19:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 06:19:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:36,006 INFO L225 Difference]: With dead ends: 23372 [2022-01-18 06:19:36,006 INFO L226 Difference]: Without dead ends: 23302 [2022-01-18 06:19:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1788, Invalid=8718, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 06:19:36,007 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 670 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:36,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 468 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 06:19:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23302 states. [2022-01-18 06:19:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23302 to 13527. [2022-01-18 06:19:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13527 states, 13526 states have (on average 3.618142836019518) internal successors, (48939), 13526 states have internal predecessors, (48939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13527 states to 13527 states and 48939 transitions. [2022-01-18 06:19:36,322 INFO L78 Accepts]: Start accepts. Automaton has 13527 states and 48939 transitions. Word has length 30 [2022-01-18 06:19:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:36,322 INFO L470 AbstractCegarLoop]: Abstraction has 13527 states and 48939 transitions. [2022-01-18 06:19:36,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13527 states and 48939 transitions. [2022-01-18 06:19:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:36,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:36,346 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] [2022-01-18 06:19:36,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 06:19:36,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 06:19:36,547 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608453, now seen corresponding path program 39 times [2022-01-18 06:19:36,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:36,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059384980] [2022-01-18 06:19:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:36,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:36,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:36,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059384980] [2022-01-18 06:19:36,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059384980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:36,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885694905] [2022-01-18 06:19:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:19:36,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:36,747 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:36,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:19:36,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:19:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:19:36,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:36,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:19:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:37,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:37,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:19:37,310 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 30 treesize of output 22 [2022-01-18 06:19:37,313 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 24 treesize of output 16 [2022-01-18 06:19:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:37,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:37,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,756 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:19:37,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-01-18 06:19:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:37,780 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 117 treesize of output 122 [2022-01-18 06:19:37,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:37,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 413 treesize of output 389 [2022-01-18 06:19:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885694905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:38,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:38,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 06:19:38,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990140511] [2022-01-18 06:19:38,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:38,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:19:38,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:19:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:19:38,211 INFO L87 Difference]: Start difference. First operand 13527 states and 48939 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:39,006 INFO L93 Difference]: Finished difference Result 15110 states and 53669 transitions. [2022-01-18 06:19:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:19:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:39,069 INFO L225 Difference]: With dead ends: 15110 [2022-01-18 06:19:39,069 INFO L226 Difference]: Without dead ends: 15052 [2022-01-18 06:19:39,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:19:39,069 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:39,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 283 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1027 Invalid, 0 Unknown, 503 Unchecked, 0.5s Time] [2022-01-18 06:19:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2022-01-18 06:19:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 13566. [2022-01-18 06:19:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 3.6155547364541096) internal successors, (49045), 13565 states have internal predecessors, (49045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 49045 transitions. [2022-01-18 06:19:39,425 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 49045 transitions. Word has length 30 [2022-01-18 06:19:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:39,425 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 49045 transitions. [2022-01-18 06:19:39,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 49045 transitions. [2022-01-18 06:19:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:39,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:39,448 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] [2022-01-18 06:19:39,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 06:19:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:19:39,649 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2146403745, now seen corresponding path program 40 times [2022-01-18 06:19:39,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:39,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323746678] [2022-01-18 06:19:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:39,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:39,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:39,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323746678] [2022-01-18 06:19:39,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323746678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:39,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474374720] [2022-01-18 06:19:39,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:19:39,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:39,866 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:19:39,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:19:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:40,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:40,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:40,359 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 45 treesize of output 33 [2022-01-18 06:19:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:40,361 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 44 treesize of output 32 [2022-01-18 06:19:40,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 06:19:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:40,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:40,611 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:40,611 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 78 treesize of output 97 [2022-01-18 06:19:40,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:40,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:40,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:40,632 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 60 treesize of output 83 [2022-01-18 06:19:40,640 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:40,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1962 treesize of output 1866 [2022-01-18 06:19:41,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:41,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:19:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:41,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:41,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:19:41,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:41,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474374720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:41,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:41,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:19:41,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840742379] [2022-01-18 06:19:41,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:41,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:19:41,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:19:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:19:41,367 INFO L87 Difference]: Start difference. First operand 13566 states and 49045 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:41,983 INFO L93 Difference]: Finished difference Result 14686 states and 52491 transitions. [2022-01-18 06:19:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:19:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:42,029 INFO L225 Difference]: With dead ends: 14686 [2022-01-18 06:19:42,029 INFO L226 Difference]: Without dead ends: 14661 [2022-01-18 06:19:42,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:19:42,031 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:42,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 192 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:19:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2022-01-18 06:19:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 13684. [2022-01-18 06:19:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13684 states, 13683 states have (on average 3.6158737119052837) internal successors, (49476), 13683 states have internal predecessors, (49476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13684 states to 13684 states and 49476 transitions. [2022-01-18 06:19:42,335 INFO L78 Accepts]: Start accepts. Automaton has 13684 states and 49476 transitions. Word has length 30 [2022-01-18 06:19:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 13684 states and 49476 transitions. [2022-01-18 06:19:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13684 states and 49476 transitions. [2022-01-18 06:19:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:42,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:42,360 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] [2022-01-18 06:19:42,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 06:19:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:42,561 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 198851673, now seen corresponding path program 41 times [2022-01-18 06:19:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:42,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609260464] [2022-01-18 06:19:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:42,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:42,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609260464] [2022-01-18 06:19:42,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609260464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946770532] [2022-01-18 06:19:42,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:19:42,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:42,775 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:42,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:19:42,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:19:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:19:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:42,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:19:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-01-18 06:19:43,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,294 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 40 treesize of output 28 [2022-01-18 06:19:43,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 06:19:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:43,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,774 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:19:43,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 98 [2022-01-18 06:19:43,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:43,795 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 61 treesize of output 84 [2022-01-18 06:19:43,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:19:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:19:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946770532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:44,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:44,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-01-18 06:19:44,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166038592] [2022-01-18 06:19:44,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:44,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:19:44,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:19:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:19:44,043 INFO L87 Difference]: Start difference. First operand 13684 states and 49476 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:48,972 INFO L93 Difference]: Finished difference Result 24766 states and 86992 transitions. [2022-01-18 06:19:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 06:19:48,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:49,033 INFO L225 Difference]: With dead ends: 24766 [2022-01-18 06:19:49,033 INFO L226 Difference]: Without dead ends: 24705 [2022-01-18 06:19:49,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1200, Invalid=8306, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 06:19:49,034 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 474 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:49,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 411 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2899 Invalid, 0 Unknown, 377 Unchecked, 1.8s Time] [2022-01-18 06:19:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24705 states. [2022-01-18 06:19:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24705 to 13889. [2022-01-18 06:19:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13889 states, 13888 states have (on average 3.6162154377880182) internal successors, (50222), 13888 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 50222 transitions. [2022-01-18 06:19:49,331 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 50222 transitions. Word has length 30 [2022-01-18 06:19:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:49,331 INFO L470 AbstractCegarLoop]: Abstraction has 13889 states and 50222 transitions. [2022-01-18 06:19:49,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 50222 transitions. [2022-01-18 06:19:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:49,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:49,354 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] [2022-01-18 06:19:49,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 06:19:49,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 06:19:49,555 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2114563583, now seen corresponding path program 42 times [2022-01-18 06:19:49,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213526278] [2022-01-18 06:19:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:49,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:49,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213526278] [2022-01-18 06:19:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213526278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283524662] [2022-01-18 06:19:49,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:19:49,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:49,800 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:49,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:19:49,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:19:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:49,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-18 06:19:50,253 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 32 treesize of output 24 [2022-01-18 06:19:50,277 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 30 treesize of output 22 [2022-01-18 06:19:50,279 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 24 treesize of output 16 [2022-01-18 06:19:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:50,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:50,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:50,498 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 63 treesize of output 86 [2022-01-18 06:19:50,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:50,534 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 49 treesize of output 76 [2022-01-18 06:19:50,542 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:50,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 218 [2022-01-18 06:19:50,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:50,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 06:19:50,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:50,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-01-18 06:19:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:50,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:50,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283524662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:50,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:50,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-18 06:19:50,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362797832] [2022-01-18 06:19:50,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:50,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:19:50,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:19:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:19:50,837 INFO L87 Difference]: Start difference. First operand 13889 states and 50222 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:51,408 INFO L93 Difference]: Finished difference Result 15095 states and 53867 transitions. [2022-01-18 06:19:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:19:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:51,448 INFO L225 Difference]: With dead ends: 15095 [2022-01-18 06:19:51,448 INFO L226 Difference]: Without dead ends: 15056 [2022-01-18 06:19:51,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:19:51,449 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:51,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 186 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:19:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2022-01-18 06:19:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 13856. [2022-01-18 06:19:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13856 states, 13855 states have (on average 3.6176109707686757) internal successors, (50122), 13855 states have internal predecessors, (50122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13856 states to 13856 states and 50122 transitions. [2022-01-18 06:19:51,705 INFO L78 Accepts]: Start accepts. Automaton has 13856 states and 50122 transitions. Word has length 30 [2022-01-18 06:19:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:51,705 INFO L470 AbstractCegarLoop]: Abstraction has 13856 states and 50122 transitions. [2022-01-18 06:19:51,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 13856 states and 50122 transitions. [2022-01-18 06:19:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:51,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:51,728 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] [2022-01-18 06:19:51,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 06:19:51,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:19:51,929 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1529864005, now seen corresponding path program 43 times [2022-01-18 06:19:51,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584927799] [2022-01-18 06:19:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:51,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:52,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:52,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584927799] [2022-01-18 06:19:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584927799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:52,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641398139] [2022-01-18 06:19:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:19:52,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:52,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:52,152 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:52,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:19:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:52,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:52,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:52,649 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 44 treesize of output 32 [2022-01-18 06:19:52,731 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 30 treesize of output 22 [2022-01-18 06:19:52,733 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 27 treesize of output 19 [2022-01-18 06:19:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:52,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:52,964 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:52,965 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 78 treesize of output 97 [2022-01-18 06:19:52,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:52,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:52,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:52,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-01-18 06:19:52,997 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:52,997 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 982 treesize of output 934 [2022-01-18 06:19:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:53,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:53,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:19:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:53,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:19:53,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641398139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:53,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:53,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-18 06:19:53,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112585959] [2022-01-18 06:19:53,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:53,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:19:53,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:53,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:19:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:19:53,413 INFO L87 Difference]: Start difference. First operand 13856 states and 50122 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:53,878 INFO L93 Difference]: Finished difference Result 15000 states and 53772 transitions. [2022-01-18 06:19:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:19:53,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:53,914 INFO L225 Difference]: With dead ends: 15000 [2022-01-18 06:19:53,914 INFO L226 Difference]: Without dead ends: 14967 [2022-01-18 06:19:53,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:19:53,914 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:53,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 302 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:19:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2022-01-18 06:19:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 13886. [2022-01-18 06:19:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13886 states, 13885 states have (on average 3.616996759092546) internal successors, (50222), 13885 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13886 states to 13886 states and 50222 transitions. [2022-01-18 06:19:54,163 INFO L78 Accepts]: Start accepts. Automaton has 13886 states and 50222 transitions. Word has length 30 [2022-01-18 06:19:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:54,164 INFO L470 AbstractCegarLoop]: Abstraction has 13886 states and 50222 transitions. [2022-01-18 06:19:54,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13886 states and 50222 transitions. [2022-01-18 06:19:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:54,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:54,185 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] [2022-01-18 06:19:54,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 06:19:54,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-01-18 06:19:54,386 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1344651679, now seen corresponding path program 44 times [2022-01-18 06:19:54,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596515382] [2022-01-18 06:19:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:54,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:54,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596515382] [2022-01-18 06:19:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596515382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794138389] [2022-01-18 06:19:54,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:19:54,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:54,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:54,612 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:54,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:19:54,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:19:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:19:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:54,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:19:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:54,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:55,140 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 34 treesize of output 26 [2022-01-18 06:19:55,195 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 32 treesize of output 24 [2022-01-18 06:19:55,197 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 26 treesize of output 18 [2022-01-18 06:19:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:55,445 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:19:55,445 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 78 treesize of output 97 [2022-01-18 06:19:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:55,471 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 60 treesize of output 83 [2022-01-18 06:19:55,480 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:19:55,480 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 452 treesize of output 428 [2022-01-18 06:19:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:55,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:19:55,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:55,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:19:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:55,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794138389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:55,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:55,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:19:55,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121934722] [2022-01-18 06:19:55,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:55,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:19:55,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:19:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:19:55,850 INFO L87 Difference]: Start difference. First operand 13886 states and 50222 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:56,283 INFO L93 Difference]: Finished difference Result 14845 states and 53246 transitions. [2022-01-18 06:19:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:19:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:56,319 INFO L225 Difference]: With dead ends: 14845 [2022-01-18 06:19:56,319 INFO L226 Difference]: Without dead ends: 14782 [2022-01-18 06:19:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:19:56,319 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:56,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:19:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2022-01-18 06:19:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 13895. [2022-01-18 06:19:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 3.617244853893767) internal successors, (50258), 13894 states have internal predecessors, (50258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 50258 transitions. [2022-01-18 06:19:56,621 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 50258 transitions. Word has length 30 [2022-01-18 06:19:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:19:56,621 INFO L470 AbstractCegarLoop]: Abstraction has 13895 states and 50258 transitions. [2022-01-18 06:19:56,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 50258 transitions. [2022-01-18 06:19:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:19:56,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:19:56,644 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] [2022-01-18 06:19:56,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:19:56,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:56,845 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:19:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:19:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 324833635, now seen corresponding path program 45 times [2022-01-18 06:19:56,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:19:56,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29540936] [2022-01-18 06:19:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:19:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:19:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:19:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:57,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:19:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29540936] [2022-01-18 06:19:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29540936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:19:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601517162] [2022-01-18 06:19:57,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:19:57,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:19:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:19:57,019 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:19:57,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:19:57,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:19:57,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:19:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:19:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:19:57,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:19:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:57,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:19:57,480 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 32 treesize of output 24 [2022-01-18 06:19:57,482 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 31 treesize of output 23 [2022-01-18 06:19:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:19:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-18 06:19:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:57,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:19:57,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,885 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:19:57,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 154 [2022-01-18 06:19:57,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:19:57,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 122 [2022-01-18 06:19:57,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:19:57,917 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 805 treesize of output 757 [2022-01-18 06:19:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:19:58,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601517162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:19:58,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:19:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 06:19:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195357776] [2022-01-18 06:19:58,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:19:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:19:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:19:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:19:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:19:58,802 INFO L87 Difference]: Start difference. First operand 13895 states and 50258 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:19:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:19:59,699 INFO L93 Difference]: Finished difference Result 16534 states and 58806 transitions. [2022-01-18 06:19:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:19:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:19:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:19:59,740 INFO L225 Difference]: With dead ends: 16534 [2022-01-18 06:19:59,740 INFO L226 Difference]: Without dead ends: 16501 [2022-01-18 06:19:59,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:19:59,741 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:19:59,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 327 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 874 Invalid, 0 Unknown, 264 Unchecked, 0.5s Time] [2022-01-18 06:19:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2022-01-18 06:19:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 14057. [2022-01-18 06:19:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 3.6129055207740466) internal successors, (50783), 14056 states have internal predecessors, (50783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 50783 transitions. [2022-01-18 06:20:00,000 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 50783 transitions. Word has length 30 [2022-01-18 06:20:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:00,000 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 50783 transitions. [2022-01-18 06:20:00,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 50783 transitions. [2022-01-18 06:20:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:00,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:00,025 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] [2022-01-18 06:20:00,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 06:20:00,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:00,233 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1748496823, now seen corresponding path program 46 times [2022-01-18 06:20:00,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:00,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090509248] [2022-01-18 06:20:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:00,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:00,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090509248] [2022-01-18 06:20:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090509248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432220735] [2022-01-18 06:20:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:20:00,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:00,448 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:20:00,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:20:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:20:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:00,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:00,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:00,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:01,036 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 32 treesize of output 24 [2022-01-18 06:20:01,038 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 27 treesize of output 19 [2022-01-18 06:20:01,081 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 22 treesize of output 14 [2022-01-18 06:20:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:01,293 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:20:01,293 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 78 treesize of output 97 [2022-01-18 06:20:01,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:01,315 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 60 treesize of output 83 [2022-01-18 06:20:01,323 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:20:01,323 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 978 treesize of output 930 [2022-01-18 06:20:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:01,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:20:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:01,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:20:01,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:01,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432220735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:01,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:20:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562134703] [2022-01-18 06:20:01,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:01,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:20:01,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:20:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:20:01,693 INFO L87 Difference]: Start difference. First operand 14057 states and 50783 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:02,250 INFO L93 Difference]: Finished difference Result 14932 states and 53497 transitions. [2022-01-18 06:20:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:20:02,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:02,286 INFO L225 Difference]: With dead ends: 14932 [2022-01-18 06:20:02,287 INFO L226 Difference]: Without dead ends: 14907 [2022-01-18 06:20:02,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:20:02,287 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:02,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 284 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:20:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2022-01-18 06:20:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 13958. [2022-01-18 06:20:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13958 states, 13957 states have (on average 3.6155334240882713) internal successors, (50462), 13957 states have internal predecessors, (50462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13958 states to 13958 states and 50462 transitions. [2022-01-18 06:20:02,533 INFO L78 Accepts]: Start accepts. Automaton has 13958 states and 50462 transitions. Word has length 30 [2022-01-18 06:20:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:02,533 INFO L470 AbstractCegarLoop]: Abstraction has 13958 states and 50462 transitions. [2022-01-18 06:20:02,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 13958 states and 50462 transitions. [2022-01-18 06:20:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:02,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:02,557 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] [2022-01-18 06:20:02,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 06:20:02,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:02,757 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash 277277977, now seen corresponding path program 47 times [2022-01-18 06:20:02,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:02,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982966290] [2022-01-18 06:20:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:02,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:02,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:02,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982966290] [2022-01-18 06:20:02,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982966290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:02,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936574917] [2022-01-18 06:20:02,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:20:02,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:02,969 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:02,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:20:03,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:20:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:20:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:03,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:03,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:03,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:03,764 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 43 treesize of output 69 [2022-01-18 06:20:04,184 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 06:20:04,184 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 203 [2022-01-18 06:20:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:04,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-01-18 06:20:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:04,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:04,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:04,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 148 [2022-01-18 06:20:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:04,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 112 [2022-01-18 06:20:04,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:04,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:05,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936574917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:05,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:05,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-01-18 06:20:05,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117518421] [2022-01-18 06:20:05,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:20:05,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:20:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:20:05,178 INFO L87 Difference]: Start difference. First operand 13958 states and 50462 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:12,608 INFO L93 Difference]: Finished difference Result 17619 states and 62768 transitions. [2022-01-18 06:20:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:20:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:12,654 INFO L225 Difference]: With dead ends: 17619 [2022-01-18 06:20:12,654 INFO L226 Difference]: Without dead ends: 17590 [2022-01-18 06:20:12,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1079, Invalid=5396, Unknown=5, NotChecked=0, Total=6480 [2022-01-18 06:20:12,656 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 259 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:12,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 469 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 1051 Unchecked, 0.3s Time] [2022-01-18 06:20:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17590 states. [2022-01-18 06:20:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17590 to 14619. [2022-01-18 06:20:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 3.619715419346012) internal successors, (52913), 14618 states have internal predecessors, (52913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 52913 transitions. [2022-01-18 06:20:12,956 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 52913 transitions. Word has length 30 [2022-01-18 06:20:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:12,956 INFO L470 AbstractCegarLoop]: Abstraction has 14619 states and 52913 transitions. [2022-01-18 06:20:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 52913 transitions. [2022-01-18 06:20:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:12,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:12,982 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] [2022-01-18 06:20:12,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:20:13,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 06:20:13,183 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash -742540067, now seen corresponding path program 48 times [2022-01-18 06:20:13,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:13,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070507166] [2022-01-18 06:20:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:13,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:13,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070507166] [2022-01-18 06:20:13,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070507166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415807385] [2022-01-18 06:20:13,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:20:13,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:13,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:13,357 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:13,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:20:13,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:20:13,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:13,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:20:13,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:13,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:13,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:13,759 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 32 treesize of output 24 [2022-01-18 06:20:13,761 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 29 treesize of output 21 [2022-01-18 06:20:13,785 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 26 treesize of output 18 [2022-01-18 06:20:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:14,009 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:20:14,009 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 78 treesize of output 97 [2022-01-18 06:20:14,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:14,031 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 60 treesize of output 83 [2022-01-18 06:20:14,039 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:20:14,040 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 978 treesize of output 930 [2022-01-18 06:20:14,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:14,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:20:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:14,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:20:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:14,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415807385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:14,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:14,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:20:14,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103673491] [2022-01-18 06:20:14,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:14,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:20:14,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:20:14,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:20:14,410 INFO L87 Difference]: Start difference. First operand 14619 states and 52913 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:14,775 INFO L93 Difference]: Finished difference Result 15793 states and 56665 transitions. [2022-01-18 06:20:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:20:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:14,813 INFO L225 Difference]: With dead ends: 15793 [2022-01-18 06:20:14,813 INFO L226 Difference]: Without dead ends: 15760 [2022-01-18 06:20:14,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:20:14,813 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:14,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 189 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-01-18 06:20:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2022-01-18 06:20:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 14779. [2022-01-18 06:20:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.6170659087833266) internal successors, (53453), 14778 states have internal predecessors, (53453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 53453 transitions. [2022-01-18 06:20:15,155 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 53453 transitions. Word has length 30 [2022-01-18 06:20:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:15,155 INFO L470 AbstractCegarLoop]: Abstraction has 14779 states and 53453 transitions. [2022-01-18 06:20:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 53453 transitions. [2022-01-18 06:20:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:15,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:15,182 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] [2022-01-18 06:20:15,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 06:20:15,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 06:20:15,382 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1479096771, now seen corresponding path program 49 times [2022-01-18 06:20:15,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:15,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504509386] [2022-01-18 06:20:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:15,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:15,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504509386] [2022-01-18 06:20:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504509386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739291070] [2022-01-18 06:20:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:20:15,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:15,574 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:15,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:20:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:20:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:15,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:15,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:15,983 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 108 treesize of output 66 [2022-01-18 06:20:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:15,986 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 94 treesize of output 52 [2022-01-18 06:20:16,050 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 06:20:16,050 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 67 [2022-01-18 06:20:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:16,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:16,257 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:20:16,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 97 [2022-01-18 06:20:16,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:16,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:16,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:16,286 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 60 treesize of output 83 [2022-01-18 06:20:16,297 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:20:16,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1766 treesize of output 1670 [2022-01-18 06:20:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:17,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:20:17,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:17,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:20:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:17,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739291070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:17,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:20:17,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000629155] [2022-01-18 06:20:17,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:17,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:20:17,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:20:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:20:17,417 INFO L87 Difference]: Start difference. First operand 14779 states and 53453 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:17,891 INFO L93 Difference]: Finished difference Result 15575 states and 55865 transitions. [2022-01-18 06:20:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:20:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:17,928 INFO L225 Difference]: With dead ends: 15575 [2022-01-18 06:20:17,928 INFO L226 Difference]: Without dead ends: 15542 [2022-01-18 06:20:17,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:20:17,929 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:17,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 195 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:20:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15542 states. [2022-01-18 06:20:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15542 to 14580. [2022-01-18 06:20:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 3.619795596405789) internal successors, (52773), 14579 states have internal predecessors, (52773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 52773 transitions. [2022-01-18 06:20:18,175 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 52773 transitions. Word has length 30 [2022-01-18 06:20:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:18,175 INFO L470 AbstractCegarLoop]: Abstraction has 14580 states and 52773 transitions. [2022-01-18 06:20:18,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 52773 transitions. [2022-01-18 06:20:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:18,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:18,199 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] [2022-01-18 06:20:18,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 06:20:18,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 06:20:18,400 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1602758267, now seen corresponding path program 50 times [2022-01-18 06:20:18,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:18,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860628843] [2022-01-18 06:20:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:18,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:18,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860628843] [2022-01-18 06:20:18,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860628843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995482092] [2022-01-18 06:20:18,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:20:18,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:18,596 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:18,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 06:20:18,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:20:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:20:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:18,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:18,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:19,069 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 37 treesize of output 29 [2022-01-18 06:20:19,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-18 06:20:19,115 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 31 treesize of output 23 [2022-01-18 06:20:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:19,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:19,342 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:20:19,342 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 78 treesize of output 97 [2022-01-18 06:20:19,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:19,370 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 60 treesize of output 83 [2022-01-18 06:20:19,384 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:20:19,384 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 488 treesize of output 464 [2022-01-18 06:20:19,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:19,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:20:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:19,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:20:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:19,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995482092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:19,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:19,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 06:20:19,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078620493] [2022-01-18 06:20:19,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:19,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:20:19,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:20:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:20:19,723 INFO L87 Difference]: Start difference. First operand 14580 states and 52773 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:20,237 INFO L93 Difference]: Finished difference Result 15487 states and 55627 transitions. [2022-01-18 06:20:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:20:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:20,273 INFO L225 Difference]: With dead ends: 15487 [2022-01-18 06:20:20,274 INFO L226 Difference]: Without dead ends: 15454 [2022-01-18 06:20:20,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:20:20,274 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:20,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 274 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:20:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2022-01-18 06:20:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14400. [2022-01-18 06:20:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 3.621154246822696) internal successors, (52141), 14399 states have internal predecessors, (52141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 52141 transitions. [2022-01-18 06:20:20,514 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 52141 transitions. Word has length 30 [2022-01-18 06:20:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:20,514 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 52141 transitions. [2022-01-18 06:20:20,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 52141 transitions. [2022-01-18 06:20:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:20,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:20,537 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] [2022-01-18 06:20:20,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 06:20:20,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 06:20:20,738 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1465748903, now seen corresponding path program 51 times [2022-01-18 06:20:20,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:20,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805408714] [2022-01-18 06:20:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:20,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:20,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:20,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805408714] [2022-01-18 06:20:20,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805408714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:20,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505656058] [2022-01-18 06:20:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:20:20,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:20,927 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:20,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:20:20,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:20:20,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 06:20:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:21,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:20:21,220 INFO L353 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2022-01-18 06:20:21,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 06:20:21,442 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 06:20:21,443 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 33 treesize of output 41 [2022-01-18 06:20:21,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:21,461 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 71 treesize of output 83 [2022-01-18 06:20:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:21,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-01-18 06:20:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:22,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:22,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:22,621 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 126 treesize of output 151 [2022-01-18 06:20:22,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:22,658 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 102 treesize of output 127 [2022-01-18 06:20:22,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:22,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:22,671 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 925 treesize of output 861 [2022-01-18 06:20:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:32,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505656058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:32,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:32,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-01-18 06:20:32,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954098482] [2022-01-18 06:20:32,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:32,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:20:32,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:20:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:20:32,101 INFO L87 Difference]: Start difference. First operand 14400 states and 52141 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:36,033 INFO L93 Difference]: Finished difference Result 25864 states and 90108 transitions. [2022-01-18 06:20:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 06:20:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:36,104 INFO L225 Difference]: With dead ends: 25864 [2022-01-18 06:20:36,104 INFO L226 Difference]: Without dead ends: 25832 [2022-01-18 06:20:36,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1313, Invalid=6877, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 06:20:36,105 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 290 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1302 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:36,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 680 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1500 Invalid, 0 Unknown, 1302 Unchecked, 0.9s Time] [2022-01-18 06:20:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25832 states. [2022-01-18 06:20:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25832 to 14555. [2022-01-18 06:20:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14555 states, 14554 states have (on average 3.6130960560670604) internal successors, (52585), 14554 states have internal predecessors, (52585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14555 states to 14555 states and 52585 transitions. [2022-01-18 06:20:36,521 INFO L78 Accepts]: Start accepts. Automaton has 14555 states and 52585 transitions. Word has length 30 [2022-01-18 06:20:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 14555 states and 52585 transitions. [2022-01-18 06:20:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14555 states and 52585 transitions. [2022-01-18 06:20:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:20:36,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:36,546 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] [2022-01-18 06:20:36,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 06:20:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 06:20:36,747 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1700194329, now seen corresponding path program 52 times [2022-01-18 06:20:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139601753] [2022-01-18 06:20:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:37,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:37,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139601753] [2022-01-18 06:20:37,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139601753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:37,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269164350] [2022-01-18 06:20:37,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:20:37,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:37,037 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:37,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:20:37,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:20:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:20:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:37,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:20:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:37,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 06:20:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:37,473 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 45 treesize of output 33 [2022-01-18 06:20:37,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:37,476 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 37 treesize of output 25 [2022-01-18 06:20:37,568 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 24 treesize of output 16 [2022-01-18 06:20:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:37,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:37,827 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:20:37,827 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 78 treesize of output 97 [2022-01-18 06:20:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:37,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:20:37,849 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 60 treesize of output 83 [2022-01-18 06:20:37,858 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:20:37,858 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 878 treesize of output 830 [2022-01-18 06:20:38,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:38,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:38,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-01-18 06:20:38,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:38,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-01-18 06:20:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:20:38,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:38,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:20:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:38,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269164350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:38,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:38,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-01-18 06:20:38,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141158760] [2022-01-18 06:20:38,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:38,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:20:38,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:20:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:20:38,285 INFO L87 Difference]: Start difference. First operand 14555 states and 52585 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:39,367 INFO L93 Difference]: Finished difference Result 19873 states and 70314 transitions. [2022-01-18 06:20:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:20:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:20:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:39,416 INFO L225 Difference]: With dead ends: 19873 [2022-01-18 06:20:39,416 INFO L226 Difference]: Without dead ends: 19840 [2022-01-18 06:20:39,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:20:39,416 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:39,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 261 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:20:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2022-01-18 06:20:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 14402. [2022-01-18 06:20:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 3.616762724810777) internal successors, (52085), 14401 states have internal predecessors, (52085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 52085 transitions. [2022-01-18 06:20:39,708 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 52085 transitions. Word has length 30 [2022-01-18 06:20:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:39,708 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 52085 transitions. [2022-01-18 06:20:39,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 52085 transitions. [2022-01-18 06:20:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:39,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:39,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:39,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 06:20:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 06:20:39,933 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1959107467, now seen corresponding path program 53 times [2022-01-18 06:20:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267391123] [2022-01-18 06:20:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:39,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:39,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267391123] [2022-01-18 06:20:39,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267391123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958114637] [2022-01-18 06:20:39,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:20:39,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:39,975 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:39,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:20:40,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:20:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:20:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:40,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:40,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958114637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:40,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:40,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 06:20:40,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888175556] [2022-01-18 06:20:40,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:40,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:20:40,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:20:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:20:40,117 INFO L87 Difference]: Start difference. First operand 14402 states and 52085 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:40,350 INFO L93 Difference]: Finished difference Result 18934 states and 66901 transitions. [2022-01-18 06:20:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:20:40,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 32 [2022-01-18 06:20:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:40,395 INFO L225 Difference]: With dead ends: 18934 [2022-01-18 06:20:40,395 INFO L226 Difference]: Without dead ends: 18868 [2022-01-18 06:20:40,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:20:40,395 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:40,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:20:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18868 states. [2022-01-18 06:20:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18868 to 15192. [2022-01-18 06:20:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 3.615101046672372) internal successors, (54917), 15191 states have internal predecessors, (54917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 54917 transitions. [2022-01-18 06:20:40,690 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 54917 transitions. Word has length 32 [2022-01-18 06:20:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:40,690 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 54917 transitions. [2022-01-18 06:20:40,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 54917 transitions. [2022-01-18 06:20:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:40,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:40,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:40,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 06:20:40,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:40,916 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1104567263, now seen corresponding path program 54 times [2022-01-18 06:20:40,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:40,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094263687] [2022-01-18 06:20:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:40,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:40,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:40,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094263687] [2022-01-18 06:20:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094263687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:40,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980212459] [2022-01-18 06:20:40,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:20:40,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:40,964 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:40,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:20:41,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:20:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:20:41,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:41,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980212459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:41,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 06:20:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050625244] [2022-01-18 06:20:41,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:20:41,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:20:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:20:41,163 INFO L87 Difference]: Start difference. First operand 15192 states and 54917 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:42,824 INFO L93 Difference]: Finished difference Result 35953 states and 124062 transitions. [2022-01-18 06:20:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 06:20:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:20:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:42,919 INFO L225 Difference]: With dead ends: 35953 [2022-01-18 06:20:42,919 INFO L226 Difference]: Without dead ends: 35659 [2022-01-18 06:20:42,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1722, Invalid=7784, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 06:20:42,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 578 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:42,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:20:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35659 states. [2022-01-18 06:20:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35659 to 25698. [2022-01-18 06:20:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25698 states, 25697 states have (on average 3.710900105070631) internal successors, (95359), 25697 states have internal predecessors, (95359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25698 states to 25698 states and 95359 transitions. [2022-01-18 06:20:43,619 INFO L78 Accepts]: Start accepts. Automaton has 25698 states and 95359 transitions. Word has length 32 [2022-01-18 06:20:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:43,619 INFO L470 AbstractCegarLoop]: Abstraction has 25698 states and 95359 transitions. [2022-01-18 06:20:43,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 25698 states and 95359 transitions. [2022-01-18 06:20:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:43,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:43,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:43,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 06:20:43,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:43,863 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1606264049, now seen corresponding path program 55 times [2022-01-18 06:20:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049507904] [2022-01-18 06:20:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:43,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:43,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049507904] [2022-01-18 06:20:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049507904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809008920] [2022-01-18 06:20:43,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:20:43,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:43,896 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:43,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 06:20:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:20:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:43,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:44,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809008920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:44,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:44,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:20:44,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551182721] [2022-01-18 06:20:44,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:44,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:20:44,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:20:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:20:44,046 INFO L87 Difference]: Start difference. First operand 25698 states and 95359 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:44,268 INFO L93 Difference]: Finished difference Result 27246 states and 99861 transitions. [2022-01-18 06:20:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:20:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 32 [2022-01-18 06:20:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:44,493 INFO L225 Difference]: With dead ends: 27246 [2022-01-18 06:20:44,494 INFO L226 Difference]: Without dead ends: 27222 [2022-01-18 06:20:44,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:20:44,495 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:44,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 119 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:20:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27222 states. [2022-01-18 06:20:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27222 to 25622. [2022-01-18 06:20:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 3.71164279302135) internal successors, (95096), 25621 states have internal predecessors, (95096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 95096 transitions. [2022-01-18 06:20:45,315 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 95096 transitions. Word has length 32 [2022-01-18 06:20:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:45,315 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 95096 transitions. [2022-01-18 06:20:45,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 95096 transitions. [2022-01-18 06:20:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:45,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:45,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:45,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 06:20:45,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:45,558 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 252646705, now seen corresponding path program 56 times [2022-01-18 06:20:45,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:45,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580946955] [2022-01-18 06:20:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:45,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:45,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:45,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580946955] [2022-01-18 06:20:45,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580946955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:45,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552771457] [2022-01-18 06:20:45,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:20:45,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:45,597 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:45,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 06:20:45,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:20:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:20:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:45,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:20:45,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552771457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:45,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:45,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-01-18 06:20:45,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138476015] [2022-01-18 06:20:45,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:45,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:20:45,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:20:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:20:45,786 INFO L87 Difference]: Start difference. First operand 25622 states and 95096 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:47,532 INFO L93 Difference]: Finished difference Result 79810 states and 282459 transitions. [2022-01-18 06:20:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:20:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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 32 [2022-01-18 06:20:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:47,975 INFO L225 Difference]: With dead ends: 79810 [2022-01-18 06:20:47,976 INFO L226 Difference]: Without dead ends: 79786 [2022-01-18 06:20:47,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:20:47,976 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 494 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:47,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 250 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:20:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79786 states. [2022-01-18 06:20:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79786 to 35022. [2022-01-18 06:20:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35022 states, 35021 states have (on average 3.7379572256646014) internal successors, (130907), 35021 states have internal predecessors, (130907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35022 states to 35022 states and 130907 transitions. [2022-01-18 06:20:49,427 INFO L78 Accepts]: Start accepts. Automaton has 35022 states and 130907 transitions. Word has length 32 [2022-01-18 06:20:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:49,427 INFO L470 AbstractCegarLoop]: Abstraction has 35022 states and 130907 transitions. [2022-01-18 06:20:49,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35022 states and 130907 transitions. [2022-01-18 06:20:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:49,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:49,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:49,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 06:20:49,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-18 06:20:49,696 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 58249501, now seen corresponding path program 57 times [2022-01-18 06:20:49,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299925977] [2022-01-18 06:20:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:49,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:20:49,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299925977] [2022-01-18 06:20:49,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299925977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:49,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37901944] [2022-01-18 06:20:49,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:20:49,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:49,749 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 06:20:49,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 06:20:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 06:20:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:49,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:50,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37901944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:50,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:50,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 10 [2022-01-18 06:20:50,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589200076] [2022-01-18 06:20:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:50,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:20:50,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:20:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:20:50,087 INFO L87 Difference]: Start difference. First operand 35022 states and 130907 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:51,450 INFO L93 Difference]: Finished difference Result 88617 states and 320525 transitions. [2022-01-18 06:20:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 06:20:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 32 [2022-01-18 06:20:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:51,967 INFO L225 Difference]: With dead ends: 88617 [2022-01-18 06:20:51,967 INFO L226 Difference]: Without dead ends: 88165 [2022-01-18 06:20:51,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:20:51,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 596 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:51,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 158 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:20:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88165 states. [2022-01-18 06:20:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88165 to 53900. [2022-01-18 06:20:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53900 states, 53899 states have (on average 3.7885860591105587) internal successors, (204201), 53899 states have internal predecessors, (204201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53900 states to 53900 states and 204201 transitions. [2022-01-18 06:20:54,168 INFO L78 Accepts]: Start accepts. Automaton has 53900 states and 204201 transitions. Word has length 32 [2022-01-18 06:20:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:20:54,168 INFO L470 AbstractCegarLoop]: Abstraction has 53900 states and 204201 transitions. [2022-01-18 06:20:54,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 53900 states and 204201 transitions. [2022-01-18 06:20:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:20:54,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:20:54,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:20:54,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 06:20:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 06:20:54,455 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:20:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:20:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1948005981, now seen corresponding path program 58 times [2022-01-18 06:20:54,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:20:54,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420142061] [2022-01-18 06:20:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:20:54,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:20:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:20:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:20:54,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:20:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420142061] [2022-01-18 06:20:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420142061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:20:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507428084] [2022-01-18 06:20:54,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:20:54,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:20:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:20:54,492 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:20:54,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 06:20:54,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:20:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:20:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:20:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:20:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:54,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:20:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:20:54,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507428084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:20:54,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:20:54,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 06:20:54,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142492418] [2022-01-18 06:20:54,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:20:54,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:20:54,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:20:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:20:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:20:54,687 INFO L87 Difference]: Start difference. First operand 53900 states and 204201 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:20:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:20:56,712 INFO L93 Difference]: Finished difference Result 126257 states and 472403 transitions. [2022-01-18 06:20:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 06:20:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 32 [2022-01-18 06:20:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:20:57,696 INFO L225 Difference]: With dead ends: 126257 [2022-01-18 06:20:57,697 INFO L226 Difference]: Without dead ends: 125683 [2022-01-18 06:20:57,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:20:57,697 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 752 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:20:57,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 151 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:20:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125683 states. [2022-01-18 06:21:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125683 to 99474. [2022-01-18 06:21:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99474 states, 99473 states have (on average 3.860756185095453) internal successors, (384041), 99473 states have internal predecessors, (384041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99474 states to 99474 states and 384041 transitions. [2022-01-18 06:21:01,922 INFO L78 Accepts]: Start accepts. Automaton has 99474 states and 384041 transitions. Word has length 32 [2022-01-18 06:21:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:01,922 INFO L470 AbstractCegarLoop]: Abstraction has 99474 states and 384041 transitions. [2022-01-18 06:21:01,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 99474 states and 384041 transitions. [2022-01-18 06:21:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:02,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:02,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:02,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 06:21:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:02,263 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1979731235, now seen corresponding path program 59 times [2022-01-18 06:21:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61570350] [2022-01-18 06:21:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:02,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:02,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61570350] [2022-01-18 06:21:02,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61570350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022311136] [2022-01-18 06:21:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:21:02,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:02,295 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:02,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 06:21:02,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:21:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:02,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022311136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:02,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:02,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:21:02,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661888958] [2022-01-18 06:21:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:02,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:21:02,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:21:02,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:21:02,434 INFO L87 Difference]: Start difference. First operand 99474 states and 384041 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:03,707 INFO L93 Difference]: Finished difference Result 125056 states and 477423 transitions. [2022-01-18 06:21:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:21:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 32 [2022-01-18 06:21:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:04,286 INFO L225 Difference]: With dead ends: 125056 [2022-01-18 06:21:04,286 INFO L226 Difference]: Without dead ends: 125056 [2022-01-18 06:21:04,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:21:04,286 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:04,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125056 states. [2022-01-18 06:21:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125056 to 106002. [2022-01-18 06:21:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106002 states, 106001 states have (on average 3.8668974820992257) internal successors, (409895), 106001 states have internal predecessors, (409895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106002 states to 106002 states and 409895 transitions. [2022-01-18 06:21:08,618 INFO L78 Accepts]: Start accepts. Automaton has 106002 states and 409895 transitions. Word has length 32 [2022-01-18 06:21:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 106002 states and 409895 transitions. [2022-01-18 06:21:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 106002 states and 409895 transitions. [2022-01-18 06:21:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:08,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:08,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:08,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 06:21:08,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:08,987 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1813915461, now seen corresponding path program 60 times [2022-01-18 06:21:08,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:08,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416680462] [2022-01-18 06:21:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:08,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:21:09,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416680462] [2022-01-18 06:21:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416680462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758402080] [2022-01-18 06:21:09,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:21:09,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:09,020 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:09,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 06:21:09,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:21:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:21:09,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 06:21:09,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758402080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:09,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:09,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 06:21:09,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394365593] [2022-01-18 06:21:09,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:09,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:21:09,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:21:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:21:09,164 INFO L87 Difference]: Start difference. First operand 106002 states and 409895 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:11,324 INFO L93 Difference]: Finished difference Result 147426 states and 553881 transitions. [2022-01-18 06:21:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:21:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 32 [2022-01-18 06:21:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:12,004 INFO L225 Difference]: With dead ends: 147426 [2022-01-18 06:21:12,004 INFO L226 Difference]: Without dead ends: 147296 [2022-01-18 06:21:12,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 06:21:12,005 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 499 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:12,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 199 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:21:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147296 states. [2022-01-18 06:21:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147296 to 112553. [2022-01-18 06:21:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112553 states, 112552 states have (on average 3.8479991470609143) internal successors, (433100), 112552 states have internal predecessors, (433100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112553 states to 112553 states and 433100 transitions. [2022-01-18 06:21:16,891 INFO L78 Accepts]: Start accepts. Automaton has 112553 states and 433100 transitions. Word has length 32 [2022-01-18 06:21:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:16,892 INFO L470 AbstractCegarLoop]: Abstraction has 112553 states and 433100 transitions. [2022-01-18 06:21:16,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 112553 states and 433100 transitions. [2022-01-18 06:21:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:17,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:17,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:17,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 06:21:17,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 06:21:17,295 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1955119675, now seen corresponding path program 61 times [2022-01-18 06:21:17,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:17,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970395131] [2022-01-18 06:21:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:17,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:17,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970395131] [2022-01-18 06:21:17,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970395131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549934678] [2022-01-18 06:21:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:21:17,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:17,328 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:17,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 06:21:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:17,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:17,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549934678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:17,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:17,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:21:17,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623753605] [2022-01-18 06:21:17,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:21:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:21:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:21:17,471 INFO L87 Difference]: Start difference. First operand 112553 states and 433100 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:18,870 INFO L93 Difference]: Finished difference Result 128721 states and 491820 transitions. [2022-01-18 06:21:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:21:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 32 [2022-01-18 06:21:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:19,559 INFO L225 Difference]: With dead ends: 128721 [2022-01-18 06:21:19,559 INFO L226 Difference]: Without dead ends: 128703 [2022-01-18 06:21:19,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:21:19,560 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:19,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 88 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128703 states. [2022-01-18 06:21:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128703 to 119800. [2022-01-18 06:21:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119800 states, 119799 states have (on average 3.8597901484987354) internal successors, (462399), 119799 states have internal predecessors, (462399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119800 states to 119800 states and 462399 transitions. [2022-01-18 06:21:23,810 INFO L78 Accepts]: Start accepts. Automaton has 119800 states and 462399 transitions. Word has length 32 [2022-01-18 06:21:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:23,810 INFO L470 AbstractCegarLoop]: Abstraction has 119800 states and 462399 transitions. [2022-01-18 06:21:23,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 119800 states and 462399 transitions. [2022-01-18 06:21:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:23,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:23,987 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:24,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 06:21:24,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 06:21:24,188 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash -804316941, now seen corresponding path program 62 times [2022-01-18 06:21:24,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70372340] [2022-01-18 06:21:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:24,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:24,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70372340] [2022-01-18 06:21:24,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70372340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746010822] [2022-01-18 06:21:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:21:24,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:24,235 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:24,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 06:21:24,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:21:24,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:24,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:24,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746010822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:24,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:24,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-01-18 06:21:24,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336666233] [2022-01-18 06:21:24,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:24,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:21:24,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:21:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:21:24,390 INFO L87 Difference]: Start difference. First operand 119800 states and 462399 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:28,704 INFO L93 Difference]: Finished difference Result 306930 states and 1138918 transitions. [2022-01-18 06:21:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:21:28,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:21:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:30,396 INFO L225 Difference]: With dead ends: 306930 [2022-01-18 06:21:30,397 INFO L226 Difference]: Without dead ends: 306766 [2022-01-18 06:21:30,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:21:30,398 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 504 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:30,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 280 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:21:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306766 states. [2022-01-18 06:21:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306766 to 209656. [2022-01-18 06:21:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209656 states, 209655 states have (on average 3.8897665211895736) internal successors, (815509), 209655 states have internal predecessors, (815509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209656 states to 209656 states and 815509 transitions. [2022-01-18 06:21:41,828 INFO L78 Accepts]: Start accepts. Automaton has 209656 states and 815509 transitions. Word has length 32 [2022-01-18 06:21:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 209656 states and 815509 transitions. [2022-01-18 06:21:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 209656 states and 815509 transitions. [2022-01-18 06:21:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:42,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:42,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:42,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 06:21:42,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:42,292 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -593546441, now seen corresponding path program 63 times [2022-01-18 06:21:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680162562] [2022-01-18 06:21:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:42,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:42,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:42,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680162562] [2022-01-18 06:21:42,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680162562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:42,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845835764] [2022-01-18 06:21:42,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:21:42,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:42,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:42,337 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:42,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 06:21:42,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 06:21:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845835764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:42,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:42,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-01-18 06:21:42,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535726147] [2022-01-18 06:21:42,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:42,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:21:42,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:21:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:21:42,500 INFO L87 Difference]: Start difference. First operand 209656 states and 815509 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:46,988 INFO L93 Difference]: Finished difference Result 304768 states and 1123004 transitions. [2022-01-18 06:21:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:21:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:21:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:48,607 INFO L225 Difference]: With dead ends: 304768 [2022-01-18 06:21:48,608 INFO L226 Difference]: Without dead ends: 304472 [2022-01-18 06:21:48,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1313, Invalid=3943, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:21:48,608 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 625 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:48,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 353 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:21:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304472 states. [2022-01-18 06:21:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304472 to 149380. [2022-01-18 06:21:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149380 states, 149379 states have (on average 3.857938532189933) internal successors, (576295), 149379 states have internal predecessors, (576295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149380 states to 149380 states and 576295 transitions. [2022-01-18 06:21:57,074 INFO L78 Accepts]: Start accepts. Automaton has 149380 states and 576295 transitions. Word has length 32 [2022-01-18 06:21:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:57,074 INFO L470 AbstractCegarLoop]: Abstraction has 149380 states and 576295 transitions. [2022-01-18 06:21:57,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 149380 states and 576295 transitions. [2022-01-18 06:21:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:57,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:57,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:57,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 06:21:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-18 06:21:57,427 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:21:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 785955533, now seen corresponding path program 64 times [2022-01-18 06:21:57,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:57,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206975351] [2022-01-18 06:21:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:57,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:57,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206975351] [2022-01-18 06:21:57,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206975351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900178305] [2022-01-18 06:21:57,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:21:57,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:57,458 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:21:57,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 06:21:57,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:21:57,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:21:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900178305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:57,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:57,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 06:21:57,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555125846] [2022-01-18 06:21:57,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:57,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 06:21:57,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 06:21:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:21:57,604 INFO L87 Difference]: Start difference. First operand 149380 states and 576295 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:59,414 INFO L93 Difference]: Finished difference Result 159580 states and 608890 transitions. [2022-01-18 06:21:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:21:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:21:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:00,772 INFO L225 Difference]: With dead ends: 159580 [2022-01-18 06:22:00,772 INFO L226 Difference]: Without dead ends: 159562 [2022-01-18 06:22:00,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:22:00,773 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:00,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:22:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159562 states. [2022-01-18 06:22:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159562 to 148130. [2022-01-18 06:22:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148130 states, 148129 states have (on average 3.840368867676147) internal successors, (568870), 148129 states have internal predecessors, (568870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148130 states to 148130 states and 568870 transitions. [2022-01-18 06:22:05,774 INFO L78 Accepts]: Start accepts. Automaton has 148130 states and 568870 transitions. Word has length 32 [2022-01-18 06:22:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:05,775 INFO L470 AbstractCegarLoop]: Abstraction has 148130 states and 568870 transitions. [2022-01-18 06:22:05,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 148130 states and 568870 transitions. [2022-01-18 06:22:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:22:05,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:05,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:05,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:06,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:06,129 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:22:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1387084889, now seen corresponding path program 65 times [2022-01-18 06:22:06,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:06,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322071363] [2022-01-18 06:22:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:06,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:06,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:06,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322071363] [2022-01-18 06:22:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322071363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:06,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651676110] [2022-01-18 06:22:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:22:06,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:06,171 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:22:06,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 06:22:06,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:22:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:22:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:06,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:06,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651676110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:06,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:06,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 06:22:06,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406383914] [2022-01-18 06:22:06,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:06,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:22:06,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:22:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:22:06,311 INFO L87 Difference]: Start difference. First operand 148130 states and 568870 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:08,139 INFO L93 Difference]: Finished difference Result 164627 states and 624211 transitions. [2022-01-18 06:22:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:22:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:22:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:08,980 INFO L225 Difference]: With dead ends: 164627 [2022-01-18 06:22:08,980 INFO L226 Difference]: Without dead ends: 164471 [2022-01-18 06:22:08,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:22:08,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:08,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 57 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:22:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164471 states. [2022-01-18 06:22:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164471 to 155402. [2022-01-18 06:22:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155402 states, 155401 states have (on average 3.8356831680619816) internal successors, (596069), 155401 states have internal predecessors, (596069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155402 states to 155402 states and 596069 transitions. [2022-01-18 06:22:15,279 INFO L78 Accepts]: Start accepts. Automaton has 155402 states and 596069 transitions. Word has length 32 [2022-01-18 06:22:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:15,279 INFO L470 AbstractCegarLoop]: Abstraction has 155402 states and 596069 transitions. [2022-01-18 06:22:15,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 155402 states and 596069 transitions. [2022-01-18 06:22:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:22:15,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:15,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:15,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:15,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:15,790 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:22:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1733314855, now seen corresponding path program 66 times [2022-01-18 06:22:15,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:15,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672167854] [2022-01-18 06:22:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:15,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:15,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672167854] [2022-01-18 06:22:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672167854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748966536] [2022-01-18 06:22:15,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:22:15,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:15,836 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:22:15,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 06:22:15,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:22:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:22:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:22:15,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:22:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748966536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:16,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:16,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:22:16,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752722784] [2022-01-18 06:22:16,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:16,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:22:16,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:16,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:22:16,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:22:16,027 INFO L87 Difference]: Start difference. First operand 155402 states and 596069 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:18,283 INFO L93 Difference]: Finished difference Result 181166 states and 684577 transitions. [2022-01-18 06:22:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:22:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:22:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:19,535 INFO L225 Difference]: With dead ends: 181166 [2022-01-18 06:22:19,535 INFO L226 Difference]: Without dead ends: 181166 [2022-01-18 06:22:19,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:22:19,536 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:19,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:22:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181166 states. [2022-01-18 06:22:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181166 to 155312. [2022-01-18 06:22:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155312 states, 155311 states have (on average 3.8357875488535904) internal successors, (595740), 155311 states have internal predecessors, (595740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155312 states to 155312 states and 595740 transitions. [2022-01-18 06:22:25,650 INFO L78 Accepts]: Start accepts. Automaton has 155312 states and 595740 transitions. Word has length 32 [2022-01-18 06:22:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:25,650 INFO L470 AbstractCegarLoop]: Abstraction has 155312 states and 595740 transitions. [2022-01-18 06:22:25,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 155312 states and 595740 transitions. [2022-01-18 06:22:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:22:25,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:25,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:25,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:26,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 06:22:26,026 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:22:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1439066337, now seen corresponding path program 67 times [2022-01-18 06:22:26,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:26,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143817395] [2022-01-18 06:22:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:26,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143817395] [2022-01-18 06:22:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143817395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965547859] [2022-01-18 06:22:26,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:22:26,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:26,076 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:22:26,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 06:22:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:22:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:22:26,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:22:26,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965547859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:26,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:26,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 06:22:26,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523941340] [2022-01-18 06:22:26,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:26,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:22:26,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:22:26,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:22:26,245 INFO L87 Difference]: Start difference. First operand 155312 states and 595740 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:29,609 INFO L93 Difference]: Finished difference Result 226844 states and 855043 transitions. [2022-01-18 06:22:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 06:22:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 32 [2022-01-18 06:22:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:31,374 INFO L225 Difference]: With dead ends: 226844 [2022-01-18 06:22:31,374 INFO L226 Difference]: Without dead ends: 226494 [2022-01-18 06:22:31,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1367, Invalid=5605, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 06:22:31,375 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 741 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:31,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 195 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:22:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226494 states. [2022-01-18 06:22:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226494 to 172378. [2022-01-18 06:22:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172378 states, 172377 states have (on average 3.8375131253009394) internal successors, (661499), 172377 states have internal predecessors, (661499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172378 states to 172378 states and 661499 transitions. [2022-01-18 06:22:38,338 INFO L78 Accepts]: Start accepts. Automaton has 172378 states and 661499 transitions. Word has length 32 [2022-01-18 06:22:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:38,338 INFO L470 AbstractCegarLoop]: Abstraction has 172378 states and 661499 transitions. [2022-01-18 06:22:38,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 172378 states and 661499 transitions. [2022-01-18 06:22:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:22:38,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:38,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:38,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:38,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:38,740 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:22:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -957000355, now seen corresponding path program 68 times [2022-01-18 06:22:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159987625] [2022-01-18 06:22:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:38,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:38,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:38,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159987625] [2022-01-18 06:22:38,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159987625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:38,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214382279] [2022-01-18 06:22:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:22:38,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:38,777 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:22:38,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 06:22:38,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:22:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:22:38,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:22:38,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:22:38,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214382279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:38,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:22:38,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056946130] [2022-01-18 06:22:38,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:38,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:22:38,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:22:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:22:38,912 INFO L87 Difference]: Start difference. First operand 172378 states and 661499 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:40,865 INFO L93 Difference]: Finished difference Result 180248 states and 686520 transitions. [2022-01-18 06:22:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:22:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 32 [2022-01-18 06:22:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:41,766 INFO L225 Difference]: With dead ends: 180248 [2022-01-18 06:22:41,766 INFO L226 Difference]: Without dead ends: 180232 [2022-01-18 06:22:41,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:22:41,767 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:41,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 95 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:22:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180232 states. [2022-01-18 06:22:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180232 to 172711. [2022-01-18 06:22:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172711 states, 172710 states have (on average 3.8327543280643854) internal successors, (661955), 172710 states have internal predecessors, (661955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172711 states to 172711 states and 661955 transitions. [2022-01-18 06:22:47,982 INFO L78 Accepts]: Start accepts. Automaton has 172711 states and 661955 transitions. Word has length 32 [2022-01-18 06:22:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:47,982 INFO L470 AbstractCegarLoop]: Abstraction has 172711 states and 661955 transitions. [2022-01-18 06:22:47,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 172711 states and 661955 transitions. [2022-01-18 06:22:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:22:48,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:48,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:48,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:48,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:48,370 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:22:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 851154315, now seen corresponding path program 69 times [2022-01-18 06:22:48,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457805253] [2022-01-18 06:22:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:48,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:48,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457805253] [2022-01-18 06:22:48,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457805253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396262127] [2022-01-18 06:22:48,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:22:48,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:48,408 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:22:48,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 06:22:48,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:22:48,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:22:48,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:48,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:22:48,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396262127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:48,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:48,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 06:22:48,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346052935] [2022-01-18 06:22:48,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:48,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:22:48,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:22:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:22:48,551 INFO L87 Difference]: Start difference. First operand 172711 states and 661955 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:51,695 INFO L93 Difference]: Finished difference Result 248684 states and 950787 transitions. [2022-01-18 06:22:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:22:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 33 [2022-01-18 06:22:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:53,070 INFO L225 Difference]: With dead ends: 248684 [2022-01-18 06:22:53,070 INFO L226 Difference]: Without dead ends: 246168 [2022-01-18 06:22:53,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:22:53,071 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:53,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 67 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:22:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246168 states. [2022-01-18 06:23:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246168 to 240164. [2022-01-18 06:23:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240164 states, 240163 states have (on average 3.7435783197245205) internal successors, (899069), 240163 states have internal predecessors, (899069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240164 states to 240164 states and 899069 transitions. [2022-01-18 06:23:03,272 INFO L78 Accepts]: Start accepts. Automaton has 240164 states and 899069 transitions. Word has length 33 [2022-01-18 06:23:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:03,273 INFO L470 AbstractCegarLoop]: Abstraction has 240164 states and 899069 transitions. [2022-01-18 06:23:03,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 240164 states and 899069 transitions. [2022-01-18 06:23:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:23:03,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:03,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:03,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:03,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:03,742 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:23:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -874131995, now seen corresponding path program 70 times [2022-01-18 06:23:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407689672] [2022-01-18 06:23:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:03,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:23:03,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:03,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407689672] [2022-01-18 06:23:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407689672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838495194] [2022-01-18 06:23:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:23:03,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:03,786 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:23:03,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 06:23:03,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:23:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:23:03,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 06:23:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838495194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:03,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:03,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:23:03,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516663936] [2022-01-18 06:23:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:03,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:23:03,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:23:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:23:03,943 INFO L87 Difference]: Start difference. First operand 240164 states and 899069 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:07,899 INFO L93 Difference]: Finished difference Result 366756 states and 1359341 transitions. [2022-01-18 06:23:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:23:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:23:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:09,976 INFO L225 Difference]: With dead ends: 366756 [2022-01-18 06:23:09,976 INFO L226 Difference]: Without dead ends: 365198 [2022-01-18 06:23:09,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:23:09,977 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:09,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:23:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365198 states. [2022-01-18 06:23:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365198 to 337452. [2022-01-18 06:23:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337452 states, 337451 states have (on average 3.7411861277637346) internal successors, (1262467), 337451 states have internal predecessors, (1262467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337452 states to 337452 states and 1262467 transitions. [2022-01-18 06:23:24,948 INFO L78 Accepts]: Start accepts. Automaton has 337452 states and 1262467 transitions. Word has length 33 [2022-01-18 06:23:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 337452 states and 1262467 transitions. [2022-01-18 06:23:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 337452 states and 1262467 transitions. [2022-01-18 06:23:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:23:25,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:25,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:25,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:25,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 06:23:25,775 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:23:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 257831969, now seen corresponding path program 71 times [2022-01-18 06:23:25,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146086998] [2022-01-18 06:23:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 06:23:25,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:25,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146086998] [2022-01-18 06:23:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146086998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:25,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461160423] [2022-01-18 06:23:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:23:25,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:25,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:25,855 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:23:25,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 06:23:25,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:23:25,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:25,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:23:25,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:23:26,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461160423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:26,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:26,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:23:26,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137669949] [2022-01-18 06:23:26,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:26,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:23:26,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:23:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:23:26,063 INFO L87 Difference]: Start difference. First operand 337452 states and 1262467 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:31,574 INFO L93 Difference]: Finished difference Result 366031 states and 1351232 transitions. [2022-01-18 06:23:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:23:31,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:23:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:35,479 INFO L225 Difference]: With dead ends: 366031 [2022-01-18 06:23:35,480 INFO L226 Difference]: Without dead ends: 365962 [2022-01-18 06:23:35,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:23:35,480 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:35,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:23:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365962 states. [2022-01-18 06:23:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365962 to 335889. [2022-01-18 06:23:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335889 states, 335888 states have (on average 3.7307703758395654) internal successors, (1253121), 335888 states have internal predecessors, (1253121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335889 states to 335889 states and 1253121 transitions. [2022-01-18 06:23:48,387 INFO L78 Accepts]: Start accepts. Automaton has 335889 states and 1253121 transitions. Word has length 33 [2022-01-18 06:23:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:48,387 INFO L470 AbstractCegarLoop]: Abstraction has 335889 states and 1253121 transitions. [2022-01-18 06:23:48,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 335889 states and 1253121 transitions. [2022-01-18 06:23:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 06:23:48,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:48,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:48,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:48,916 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:23:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2021221787, now seen corresponding path program 72 times [2022-01-18 06:23:48,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:48,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532885542] [2022-01-18 06:23:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:48,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:23:48,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532885542] [2022-01-18 06:23:48,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532885542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801410945] [2022-01-18 06:23:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:23:48,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:48,975 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:23:48,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 06:23:49,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:23:49,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:49,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:49,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:49,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801410945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:49,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:49,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-01-18 06:23:49,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206128753] [2022-01-18 06:23:49,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:23:49,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:23:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:23:49,187 INFO L87 Difference]: Start difference. First operand 335889 states and 1253121 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:51,345 INFO L93 Difference]: Finished difference Result 174680 states and 650006 transitions. [2022-01-18 06:23:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:23:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 06:23:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:52,705 INFO L225 Difference]: With dead ends: 174680 [2022-01-18 06:23:52,706 INFO L226 Difference]: Without dead ends: 173859 [2022-01-18 06:23:52,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:23:52,706 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 216 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:23:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173859 states. [2022-01-18 06:23:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173859 to 158612. [2022-01-18 06:23:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158612 states, 158611 states have (on average 3.7746562344351906) internal successors, (598702), 158611 states have internal predecessors, (598702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158612 states to 158612 states and 598702 transitions. [2022-01-18 06:23:59,216 INFO L78 Accepts]: Start accepts. Automaton has 158612 states and 598702 transitions. Word has length 33 [2022-01-18 06:23:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:59,217 INFO L470 AbstractCegarLoop]: Abstraction has 158612 states and 598702 transitions. [2022-01-18 06:23:59,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 158612 states and 598702 transitions. [2022-01-18 06:23:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:59,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:59,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:59,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:59,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:59,590 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:23:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -657949277, now seen corresponding path program 73 times [2022-01-18 06:23:59,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833035302] [2022-01-18 06:23:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:59,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 06:23:59,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833035302] [2022-01-18 06:23:59,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833035302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538264133] [2022-01-18 06:23:59,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:23:59,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:59,613 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:23:59,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 06:23:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:23:59,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:23:59,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:23:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538264133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:59,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:59,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-01-18 06:23:59,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572364544] [2022-01-18 06:23:59,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:23:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:23:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:23:59,826 INFO L87 Difference]: Start difference. First operand 158612 states and 598702 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:02,697 INFO L93 Difference]: Finished difference Result 248922 states and 921595 transitions. [2022-01-18 06:24:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:24:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:24:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:03,973 INFO L225 Difference]: With dead ends: 248922 [2022-01-18 06:24:03,973 INFO L226 Difference]: Without dead ends: 246356 [2022-01-18 06:24:03,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:24:03,973 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 300 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:03,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 112 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:24:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246356 states. [2022-01-18 06:24:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246356 to 122359. [2022-01-18 06:24:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122359 states, 122358 states have (on average 3.7970218539041176) internal successors, (464596), 122358 states have internal predecessors, (464596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122359 states to 122359 states and 464596 transitions. [2022-01-18 06:24:09,131 INFO L78 Accepts]: Start accepts. Automaton has 122359 states and 464596 transitions. Word has length 34 [2022-01-18 06:24:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:09,131 INFO L470 AbstractCegarLoop]: Abstraction has 122359 states and 464596 transitions. [2022-01-18 06:24:09,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 122359 states and 464596 transitions. [2022-01-18 06:24:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 06:24:10,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:24:10,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:24:10,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 06:24:10,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-01-18 06:24:10,243 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:24:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:24:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1223761653, now seen corresponding path program 74 times [2022-01-18 06:24:10,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:24:10,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14248066] [2022-01-18 06:24:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:24:10,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:24:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:24:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:24:10,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:24:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14248066] [2022-01-18 06:24:10,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14248066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:24:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76857527] [2022-01-18 06:24:10,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:24:10,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:24:10,283 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:24:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 06:24:10,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:24:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:24:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:24:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:24:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:24:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:24:10,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76857527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:24:10,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:24:10,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 06:24:10,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125883843] [2022-01-18 06:24:10,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:24:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 06:24:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:24:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 06:24:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:24:10,468 INFO L87 Difference]: Start difference. First operand 122359 states and 464596 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:11,506 INFO L93 Difference]: Finished difference Result 128866 states and 487336 transitions. [2022-01-18 06:24:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:24:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 06:24:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:12,063 INFO L225 Difference]: With dead ends: 128866 [2022-01-18 06:24:12,063 INFO L226 Difference]: Without dead ends: 128688 [2022-01-18 06:24:12,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:24:12,064 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:12,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 67 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:24:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128688 states. [2022-01-18 06:24:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128688 to 127321. [2022-01-18 06:24:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127321 states, 127320 states have (on average 3.7852419101476595) internal successors, (481937), 127320 states have internal predecessors, (481937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127321 states to 127321 states and 481937 transitions. [2022-01-18 06:24:16,395 INFO L78 Accepts]: Start accepts. Automaton has 127321 states and 481937 transitions. Word has length 35 [2022-01-18 06:24:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:16,395 INFO L470 AbstractCegarLoop]: Abstraction has 127321 states and 481937 transitions. [2022-01-18 06:24:16,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 127321 states and 481937 transitions. [2022-01-18 06:24:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 06:24:16,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:24:16,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:24:16,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 06:24:16,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:16,737 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:24:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:24:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -524603823, now seen corresponding path program 75 times [2022-01-18 06:24:16,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:24:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956701110] [2022-01-18 06:24:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:24:16,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:24:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:24:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:16,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:24:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956701110] [2022-01-18 06:24:16,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956701110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:24:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728906806] [2022-01-18 06:24:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:24:16,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:24:16,783 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:24:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 06:24:16,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:24:16,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:24:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:24:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:24:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:24:16,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:24:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728906806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:24:16,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:24:16,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 8 [2022-01-18 06:24:16,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834277214] [2022-01-18 06:24:16,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:24:16,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:24:16,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:24:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:24:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:24:16,923 INFO L87 Difference]: Start difference. First operand 127321 states and 481937 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:19,216 INFO L93 Difference]: Finished difference Result 151882 states and 564771 transitions. [2022-01-18 06:24:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 06:24:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 06:24:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:20,244 INFO L225 Difference]: With dead ends: 151882 [2022-01-18 06:24:20,244 INFO L226 Difference]: Without dead ends: 151789 [2022-01-18 06:24:20,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:24:20,245 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:20,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 85 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:24:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151789 states. [2022-01-18 06:24:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151789 to 141713. [2022-01-18 06:24:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141713 states, 141712 states have (on average 3.790561138082872) internal successors, (537168), 141712 states have internal predecessors, (537168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141713 states to 141713 states and 537168 transitions. [2022-01-18 06:24:24,912 INFO L78 Accepts]: Start accepts. Automaton has 141713 states and 537168 transitions. Word has length 35 [2022-01-18 06:24:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:24,912 INFO L470 AbstractCegarLoop]: Abstraction has 141713 states and 537168 transitions. [2022-01-18 06:24:24,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 141713 states and 537168 transitions. [2022-01-18 06:24:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 06:24:25,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:24:25,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:24:25,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 06:24:25,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:25,286 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:24:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:24:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1010926857, now seen corresponding path program 76 times [2022-01-18 06:24:25,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:24:25,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197528716] [2022-01-18 06:24:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:24:25,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:24:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:24:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:25,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:24:25,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197528716] [2022-01-18 06:24:25,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197528716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:24:25,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831145378] [2022-01-18 06:24:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:24:25,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:24:25,350 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:24:25,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 06:24:25,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:24:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:24:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:24:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:24:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:24:25,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:24:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831145378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:24:25,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:24:25,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 06:24:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236307221] [2022-01-18 06:24:25,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:24:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:24:25,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:24:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:24:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:24:25,560 INFO L87 Difference]: Start difference. First operand 141713 states and 537168 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:27,834 INFO L93 Difference]: Finished difference Result 162739 states and 597618 transitions. [2022-01-18 06:24:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:24:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 06:24:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:28,610 INFO L225 Difference]: With dead ends: 162739 [2022-01-18 06:24:28,610 INFO L226 Difference]: Without dead ends: 162639 [2022-01-18 06:24:28,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 06:24:28,611 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 299 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:28,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 229 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:24:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162639 states. [2022-01-18 06:24:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162639 to 141374. [2022-01-18 06:24:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141374 states, 141373 states have (on average 3.7643538723801573) internal successors, (532178), 141373 states have internal predecessors, (532178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141374 states to 141374 states and 532178 transitions. [2022-01-18 06:24:33,346 INFO L78 Accepts]: Start accepts. Automaton has 141374 states and 532178 transitions. Word has length 35 [2022-01-18 06:24:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 141374 states and 532178 transitions. [2022-01-18 06:24:33,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 141374 states and 532178 transitions. [2022-01-18 06:24:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:24:34,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:24:34,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:24:34,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 06:24:34,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:34,519 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:24:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:24:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 47340655, now seen corresponding path program 77 times [2022-01-18 06:24:34,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:24:34,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280097185] [2022-01-18 06:24:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:24:34,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:24:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:24:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:34,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:24:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280097185] [2022-01-18 06:24:34,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280097185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:24:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923292695] [2022-01-18 06:24:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:24:34,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:24:34,982 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:24:34,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 06:24:35,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:24:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:24:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-18 06:24:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:24:35,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:24:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:35,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 06:24:35,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 06:24:35,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:24:35,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 06:24:35,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-01-18 06:24:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:35,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:36,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:36,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:36,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:36,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42254 treesize of output 39694