/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:46:20,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:46:20,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:46:20,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 19:46:20,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 19:46:20,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 19:46:20,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 19:46:20,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 19:46:20,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 19:46:20,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 19:46:20,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 19:46:20,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 19:46:20,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:46:20,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:46:20,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:46:20,701 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-Delay.epf [2021-08-06 19:46:20,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:46:20,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:46:20,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:46:20,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:46:20,726 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:46:20,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:46:20,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:46:20,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:46:20,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:46:20,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:46:20,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:46:20,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:46:20,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:46:20,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:46:20,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:46:20,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:46:20,730 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:46:20,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:46:20,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:46:21,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:46:21,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:46:21,008 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:46:21,009 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:46:21,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl [2021-08-06 19:46:21,009 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl' [2021-08-06 19:46:21,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:46:21,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:46:21,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:46:21,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:46:21,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:46:21,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:46:21,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:46:21,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:46:21,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:46:21,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:46:21,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:46:21,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:46:21,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:46:21,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/1) ... [2021-08-06 19:46:21,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:46:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:21,283 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) [2021-08-06 19:46:21,290 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 [2021-08-06 19:46:21,315 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:46:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:46:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:46:21,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:46:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:46:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:46:21,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:46:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:46:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:46:21,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:46:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:46:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:46:21,318 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:46:21,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:46:21,932 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 19:46:21,934 INFO L202 PluginConnector]: Adding new model poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:46:21 BoogieIcfgContainer [2021-08-06 19:46:21,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:46:21,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:46:21,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:46:21,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:46:21,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:21" (1/2) ... [2021-08-06 19:46:21,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b349ac and model type poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:46:21, skipping insertion in model container [2021-08-06 19:46:21,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:46:21" (2/2) ... [2021-08-06 19:46:21,940 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-trans.wvr.bpl [2021-08-06 19:46:21,943 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:46:21,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:46:21,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:46:21,943 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:46:21,970 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:46:21,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:46:22,002 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, mConcurrency=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 [2021-08-06 19:46:22,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:46:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 138 states have (on average 2.463768115942029) internal successors, (340), 188 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:46:22,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:22,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:22,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash 231812696, now seen corresponding path program 1 times [2021-08-06 19:46:22,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:22,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81776249] [2021-08-06 19:46:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:22,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:22,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 168, result has 36.4 percent of original size [2021-08-06 19:46:22,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 168, result has 36.4 percent of original size [2021-08-06 19:46:22,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 60.4 percent of original size [2021-08-06 19:46:22,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 60.4 percent of original size [2021-08-06 19:46:22,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:46:22,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:46:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:22,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:22,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81776249] [2021-08-06 19:46:22,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81776249] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:22,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:22,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:22,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742003639] [2021-08-06 19:46:22,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:22,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:22,758 INFO L87 Difference]: Start difference. First operand has 189 states, 138 states have (on average 2.463768115942029) internal successors, (340), 188 states have internal predecessors, (340), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,040 INFO L93 Difference]: Finished difference Result 355 states and 575 transitions. [2021-08-06 19:46:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:46:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,048 INFO L225 Difference]: With dead ends: 355 [2021-08-06 19:46:23,048 INFO L226 Difference]: Without dead ends: 49 [2021-08-06 19:46:23,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-06 19:46:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 25. [2021-08-06 19:46:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 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) [2021-08-06 19:46:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 39 transitions. [2021-08-06 19:46:23,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 39 transitions. Word has length 14 [2021-08-06 19:46:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,071 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 39 transitions. [2021-08-06 19:46:23,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 39 transitions. [2021-08-06 19:46:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:46:23,073 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash 990471641, now seen corresponding path program 1 times [2021-08-06 19:46:23,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319336761] [2021-08-06 19:46:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319336761] [2021-08-06 19:46:23,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319336761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809129699] [2021-08-06 19:46:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,113 INFO L87 Difference]: Start difference. First operand 25 states and 39 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,117 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2021-08-06 19:46:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,118 INFO L225 Difference]: With dead ends: 26 [2021-08-06 19:46:23,118 INFO L226 Difference]: Without dead ends: 26 [2021-08-06 19:46:23,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-06 19:46:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-06 19:46:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 25 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) [2021-08-06 19:46:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2021-08-06 19:46:23,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 15 [2021-08-06 19:46:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,124 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2021-08-06 19:46:23,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2021-08-06 19:46:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:46:23,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1820618938, now seen corresponding path program 1 times [2021-08-06 19:46:23,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999890946] [2021-08-06 19:46:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999890946] [2021-08-06 19:46:23,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999890946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266708113] [2021-08-06 19:46:23,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,170 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,173 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-08-06 19:46:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,174 INFO L225 Difference]: With dead ends: 27 [2021-08-06 19:46:23,174 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:46:23,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:46:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-06 19:46:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-08-06 19:46:23,176 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 15 [2021-08-06 19:46:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,176 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-08-06 19:46:23,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-08-06 19:46:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:46:23,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash 646798267, now seen corresponding path program 1 times [2021-08-06 19:46:23,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282021351] [2021-08-06 19:46:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282021351] [2021-08-06 19:46:23,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282021351] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187986578] [2021-08-06 19:46:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,217 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,222 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2021-08-06 19:46:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,223 INFO L225 Difference]: With dead ends: 28 [2021-08-06 19:46:23,223 INFO L226 Difference]: Without dead ends: 28 [2021-08-06 19:46:23,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-06 19:46:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-06 19:46:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2021-08-06 19:46:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2021-08-06 19:46:23,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 15 [2021-08-06 19:46:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,225 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-08-06 19:46:23,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2021-08-06 19:46:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:46:23,226 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash -677111331, now seen corresponding path program 1 times [2021-08-06 19:46:23,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286203773] [2021-08-06 19:46:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286203773] [2021-08-06 19:46:23,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286203773] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313868020] [2021-08-06 19:46:23,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,251 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,255 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2021-08-06 19:46:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,255 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:23,255 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:46:23,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:46:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-06 19:46:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 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) [2021-08-06 19:46:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2021-08-06 19:46:23,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 15 [2021-08-06 19:46:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2021-08-06 19:46:23,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2021-08-06 19:46:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:46:23,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -50765283, now seen corresponding path program 1 times [2021-08-06 19:46:23,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702551216] [2021-08-06 19:46:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702551216] [2021-08-06 19:46:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702551216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307522156] [2021-08-06 19:46:23,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,313 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,322 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2021-08-06 19:46:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,323 INFO L225 Difference]: With dead ends: 30 [2021-08-06 19:46:23,323 INFO L226 Difference]: Without dead ends: 30 [2021-08-06 19:46:23,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-06 19:46:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-06 19:46:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 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) [2021-08-06 19:46:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2021-08-06 19:46:23,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 44 transitions. Word has length 15 [2021-08-06 19:46:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,325 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 44 transitions. [2021-08-06 19:46:23,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 44 transitions. [2021-08-06 19:46:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:46:23,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash -827914882, now seen corresponding path program 1 times [2021-08-06 19:46:23,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327914568] [2021-08-06 19:46:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327914568] [2021-08-06 19:46:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327914568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:23,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247968058] [2021-08-06 19:46:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:23,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,355 INFO L87 Difference]: Start difference. First operand 30 states and 44 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,358 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-08-06 19:46:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:46:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,358 INFO L225 Difference]: With dead ends: 31 [2021-08-06 19:46:23,359 INFO L226 Difference]: Without dead ends: 31 [2021-08-06 19:46:23,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-06 19:46:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-06 19:46:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.5) internal successors, (45), 30 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) [2021-08-06 19:46:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2021-08-06 19:46:23,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 15 [2021-08-06 19:46:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,361 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2021-08-06 19:46:23,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2021-08-06 19:46:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:23,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:46:23,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash -873656683, now seen corresponding path program 1 times [2021-08-06 19:46:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630182790] [2021-08-06 19:46:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:23,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:23,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:23,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:23,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630182790] [2021-08-06 19:46:23,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630182790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:23,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65032832] [2021-08-06 19:46:23,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:23,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:23,423 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,580 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-08-06 19:46:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:46:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,581 INFO L225 Difference]: With dead ends: 62 [2021-08-06 19:46:23,581 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 19:46:23,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 19:46:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2021-08-06 19:46:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 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) [2021-08-06 19:46:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-08-06 19:46:23,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 16 [2021-08-06 19:46:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,585 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-08-06 19:46:23,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-08-06 19:46:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:23,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 19:46:23,586 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -207829674, now seen corresponding path program 1 times [2021-08-06 19:46:23,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515187496] [2021-08-06 19:46:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 19:46:23,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 19:46:23,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 19:46:23,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 19:46:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:23,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515187496] [2021-08-06 19:46:23,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515187496] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:23,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:23,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:23,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744063975] [2021-08-06 19:46:23,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:23,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:23,742 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,970 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-08-06 19:46:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:46:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,971 INFO L225 Difference]: With dead ends: 68 [2021-08-06 19:46:23,971 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 19:46:23,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 19:46:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-08-06 19:46:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 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) [2021-08-06 19:46:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2021-08-06 19:46:23,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 16 [2021-08-06 19:46:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,977 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2021-08-06 19:46:23,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2021-08-06 19:46:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:23,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 19:46:23,978 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash 36908565, now seen corresponding path program 1 times [2021-08-06 19:46:23,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749218955] [2021-08-06 19:46:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:24,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 50.0 percent of original size [2021-08-06 19:46:24,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 50.0 percent of original size [2021-08-06 19:46:24,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 52.6 percent of original size [2021-08-06 19:46:24,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 52.6 percent of original size [2021-08-06 19:46:24,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 55.4 percent of original size [2021-08-06 19:46:24,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 55.4 percent of original size [2021-08-06 19:46:24,086 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:46:24,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:46:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:24,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:24,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749218955] [2021-08-06 19:46:24,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749218955] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:24,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:24,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:46:24,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541803735] [2021-08-06 19:46:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:46:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:46:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:46:24,099 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-06 19:46:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:24,189 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-08-06 19:46:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 [2021-08-06 19:46:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:24,190 INFO L225 Difference]: With dead ends: 72 [2021-08-06 19:46:24,190 INFO L226 Difference]: Without dead ends: 67 [2021-08-06 19:46:24,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-06 19:46:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2021-08-06 19:46:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 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) [2021-08-06 19:46:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2021-08-06 19:46:24,193 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 16 [2021-08-06 19:46:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2021-08-06 19:46:24,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-06 19:46:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2021-08-06 19:46:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:24,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:24,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:24,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 19:46:24,194 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1211014904, now seen corresponding path program 1 times [2021-08-06 19:46:24,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:24,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208844901] [2021-08-06 19:46:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:24,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:24,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 89.0 percent of original size [2021-08-06 19:46:24,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 89.0 percent of original size [2021-08-06 19:46:24,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 87.1 percent of original size [2021-08-06 19:46:24,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 87.1 percent of original size [2021-08-06 19:46:24,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 86.0 percent of original size [2021-08-06 19:46:24,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 86.0 percent of original size [2021-08-06 19:46:24,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 19:46:24,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 66.7 percent of original size [2021-08-06 19:46:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:24,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208844901] [2021-08-06 19:46:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208844901] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:24,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:24,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:46:24,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940059302] [2021-08-06 19:46:24,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:46:24,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:46:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:46:24,403 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-06 19:46:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:24,513 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2021-08-06 19:46:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 [2021-08-06 19:46:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:24,514 INFO L225 Difference]: With dead ends: 74 [2021-08-06 19:46:24,514 INFO L226 Difference]: Without dead ends: 69 [2021-08-06 19:46:24,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-06 19:46:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-08-06 19:46:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2021-08-06 19:46:24,516 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 16 [2021-08-06 19:46:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:24,517 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2021-08-06 19:46:24,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-06 19:46:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2021-08-06 19:46:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:24,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:24,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:24,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 19:46:24,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash 712715669, now seen corresponding path program 1 times [2021-08-06 19:46:24,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:24,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470423798] [2021-08-06 19:46:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:24,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:24,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 45.5 percent of original size [2021-08-06 19:46:24,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 45.5 percent of original size [2021-08-06 19:46:24,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 79.6 percent of original size [2021-08-06 19:46:24,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 79.6 percent of original size [2021-08-06 19:46:24,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 85.3 percent of original size [2021-08-06 19:46:24,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 85.3 percent of original size [2021-08-06 19:46:24,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:46:24,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:46:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:24,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:24,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470423798] [2021-08-06 19:46:24,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470423798] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:24,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:24,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:24,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550710631] [2021-08-06 19:46:24,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:24,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:24,628 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:24,714 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-08-06 19:46:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:46:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:24,716 INFO L225 Difference]: With dead ends: 70 [2021-08-06 19:46:24,716 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 19:46:24,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 19:46:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2021-08-06 19:46:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2021-08-06 19:46:24,719 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 16 [2021-08-06 19:46:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:24,719 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2021-08-06 19:46:24,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2021-08-06 19:46:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:24,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:24,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:24,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 19:46:24,720 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash -129078058, now seen corresponding path program 1 times [2021-08-06 19:46:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:24,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186036511] [2021-08-06 19:46:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:24,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:24,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 94.4 percent of original size [2021-08-06 19:46:24,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 94.4 percent of original size [2021-08-06 19:46:24,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 86.3 percent of original size [2021-08-06 19:46:24,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 86.3 percent of original size [2021-08-06 19:46:24,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:46:24,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:46:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:24,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:24,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186036511] [2021-08-06 19:46:24,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186036511] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:24,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:24,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:24,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689855486] [2021-08-06 19:46:24,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:24,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:24,860 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:24,996 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-08-06 19:46:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:46:24,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:46:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:24,997 INFO L225 Difference]: With dead ends: 70 [2021-08-06 19:46:24,997 INFO L226 Difference]: Without dead ends: 61 [2021-08-06 19:46:24,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-06 19:46:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2021-08-06 19:46:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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) [2021-08-06 19:46:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-08-06 19:46:25,000 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 16 [2021-08-06 19:46:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,000 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-08-06 19:46:25,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-08-06 19:46:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 19:46:25,001 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1462242542, now seen corresponding path program 1 times [2021-08-06 19:46:25,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004280799] [2021-08-06 19:46:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 62.5 percent of original size [2021-08-06 19:46:25,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 62.5 percent of original size [2021-08-06 19:46:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004280799] [2021-08-06 19:46:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004280799] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:25,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363947610] [2021-08-06 19:46:25,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:25,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:25,060 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,107 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2021-08-06 19:46:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-08-06 19:46:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,108 INFO L225 Difference]: With dead ends: 70 [2021-08-06 19:46:25,108 INFO L226 Difference]: Without dead ends: 70 [2021-08-06 19:46:25,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-06 19:46:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2021-08-06 19:46:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-08-06 19:46:25,110 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 18 [2021-08-06 19:46:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,111 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-08-06 19:46:25,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-08-06 19:46:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 19:46:25,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,112 INFO L82 PathProgramCache]: Analyzing trace with hash -786435438, now seen corresponding path program 1 times [2021-08-06 19:46:25,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516924716] [2021-08-06 19:46:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:25,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:25,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516924716] [2021-08-06 19:46:25,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516924716] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939632737] [2021-08-06 19:46:25,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:25,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:25,155 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,210 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-08-06 19:46:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-08-06 19:46:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,211 INFO L225 Difference]: With dead ends: 61 [2021-08-06 19:46:25,211 INFO L226 Difference]: Without dead ends: 52 [2021-08-06 19:46:25,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-06 19:46:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-08-06 19:46:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 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) [2021-08-06 19:46:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-08-06 19:46:25,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2021-08-06 19:46:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,213 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-08-06 19:46:25,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-08-06 19:46:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 19:46:25,214 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash -378507658, now seen corresponding path program 1 times [2021-08-06 19:46:25,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632075602] [2021-08-06 19:46:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632075602] [2021-08-06 19:46:25,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632075602] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:25,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252251260] [2021-08-06 19:46:25,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:25,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:25,285 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,366 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-08-06 19:46:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:46:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-08-06 19:46:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,367 INFO L225 Difference]: With dead ends: 60 [2021-08-06 19:46:25,367 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 19:46:25,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 19:46:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2021-08-06 19:46:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-08-06 19:46:25,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-08-06 19:46:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,373 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-08-06 19:46:25,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-08-06 19:46:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,375 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 19:46:25,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1718600620, now seen corresponding path program 1 times [2021-08-06 19:46:25,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37402192] [2021-08-06 19:46:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:25,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:25,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37402192] [2021-08-06 19:46:25,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37402192] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:46:25,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300430234] [2021-08-06 19:46:25,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:46:25,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:46:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:25,449 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,512 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-08-06 19:46:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:46:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-08-06 19:46:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,513 INFO L225 Difference]: With dead ends: 62 [2021-08-06 19:46:25,513 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 19:46:25,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 19:46:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-08-06 19:46:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 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) [2021-08-06 19:46:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-08-06 19:46:25,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 18 [2021-08-06 19:46:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,515 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-08-06 19:46:25,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-08-06 19:46:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-08-06 19:46:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 19:46:25,516 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1906560494, now seen corresponding path program 1 times [2021-08-06 19:46:25,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18238241] [2021-08-06 19:46:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:46:25,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:46:25,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:25,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:25,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:25,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:25,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18238241] [2021-08-06 19:46:25,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18238241] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:46:25,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380069982] [2021-08-06 19:46:25,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:46:25,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:46:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:46:25,588 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-06 19:46:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,614 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-08-06 19:46:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:46:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2021-08-06 19:46:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,615 INFO L225 Difference]: With dead ends: 57 [2021-08-06 19:46:25,615 INFO L226 Difference]: Without dead ends: 46 [2021-08-06 19:46:25,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:46:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-06 19:46:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-08-06 19:46:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 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) [2021-08-06 19:46:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-08-06 19:46:25,618 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 18 [2021-08-06 19:46:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,618 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-08-06 19:46:25,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-06 19:46:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-08-06 19:46:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 19:46:25,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1128199733, now seen corresponding path program 1 times [2021-08-06 19:46:25,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695336432] [2021-08-06 19:46:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695336432] [2021-08-06 19:46:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695336432] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:25,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804631611] [2021-08-06 19:46:25,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:25,639 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,644 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-08-06 19:46:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:46:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,644 INFO L225 Difference]: With dead ends: 44 [2021-08-06 19:46:25,644 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 19:46:25,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 19:46:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-08-06 19:46:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-08-06 19:46:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-08-06 19:46:25,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2021-08-06 19:46:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,645 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-08-06 19:46:25,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-08-06 19:46:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:25,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 19:46:25,646 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash 286406006, now seen corresponding path program 1 times [2021-08-06 19:46:25,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746587731] [2021-08-06 19:46:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.7 percent of original size [2021-08-06 19:46:25,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.7 percent of original size [2021-08-06 19:46:25,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:25,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:25,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:25,709 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:25,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,720 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:25,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746587731] [2021-08-06 19:46:25,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746587731] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:25,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:25,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:46:25,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673454721] [2021-08-06 19:46:25,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:46:25,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:46:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:46:25,728 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-06 19:46:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:25,822 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-08-06 19:46:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:46:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2021-08-06 19:46:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:25,823 INFO L225 Difference]: With dead ends: 51 [2021-08-06 19:46:25,823 INFO L226 Difference]: Without dead ends: 38 [2021-08-06 19:46:25,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-06 19:46:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-08-06 19:46:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-08-06 19:46:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-08-06 19:46:25,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 18 [2021-08-06 19:46:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:25,830 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-08-06 19:46:25,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-06 19:46:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-08-06 19:46:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:46:25,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-06 19:46:25,830 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash 518237135, now seen corresponding path program 1 times [2021-08-06 19:46:25,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872404919] [2021-08-06 19:46:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:25,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:25,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:46:25,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:46:25,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:46:25,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:46:25,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:46:25,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:46:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:25,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872404919] [2021-08-06 19:46:25,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872404919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:25,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041693657] [2021-08-06 19:46:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:25,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:25,988 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) [2021-08-06 19:46:26,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:46:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:26,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:46:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:26,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 55.2 percent of original size [2021-08-06 19:46:26,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 55.2 percent of original size [2021-08-06 19:46:26,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 84.3 percent of original size [2021-08-06 19:46:26,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 84.3 percent of original size [2021-08-06 19:46:26,309 INFO L388 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 25 [2021-08-06 19:46:26,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 54.5 percent of original size [2021-08-06 19:46:26,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 54.5 percent of original size [2021-08-06 19:46:26,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:46:26,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:46:26,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:46:26,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:46:26,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 89.3 percent of original size [2021-08-06 19:46:26,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 89.3 percent of original size [2021-08-06 19:46:26,702 INFO L388 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 230 treesize of output 190 [2021-08-06 19:46:26,711 INFO L388 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 190 treesize of output 166 [2021-08-06 19:46:26,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:46:26,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:46:26,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:26,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:26,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041693657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:26,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:26,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:46:26,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689524684] [2021-08-06 19:46:26,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:46:26,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:46:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:46:26,962 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-08-06 19:46:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:27,586 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-08-06 19:46:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:46:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 20 [2021-08-06 19:46:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:27,587 INFO L225 Difference]: With dead ends: 69 [2021-08-06 19:46:27,587 INFO L226 Difference]: Without dead ends: 49 [2021-08-06 19:46:27,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 653.6ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:46:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-06 19:46:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-08-06 19:46:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-08-06 19:46:27,589 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 20 [2021-08-06 19:46:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:27,589 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-08-06 19:46:27,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-08-06 19:46:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-08-06 19:46:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:46:27,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:27,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:27,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-06 19:46:27,807 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1763581300, now seen corresponding path program 1 times [2021-08-06 19:46:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:27,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129814728] [2021-08-06 19:46:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:27,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:27,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:27,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:27,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:27,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:27,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:27,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129814728] [2021-08-06 19:46:27,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129814728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:27,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184948723] [2021-08-06 19:46:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:27,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:27,936 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) [2021-08-06 19:46:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:46:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:46:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:28,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 177, result has 62.8 percent of original size [2021-08-06 19:46:28,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 177, result has 62.8 percent of original size [2021-08-06 19:46:28,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 90.0 percent of original size [2021-08-06 19:46:28,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 90.0 percent of original size [2021-08-06 19:46:28,281 INFO L388 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 259 treesize of output 227 [2021-08-06 19:46:28,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 19:46:28,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 19:46:28,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 516, result has 44.7 percent of original size [2021-08-06 19:46:28,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 516, result has 44.7 percent of original size [2021-08-06 19:46:28,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 92.6 percent of original size [2021-08-06 19:46:28,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 92.6 percent of original size [2021-08-06 19:46:28,888 INFO L388 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 362 treesize of output 322 [2021-08-06 19:46:28,894 INFO L388 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 322 treesize of output 278 [2021-08-06 19:46:29,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 19:46:29,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 52.8 percent of original size [2021-08-06 19:46:29,174 INFO L388 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 29 [2021-08-06 19:46:29,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 4.2 percent of original size [2021-08-06 19:46:29,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 4.2 percent of original size [2021-08-06 19:46:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184948723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:29,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 19:46:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795599853] [2021-08-06 19:46:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:46:29,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:46:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:46:29,370 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:30,131 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-08-06 19:46:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:46:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-08-06 19:46:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:30,132 INFO L225 Difference]: With dead ends: 45 [2021-08-06 19:46:30,132 INFO L226 Difference]: Without dead ends: 30 [2021-08-06 19:46:30,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:46:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-06 19:46:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-06 19:46:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-08-06 19:46:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-06 19:46:30,133 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2021-08-06 19:46:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:30,133 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-06 19:46:30,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-06 19:46:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:46:30,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:30,134 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:30,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 19:46:30,352 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,SelfDestructingSolverStorable21 [2021-08-06 19:46:30,352 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1831331693, now seen corresponding path program 2 times [2021-08-06 19:46:30,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:30,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886042537] [2021-08-06 19:46:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:30,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:30,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 67.6 percent of original size [2021-08-06 19:46:30,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 67.6 percent of original size [2021-08-06 19:46:30,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 65.7 percent of original size [2021-08-06 19:46:30,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 65.7 percent of original size [2021-08-06 19:46:30,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:46:30,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:46:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:30,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:30,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886042537] [2021-08-06 19:46:30,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886042537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:30,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390537758] [2021-08-06 19:46:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:30,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:30,582 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) [2021-08-06 19:46:30,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:46:30,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:30,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:30,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:46:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:30,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:30,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:30,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:30,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:30,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 62.8 percent of original size [2021-08-06 19:46:30,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 62.8 percent of original size [2021-08-06 19:46:30,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 76.2 percent of original size [2021-08-06 19:46:30,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 76.2 percent of original size [2021-08-06 19:46:30,976 INFO L388 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 128 treesize of output 112 [2021-08-06 19:46:30,978 INFO L388 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 112 treesize of output 92 [2021-08-06 19:46:31,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:31,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:31,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:31,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:31,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390537758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:31,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:31,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-06 19:46:31,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772743730] [2021-08-06 19:46:31,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:46:31,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:46:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:31,073 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2021-08-06 19:46:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:31,478 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-08-06 19:46:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:46:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 21 [2021-08-06 19:46:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:31,478 INFO L225 Difference]: With dead ends: 63 [2021-08-06 19:46:31,478 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 19:46:31,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:46:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 19:46:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2021-08-06 19:46:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-06 19:46:31,479 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2021-08-06 19:46:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:31,480 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-06 19:46:31,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2021-08-06 19:46:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-06 19:46:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:46:31,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:31,480 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:31,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:31,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:31,696 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1349731807, now seen corresponding path program 3 times [2021-08-06 19:46:31,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:31,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283799380] [2021-08-06 19:46:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:31,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:31,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 19:46:31,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 19:46:31,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 19:46:31,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 76.0 percent of original size [2021-08-06 19:46:31,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:46:31,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:46:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:46:31,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:31,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283799380] [2021-08-06 19:46:31,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283799380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:31,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969505922] [2021-08-06 19:46:31,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:31,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:31,805 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) [2021-08-06 19:46:31,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:46:31,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:46:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:46:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:32,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:32,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:32,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:32,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:32,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:32,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:32,170 INFO L388 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 56 treesize of output 48 [2021-08-06 19:46:32,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 19:46:32,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 19:46:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:32,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969505922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:32,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:32,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-06 19:46:32,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704001775] [2021-08-06 19:46:32,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:46:32,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:46:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:32,350 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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) [2021-08-06 19:46:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:32,610 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-08-06 19:46:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:46:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 22 [2021-08-06 19:46:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:32,611 INFO L225 Difference]: With dead ends: 45 [2021-08-06 19:46:32,611 INFO L226 Difference]: Without dead ends: 41 [2021-08-06 19:46:32,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:46:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-06 19:46:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-08-06 19:46:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-06 19:46:32,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2021-08-06 19:46:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:32,612 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-06 19:46:32,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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) [2021-08-06 19:46:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-06 19:46:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:46:32,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:32,613 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:32,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:32,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:32,813 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1734570007, now seen corresponding path program 4 times [2021-08-06 19:46:32,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:32,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44140861] [2021-08-06 19:46:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:32,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:32,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:32,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 66.7 percent of original size [2021-08-06 19:46:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:32,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:32,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44140861] [2021-08-06 19:46:32,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44140861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:32,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737305007] [2021-08-06 19:46:32,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:32,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:32,949 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) [2021-08-06 19:46:32,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:46:33,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:46:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:33,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.7 percent of original size [2021-08-06 19:46:33,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.7 percent of original size [2021-08-06 19:46:33,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 50.0 percent of original size [2021-08-06 19:46:33,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 50.0 percent of original size [2021-08-06 19:46:33,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.4 percent of original size [2021-08-06 19:46:33,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.4 percent of original size [2021-08-06 19:46:33,347 INFO L388 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 53 treesize of output 45 [2021-08-06 19:46:33,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:46:33,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:46:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:33,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737305007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:33,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:33,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 19:46:33,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615362196] [2021-08-06 19:46:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:33,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:33,538 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-08-06 19:46:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:33,789 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-08-06 19:46:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:46:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 22 [2021-08-06 19:46:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:33,789 INFO L225 Difference]: With dead ends: 33 [2021-08-06 19:46:33,789 INFO L226 Difference]: Without dead ends: 24 [2021-08-06 19:46:33,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:46:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-06 19:46:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-06 19:46:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-08-06 19:46:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-06 19:46:33,791 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-08-06 19:46:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:33,791 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-06 19:46:33,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-08-06 19:46:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-06 19:46:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:33,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:33,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:33,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:34,009 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,SelfDestructingSolverStorable24 [2021-08-06 19:46:34,009 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1343243301, now seen corresponding path program 5 times [2021-08-06 19:46:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:34,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239450035] [2021-08-06 19:46:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:34,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:34,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 25.9 percent of original size [2021-08-06 19:46:34,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 25.9 percent of original size [2021-08-06 19:46:34,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 19:46:34,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.2 percent of original size [2021-08-06 19:46:34,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:34,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:34,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:46:34,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:46:34,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 74.2 percent of original size [2021-08-06 19:46:34,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 74.2 percent of original size [2021-08-06 19:46:34,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 52.8 percent of original size [2021-08-06 19:46:34,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 52.8 percent of original size [2021-08-06 19:46:34,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:34,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:34,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 19:46:34,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 19:46:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:34,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:34,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239450035] [2021-08-06 19:46:34,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239450035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:34,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553680601] [2021-08-06 19:46:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:46:34,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:34,313 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) [2021-08-06 19:46:34,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:46:34,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:46:34,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:34,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 62.0 percent of original size [2021-08-06 19:46:34,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 62.0 percent of original size [2021-08-06 19:46:34,714 INFO L388 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 227 treesize of output 195 [2021-08-06 19:46:34,975 INFO L388 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 74 treesize of output 72 [2021-08-06 19:46:35,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 407, result has 34.1 percent of original size [2021-08-06 19:46:35,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 407, result has 34.1 percent of original size [2021-08-06 19:46:35,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 87.5 percent of original size [2021-08-06 19:46:35,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 87.5 percent of original size [2021-08-06 19:46:35,375 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:35,375 INFO L388 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 170 treesize of output 149 [2021-08-06 19:46:35,381 INFO L388 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 140 treesize of output 120 [2021-08-06 19:46:35,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:35,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:35,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:35,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:46:35,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553680601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:35,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:35,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-06 19:46:35,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10901839] [2021-08-06 19:46:35,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:46:35,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:46:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:46:35,592 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2021-08-06 19:46:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:36,438 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-08-06 19:46:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:46:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 23 [2021-08-06 19:46:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:36,439 INFO L225 Difference]: With dead ends: 59 [2021-08-06 19:46:36,439 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 19:46:36,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:46:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 19:46:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-08-06 19:46:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-08-06 19:46:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-06 19:46:36,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2021-08-06 19:46:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:36,440 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-06 19:46:36,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2021-08-06 19:46:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-06 19:46:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:46:36,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:36,441 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:36,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:36,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:46:36,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2028791959, now seen corresponding path program 6 times [2021-08-06 19:46:36,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:36,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907731419] [2021-08-06 19:46:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:36,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:36,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 47.8 percent of original size [2021-08-06 19:46:36,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 47.8 percent of original size [2021-08-06 19:46:36,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:46:36,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:46:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:36,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:36,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907731419] [2021-08-06 19:46:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907731419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:36,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223209564] [2021-08-06 19:46:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:46:36,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:36,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:36,793 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) [2021-08-06 19:46:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:46:37,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:46:37,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 19:46:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:37,118 INFO L388 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 65 treesize of output 57 [2021-08-06 19:46:37,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:37,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:37,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 937, result has 18.9 percent of original size [2021-08-06 19:46:37,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 937, result has 18.9 percent of original size [2021-08-06 19:46:37,390 INFO L388 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 216 treesize of output 188 [2021-08-06 19:46:37,393 INFO L388 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 188 treesize of output 160 [2021-08-06 19:46:37,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:37,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:37,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:37,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:46:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223209564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:37,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:37,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-08-06 19:46:37,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980264026] [2021-08-06 19:46:37,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:46:37,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:46:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:46:37,511 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-08-06 19:46:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:37,658 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-06 19:46:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:46:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 24 [2021-08-06 19:46:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:37,658 INFO L225 Difference]: With dead ends: 49 [2021-08-06 19:46:37,658 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 19:46:37,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:46:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 19:46:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-08-06 19:46:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2021-08-06 19:46:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-08-06 19:46:37,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2021-08-06 19:46:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:37,664 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-08-06 19:46:37,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-08-06 19:46:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-08-06 19:46:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:46:37,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:37,665 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:37,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:37,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:37,882 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1073874271, now seen corresponding path program 7 times [2021-08-06 19:46:37,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:37,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827573318] [2021-08-06 19:46:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:37,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:37,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 19:46:37,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.6 percent of original size [2021-08-06 19:46:37,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 60.6 percent of original size [2021-08-06 19:46:37,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 60.6 percent of original size [2021-08-06 19:46:37,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 67.5 percent of original size [2021-08-06 19:46:37,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 67.5 percent of original size [2021-08-06 19:46:37,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 19:46:38,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 19:46:38,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 19:46:38,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 19:46:38,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:46:38,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:46:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:46:38,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827573318] [2021-08-06 19:46:38,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827573318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891837782] [2021-08-06 19:46:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:38,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:38,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:38,050 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) [2021-08-06 19:46:38,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:46:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 19:46:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:38,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 55.6 percent of original size [2021-08-06 19:46:38,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 55.6 percent of original size [2021-08-06 19:46:38,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 84.9 percent of original size [2021-08-06 19:46:38,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 84.9 percent of original size [2021-08-06 19:46:38,811 INFO L388 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 96 treesize of output 94 [2021-08-06 19:46:38,813 INFO L388 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 94 treesize of output 92 [2021-08-06 19:46:39,828 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:39,829 INFO L388 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 93 treesize of output 84 [2021-08-06 19:46:39,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 68.4 percent of original size [2021-08-06 19:46:39,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 68.4 percent of original size [2021-08-06 19:46:40,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.1 percent of original size [2021-08-06 19:46:40,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.1 percent of original size [2021-08-06 19:46:40,298 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:40,298 INFO L388 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 78 treesize of output 69 [2021-08-06 19:46:40,301 INFO L388 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 60 treesize of output 52 [2021-08-06 19:46:40,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 58.8 percent of original size [2021-08-06 19:46:40,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 58.8 percent of original size [2021-08-06 19:46:40,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:40,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:40,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891837782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:40,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:40,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-08-06 19:46:40,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664207107] [2021-08-06 19:46:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:46:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:46:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:46:40,394 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:41,048 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-08-06 19:46:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:46:41,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 19:46:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:41,049 INFO L225 Difference]: With dead ends: 48 [2021-08-06 19:46:41,049 INFO L226 Difference]: Without dead ends: 26 [2021-08-06 19:46:41,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:46:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-06 19:46:41,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-06 19:46:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-06 19:46:41,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2021-08-06 19:46:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:41,050 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-06 19:46:41,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-06 19:46:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:46:41,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:41,051 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:41,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:41,251 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,SelfDestructingSolverStorable27 [2021-08-06 19:46:41,251 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash 754480731, now seen corresponding path program 8 times [2021-08-06 19:46:41,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:41,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198877810] [2021-08-06 19:46:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:41,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:41,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:46:41,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:46:41,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:41,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:41,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:41,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:41,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:46:41,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:46:41,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:41,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:41,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:41,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:41,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:41,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198877810] [2021-08-06 19:46:41,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198877810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:41,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470119952] [2021-08-06 19:46:41,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:41,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:41,479 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) [2021-08-06 19:46:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:46:41,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:46:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:42,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:46:42,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:46:42,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:46:42,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:46:42,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:42,464 INFO L388 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 84 treesize of output 75 [2021-08-06 19:46:42,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:46:42,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:46:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:42,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470119952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:42,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:42,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 19:46:42,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594964801] [2021-08-06 19:46:42,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:46:42,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:46:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:46:42,822 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-08-06 19:46:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:44,176 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-08-06 19:46:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:46:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 25 [2021-08-06 19:46:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:44,177 INFO L225 Difference]: With dead ends: 63 [2021-08-06 19:46:44,177 INFO L226 Difference]: Without dead ends: 48 [2021-08-06 19:46:44,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1467.9ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 19:46:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-06 19:46:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-08-06 19:46:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-08-06 19:46:44,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2021-08-06 19:46:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-08-06 19:46:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-08-06 19:46:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-08-06 19:46:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:46:44,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:44,179 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:44,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:44,380 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,SelfDestructingSolverStorable28 [2021-08-06 19:46:44,380 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:44,380 INFO L82 PathProgramCache]: Analyzing trace with hash 354724371, now seen corresponding path program 9 times [2021-08-06 19:46:44,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:44,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580644298] [2021-08-06 19:46:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:44,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:44,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 86.8 percent of original size [2021-08-06 19:46:44,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 86.8 percent of original size [2021-08-06 19:46:44,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,633 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 19:46:44,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 88.1 percent of original size [2021-08-06 19:46:44,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 88.1 percent of original size [2021-08-06 19:46:44,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:46:44,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:46:44,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:44,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:44,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:44,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580644298] [2021-08-06 19:46:44,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580644298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:44,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146072652] [2021-08-06 19:46:44,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:44,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:44,776 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) [2021-08-06 19:46:44,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:46:45,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:46:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:46:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:45,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:45,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:45,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1855, result has 15.1 percent of original size [2021-08-06 19:46:45,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1855, result has 15.1 percent of original size [2021-08-06 19:46:45,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 55.0 percent of original size [2021-08-06 19:46:45,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 55.0 percent of original size [2021-08-06 19:46:45,621 INFO L388 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 139 treesize of output 119 [2021-08-06 19:46:45,624 INFO L388 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 119 treesize of output 99 [2021-08-06 19:46:45,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:45,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:45,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:45,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:46:45,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146072652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:45,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:45,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-08-06 19:46:45,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920761671] [2021-08-06 19:46:45,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:46:45,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:46:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:46:45,740 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:46,791 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-08-06 19:46:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:46:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 19:46:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:46,792 INFO L225 Difference]: With dead ends: 74 [2021-08-06 19:46:46,792 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 19:46:46,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1205.5ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:46:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 19:46:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 28. [2021-08-06 19:46:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-06 19:46:46,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2021-08-06 19:46:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:46,794 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-06 19:46:46,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-06 19:46:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:46:46,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:46,795 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:46,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:47,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:47,017 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1629981277, now seen corresponding path program 10 times [2021-08-06 19:46:47,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:47,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612655736] [2021-08-06 19:46:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:47,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:47,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 68.4 percent of original size [2021-08-06 19:46:47,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 68.4 percent of original size [2021-08-06 19:46:47,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:47,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:46:47,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:47,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612655736] [2021-08-06 19:46:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612655736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:47,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029169468] [2021-08-06 19:46:47,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:47,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:47,164 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) [2021-08-06 19:46:47,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:46:47,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:47,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:46:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:47,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 889, result has 26.6 percent of original size [2021-08-06 19:46:47,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 889, result has 26.6 percent of original size [2021-08-06 19:46:47,823 INFO L388 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 319 treesize of output 287 [2021-08-06 19:46:48,039 INFO L388 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 74 treesize of output 72 [2021-08-06 19:46:48,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 398, result has 39.9 percent of original size [2021-08-06 19:46:48,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 398, result has 39.9 percent of original size [2021-08-06 19:46:48,469 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:48,470 INFO L388 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 223 treesize of output 206 [2021-08-06 19:46:48,476 INFO L388 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 197 treesize of output 161 [2021-08-06 19:46:48,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:48,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:48,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:48,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:46:48,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029169468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:48,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:48,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-08-06 19:46:48,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451689975] [2021-08-06 19:46:48,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:46:48,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:46:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:46:48,652 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:49,011 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-08-06 19:46:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:46:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 19:46:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:49,011 INFO L225 Difference]: With dead ends: 62 [2021-08-06 19:46:49,011 INFO L226 Difference]: Without dead ends: 50 [2021-08-06 19:46:49,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:46:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-06 19:46:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-08-06 19:46:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-06 19:46:49,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2021-08-06 19:46:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:49,013 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-06 19:46:49,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-06 19:46:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:46:49,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:49,014 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:49,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 19:46:49,232 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,SelfDestructingSolverStorable30 [2021-08-06 19:46:49,233 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash 397993055, now seen corresponding path program 11 times [2021-08-06 19:46:49,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:49,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653996359] [2021-08-06 19:46:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:49,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:49,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:46:49,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:46:49,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:46:49,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:46:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:49,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:49,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653996359] [2021-08-06 19:46:49,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653996359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:49,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613745311] [2021-08-06 19:46:49,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:46:49,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:49,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:49,452 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) [2021-08-06 19:46:49,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:46:49,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:46:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 19:46:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:50,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2059, result has 11.9 percent of original size [2021-08-06 19:46:50,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2059, result has 11.9 percent of original size [2021-08-06 19:46:50,197 INFO L388 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 277 treesize of output 233 [2021-08-06 19:46:50,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 19:46:50,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 19:46:50,353 INFO L388 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 49 treesize of output 47 [2021-08-06 19:46:50,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 418, result has 41.5 percent of original size [2021-08-06 19:46:50,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 418, result has 41.5 percent of original size [2021-08-06 19:46:51,056 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:51,057 INFO L388 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 253 treesize of output 224 [2021-08-06 19:46:51,063 INFO L388 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 215 treesize of output 179 [2021-08-06 19:46:51,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:46:51,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:46:51,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:51,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:46:51,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613745311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:51,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:51,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-08-06 19:46:51,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128663857] [2021-08-06 19:46:51,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:46:51,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:46:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:46:51,261 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 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) [2021-08-06 19:46:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:52,274 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2021-08-06 19:46:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:46:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 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 28 [2021-08-06 19:46:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:52,276 INFO L225 Difference]: With dead ends: 91 [2021-08-06 19:46:52,276 INFO L226 Difference]: Without dead ends: 74 [2021-08-06 19:46:52,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=320, Invalid=2332, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:46:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-06 19:46:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2021-08-06 19:46:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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) [2021-08-06 19:46:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-08-06 19:46:52,278 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2021-08-06 19:46:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:52,278 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-08-06 19:46:52,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 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) [2021-08-06 19:46:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-08-06 19:46:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:46:52,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:52,278 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:52,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 19:46:52,478 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,SelfDestructingSolverStorable31 [2021-08-06 19:46:52,479 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1986448745, now seen corresponding path program 12 times [2021-08-06 19:46:52,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:52,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023751804] [2021-08-06 19:46:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:52,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:52,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:52,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:46:52,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:46:52,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:46:52,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:46:52,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:46:52,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:52,665 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:46:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:46:52,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:52,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023751804] [2021-08-06 19:46:52,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023751804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:52,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688186425] [2021-08-06 19:46:52,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:46:52,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:52,678 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) [2021-08-06 19:46:52,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:46:53,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:46:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:46:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:53,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:53,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:53,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:53,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:53,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.8 percent of original size [2021-08-06 19:46:53,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.8 percent of original size [2021-08-06 19:46:53,753 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:53,753 INFO L388 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 59 treesize of output 54 [2021-08-06 19:46:53,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 92.1 percent of original size [2021-08-06 19:46:53,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 92.1 percent of original size [2021-08-06 19:46:54,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 19:46:54,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 19:46:54,103 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:54,103 INFO L388 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 31 treesize of output 26 [2021-08-06 19:46:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:54,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688186425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:54,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:54,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2021-08-06 19:46:54,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645019487] [2021-08-06 19:46:54,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:46:54,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:46:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:46:54,148 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-08-06 19:46:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:54,821 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-08-06 19:46:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:46:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 28 [2021-08-06 19:46:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:54,821 INFO L225 Difference]: With dead ends: 54 [2021-08-06 19:46:54,821 INFO L226 Difference]: Without dead ends: 41 [2021-08-06 19:46:54,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:46:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-06 19:46:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-06 19:46:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 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) [2021-08-06 19:46:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-06 19:46:54,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2021-08-06 19:46:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:54,823 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-06 19:46:54,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-08-06 19:46:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-06 19:46:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:46:54,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:54,823 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:54,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:55,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 19:46:55,043 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash -280605929, now seen corresponding path program 13 times [2021-08-06 19:46:55,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:55,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491138655] [2021-08-06 19:46:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:55,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:46:55,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:55,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491138655] [2021-08-06 19:46:55,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491138655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:55,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664043451] [2021-08-06 19:46:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:55,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:55,209 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) [2021-08-06 19:46:55,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:46:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 19:46:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:55,846 INFO L388 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 65 treesize of output 57 [2021-08-06 19:46:55,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:46:55,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:46:55,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:55,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:46:56,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 945, result has 23.9 percent of original size [2021-08-06 19:46:56,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 945, result has 23.9 percent of original size [2021-08-06 19:46:56,281 INFO L388 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 155 treesize of output 131 [2021-08-06 19:46:56,283 INFO L388 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 131 treesize of output 111 [2021-08-06 19:46:56,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:56,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:46:56,383 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:56,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:46:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664043451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:56,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-06 19:46:56,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228338550] [2021-08-06 19:46:56,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:46:56,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:46:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:46:56,388 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 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) [2021-08-06 19:46:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:56,640 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-08-06 19:46:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:46:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 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 30 [2021-08-06 19:46:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:56,640 INFO L225 Difference]: With dead ends: 59 [2021-08-06 19:46:56,641 INFO L226 Difference]: Without dead ends: 54 [2021-08-06 19:46:56,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:46:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-06 19:46:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-08-06 19:46:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-08-06 19:46:56,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 30 [2021-08-06 19:46:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:56,642 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-06 19:46:56,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 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) [2021-08-06 19:46:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-08-06 19:46:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:46:56,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:56,642 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:56,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:56,860 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash -195748841, now seen corresponding path program 14 times [2021-08-06 19:46:56,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:56,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44625736] [2021-08-06 19:46:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:56,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:56,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:46:56,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:46:57,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:57,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:46:57,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:57,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:46:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:46:57,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:57,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44625736] [2021-08-06 19:46:57,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44625736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:57,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135233507] [2021-08-06 19:46:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:57,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:57,072 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) [2021-08-06 19:46:57,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:46:57,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 19:46:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:57,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:46:57,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:46:57,945 INFO L388 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 302 treesize of output 270 [2021-08-06 19:46:58,179 INFO L388 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 74 treesize of output 72 [2021-08-06 19:46:58,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 59.2 percent of original size [2021-08-06 19:46:58,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 59.2 percent of original size [2021-08-06 19:46:58,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 86.8 percent of original size [2021-08-06 19:46:58,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 86.8 percent of original size [2021-08-06 19:46:58,698 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:58,698 INFO L388 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 159 treesize of output 138 [2021-08-06 19:46:58,703 INFO L388 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 129 treesize of output 113 [2021-08-06 19:46:58,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:58,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:46:58,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:58,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:46:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:46:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135233507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:58,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:58,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 19:46:58,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675245545] [2021-08-06 19:46:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:46:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:46:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:46:58,927 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-08-06 19:46:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:59,390 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-08-06 19:46:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:46:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-08-06 19:46:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:59,390 INFO L225 Difference]: With dead ends: 68 [2021-08-06 19:46:59,390 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 19:46:59,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 605.2ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:46:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 19:46:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-08-06 19:46:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2021-08-06 19:46:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-08-06 19:46:59,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2021-08-06 19:46:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-08-06 19:46:59,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-08-06 19:46:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-08-06 19:46:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:46:59,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:59,392 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:59,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:59,593 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:46:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2117377061, now seen corresponding path program 15 times [2021-08-06 19:46:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010387263] [2021-08-06 19:46:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:59,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 35.5 percent of original size [2021-08-06 19:46:59,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 35.5 percent of original size [2021-08-06 19:46:59,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:59,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:46:59,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.3 percent of original size [2021-08-06 19:46:59,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 19:46:59,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 19:46:59,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:59,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:46:59,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:59,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:46:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:46:59,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:59,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010387263] [2021-08-06 19:46:59,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010387263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:59,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024226421] [2021-08-06 19:46:59,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:59,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:59,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:59,998 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) [2021-08-06 19:46:59,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:47:00,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:47:00,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:47:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:00,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 961, result has 18.0 percent of original size [2021-08-06 19:47:00,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 961, result has 18.0 percent of original size [2021-08-06 19:47:00,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 87.6 percent of original size [2021-08-06 19:47:00,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 87.6 percent of original size [2021-08-06 19:47:00,965 INFO L388 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 140 treesize of output 120 [2021-08-06 19:47:00,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:47:00,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:47:01,025 INFO L388 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 40 treesize of output 36 [2021-08-06 19:47:01,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 967, result has 23.6 percent of original size [2021-08-06 19:47:01,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 967, result has 23.6 percent of original size [2021-08-06 19:47:01,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.7 percent of original size [2021-08-06 19:47:01,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.7 percent of original size [2021-08-06 19:47:01,503 INFO L388 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 242 treesize of output 206 [2021-08-06 19:47:01,505 INFO L388 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 206 treesize of output 174 [2021-08-06 19:47:01,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:47:01,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:47:01,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:01,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:47:01,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024226421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:01,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:01,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-08-06 19:47:01,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569722482] [2021-08-06 19:47:01,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:47:01,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:47:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:47:01,786 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:02,846 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-08-06 19:47:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:47:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:47:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:02,847 INFO L225 Difference]: With dead ends: 84 [2021-08-06 19:47:02,847 INFO L226 Difference]: Without dead ends: 79 [2021-08-06 19:47:02,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1311.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:47:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-06 19:47:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 46. [2021-08-06 19:47:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2021-08-06 19:47:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-08-06 19:47:02,848 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2021-08-06 19:47:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:02,849 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-08-06 19:47:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-08-06 19:47:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:47:02,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:02,849 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:02,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:03,049 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,SelfDestructingSolverStorable35 [2021-08-06 19:47:03,050 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash -53410797, now seen corresponding path program 16 times [2021-08-06 19:47:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:03,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687168620] [2021-08-06 19:47:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:03,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:47:03,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:03,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687168620] [2021-08-06 19:47:03,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687168620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:03,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972559335] [2021-08-06 19:47:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:03,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:03,236 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) [2021-08-06 19:47:03,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:47:03,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:47:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:04,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1769, result has 15.3 percent of original size [2021-08-06 19:47:04,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1769, result has 15.3 percent of original size [2021-08-06 19:47:04,272 INFO L388 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 317 treesize of output 281 [2021-08-06 19:47:04,547 INFO L388 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 74 treesize of output 72 [2021-08-06 19:47:04,549 INFO L388 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 72 treesize of output 70 [2021-08-06 19:47:04,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:47:04,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:47:04,956 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:04,956 INFO L388 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 54 treesize of output 49 [2021-08-06 19:47:04,958 INFO L388 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 40 treesize of output 36 [2021-08-06 19:47:04,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:04,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:05,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:05,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:47:05,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972559335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:05,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:05,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-06 19:47:05,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064241979] [2021-08-06 19:47:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:47:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:47:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:47:05,079 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-08-06 19:47:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:05,518 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-06 19:47:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:47:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 31 [2021-08-06 19:47:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:05,519 INFO L225 Difference]: With dead ends: 64 [2021-08-06 19:47:05,519 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 19:47:05,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:47:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 19:47:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-06 19:47:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 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) [2021-08-06 19:47:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-08-06 19:47:05,520 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2021-08-06 19:47:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:05,520 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-08-06 19:47:05,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-08-06 19:47:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-08-06 19:47:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:47:05,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:05,520 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:05,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:05,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:47:05,721 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1558309737, now seen corresponding path program 17 times [2021-08-06 19:47:05,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:05,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097932397] [2021-08-06 19:47:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:05,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:05,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:05,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:05,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:05,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:05,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:47:05,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:47:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:47:06,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:06,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097932397] [2021-08-06 19:47:06,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097932397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:06,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894899100] [2021-08-06 19:47:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:06,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:06,064 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) [2021-08-06 19:47:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:47:06,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:47:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:47:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:06,948 INFO L388 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 65 treesize of output 57 [2021-08-06 19:47:06,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:47:06,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:47:07,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.8 percent of original size [2021-08-06 19:47:07,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.8 percent of original size [2021-08-06 19:47:07,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4013, result has 7.6 percent of original size [2021-08-06 19:47:07,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4013, result has 7.6 percent of original size [2021-08-06 19:47:07,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 84.4 percent of original size [2021-08-06 19:47:07,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 84.4 percent of original size [2021-08-06 19:47:07,824 INFO L388 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 260 treesize of output 228 [2021-08-06 19:47:07,830 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:07,830 INFO L388 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 228 treesize of output 191 [2021-08-06 19:47:07,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:47:07,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:47:07,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:47:07,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:47:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:47:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894899100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:07,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:07,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 30 [2021-08-06 19:47:07,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861665300] [2021-08-06 19:47:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:47:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:47:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:47:07,958 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:09,757 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-08-06 19:47:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 19:47:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:47:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:09,757 INFO L225 Difference]: With dead ends: 97 [2021-08-06 19:47:09,757 INFO L226 Difference]: Without dead ends: 59 [2021-08-06 19:47:09,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1801.7ms TimeCoverageRelationStatistics Valid=512, Invalid=3910, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 19:47:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-06 19:47:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2021-08-06 19:47:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2021-08-06 19:47:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-06 19:47:09,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 32 [2021-08-06 19:47:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:09,759 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-06 19:47:09,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-06 19:47:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:47:09,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:09,759 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:09,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 19:47:09,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:47:09,969 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash 781922595, now seen corresponding path program 18 times [2021-08-06 19:47:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:09,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192506769] [2021-08-06 19:47:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:09,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:10,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 26.9 percent of original size [2021-08-06 19:47:10,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 26.9 percent of original size [2021-08-06 19:47:10,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:10,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:10,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 75.0 percent of original size [2021-08-06 19:47:10,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 19:47:10,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 55.6 percent of original size [2021-08-06 19:47:10,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:47:10,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:47:10,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:47:10,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:47:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:10,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:10,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192506769] [2021-08-06 19:47:10,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192506769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:10,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011365630] [2021-08-06 19:47:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:47:10,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:10,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:10,236 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) [2021-08-06 19:47:10,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:47:11,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:47:11,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:47:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:11,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 24.1 percent of original size [2021-08-06 19:47:11,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 24.1 percent of original size [2021-08-06 19:47:11,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 89.9 percent of original size [2021-08-06 19:47:11,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 89.9 percent of original size [2021-08-06 19:47:11,384 INFO L388 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 245 treesize of output 217 [2021-08-06 19:47:11,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 19:47:11,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 19:47:11,784 INFO L388 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 48 treesize of output 44 [2021-08-06 19:47:11,786 INFO L388 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 44 treesize of output 36 [2021-08-06 19:47:11,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:11,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:11,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:11,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:47:11,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011365630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:11,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:11,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 19:47:11,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824690829] [2021-08-06 19:47:11,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:47:11,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:47:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:47:11,875 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:13,399 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-08-06 19:47:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 19:47:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:47:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:13,400 INFO L225 Difference]: With dead ends: 89 [2021-08-06 19:47:13,400 INFO L226 Difference]: Without dead ends: 61 [2021-08-06 19:47:13,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1695.9ms TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 19:47:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-06 19:47:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-08-06 19:47:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2021-08-06 19:47:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-08-06 19:47:13,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2021-08-06 19:47:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:13,402 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-08-06 19:47:13,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-08-06 19:47:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 19:47:13,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:13,402 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:13,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:13,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:13,617 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash 371397911, now seen corresponding path program 19 times [2021-08-06 19:47:13,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:13,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258716959] [2021-08-06 19:47:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:13,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:13,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 35.5 percent of original size [2021-08-06 19:47:13,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 35.5 percent of original size [2021-08-06 19:47:13,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 80.0 percent of original size [2021-08-06 19:47:13,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 80.0 percent of original size [2021-08-06 19:47:14,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 19:47:14,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 19:47:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:14,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258716959] [2021-08-06 19:47:14,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258716959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530869200] [2021-08-06 19:47:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:47:14,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:14,155 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) [2021-08-06 19:47:14,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:47:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:47:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:15,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:47:15,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:47:15,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:15,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:15,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.4 percent of original size [2021-08-06 19:47:15,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.4 percent of original size [2021-08-06 19:47:15,555 INFO L388 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 53 treesize of output 45 [2021-08-06 19:47:15,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:47:15,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:47:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:15,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530869200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:15,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:15,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2021-08-06 19:47:15,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944548884] [2021-08-06 19:47:15,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 19:47:15,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 19:47:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:47:15,948 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:16,485 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-08-06 19:47:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:47:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 19:47:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:16,485 INFO L225 Difference]: With dead ends: 53 [2021-08-06 19:47:16,485 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 19:47:16,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1007.6ms TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 19:47:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 19:47:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-06 19:47:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-08-06 19:47:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-06 19:47:16,487 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2021-08-06 19:47:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:16,487 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-06 19:47:16,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-06 19:47:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:16,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:16,488 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:16,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:16,688 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,SelfDestructingSolverStorable39 [2021-08-06 19:47:16,688 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -337126693, now seen corresponding path program 20 times [2021-08-06 19:47:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:16,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894758747] [2021-08-06 19:47:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:16,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:16,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:47:16,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:47:16,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:47:16,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:47:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:17,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894758747] [2021-08-06 19:47:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894758747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:17,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895774278] [2021-08-06 19:47:17,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:47:17,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:17,010 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) [2021-08-06 19:47:17,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:47:17,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 19:47:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:17,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2016, result has 14.3 percent of original size [2021-08-06 19:47:18,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2016, result has 14.3 percent of original size [2021-08-06 19:47:18,210 INFO L388 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 334 treesize of output 298 [2021-08-06 19:47:18,628 INFO L388 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 97 treesize of output 95 [2021-08-06 19:47:19,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 59.2 percent of original size [2021-08-06 19:47:19,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 59.2 percent of original size [2021-08-06 19:47:19,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 86.8 percent of original size [2021-08-06 19:47:19,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 86.8 percent of original size [2021-08-06 19:47:19,256 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:19,256 INFO L388 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 159 treesize of output 138 [2021-08-06 19:47:19,260 INFO L388 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 129 treesize of output 113 [2021-08-06 19:47:19,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:47:19,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:47:19,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:19,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:19,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895774278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:19,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:19,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-06 19:47:19,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096064597] [2021-08-06 19:47:19,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:47:19,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:47:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:47:19,540 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:20,265 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-08-06 19:47:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:47:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:47:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:20,266 INFO L225 Difference]: With dead ends: 77 [2021-08-06 19:47:20,266 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 19:47:20,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 936.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:47:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 19:47:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2021-08-06 19:47:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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) [2021-08-06 19:47:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-08-06 19:47:20,268 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2021-08-06 19:47:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:20,268 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-08-06 19:47:20,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-08-06 19:47:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:47:20,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:20,268 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:20,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 19:47:20,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:20,469 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash -826552937, now seen corresponding path program 21 times [2021-08-06 19:47:20,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:20,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593878613] [2021-08-06 19:47:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:20,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:47:20,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593878613] [2021-08-06 19:47:20,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593878613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689742867] [2021-08-06 19:47:20,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:47:20,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:20,781 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) [2021-08-06 19:47:20,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:47:21,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:47:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 19:47:21,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:21,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:47:21,961 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:47:22,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 25.9 percent of original size [2021-08-06 19:47:22,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 25.9 percent of original size [2021-08-06 19:47:22,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.5 percent of original size [2021-08-06 19:47:22,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.5 percent of original size [2021-08-06 19:47:22,933 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:22,933 INFO L388 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 236 treesize of output 207 [2021-08-06 19:47:23,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 47.8 percent of original size [2021-08-06 19:47:23,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 47.8 percent of original size [2021-08-06 19:47:23,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 400, result has 39.9 percent of original size [2021-08-06 19:47:23,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 400, result has 39.9 percent of original size [2021-08-06 19:47:23,686 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:23,687 INFO L388 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 67 treesize of output 54 [2021-08-06 19:47:23,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 19:47:23,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 19:47:23,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:47:23,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:47:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:23,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689742867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:23,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:23,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 37 [2021-08-06 19:47:23,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526619574] [2021-08-06 19:47:23,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 19:47:23,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 19:47:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:47:23,789 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 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) [2021-08-06 19:47:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:24,880 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-08-06 19:47:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:47:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 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 36 [2021-08-06 19:47:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:24,881 INFO L225 Difference]: With dead ends: 92 [2021-08-06 19:47:24,881 INFO L226 Difference]: Without dead ends: 82 [2021-08-06 19:47:24,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1456.3ms TimeCoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:47:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-06 19:47:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2021-08-06 19:47:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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) [2021-08-06 19:47:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-06 19:47:24,882 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 36 [2021-08-06 19:47:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:24,883 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-06 19:47:24,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 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) [2021-08-06 19:47:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-06 19:47:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:47:24,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:24,883 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:24,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:25,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:25,084 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 40608351, now seen corresponding path program 22 times [2021-08-06 19:47:25,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:25,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225493892] [2021-08-06 19:47:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:25,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:25,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:47:25,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:47:25,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 85.7 percent of original size [2021-08-06 19:47:25,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 19:47:25,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.9 percent of original size [2021-08-06 19:47:25,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:47:25,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:47:25,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:47:25,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:47:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:25,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:25,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225493892] [2021-08-06 19:47:25,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225493892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:25,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401288399] [2021-08-06 19:47:25,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:25,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:25,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:25,550 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) [2021-08-06 19:47:25,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:47:26,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 19:47:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:26,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 62.0 percent of original size [2021-08-06 19:47:26,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 62.0 percent of original size [2021-08-06 19:47:26,780 INFO L388 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 227 treesize of output 195 [2021-08-06 19:47:27,000 INFO L388 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 73 treesize of output 71 [2021-08-06 19:47:27,002 INFO L388 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 71 treesize of output 69 [2021-08-06 19:47:27,573 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:27,573 INFO L388 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 54 treesize of output 49 [2021-08-06 19:47:27,575 INFO L388 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 40 treesize of output 36 [2021-08-06 19:47:27,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:27,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:27,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:27,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401288399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:27,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:27,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-08-06 19:47:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532943976] [2021-08-06 19:47:27,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:47:27,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:47:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:47:27,719 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:29,121 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-08-06 19:47:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:47:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:47:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:29,122 INFO L225 Difference]: With dead ends: 68 [2021-08-06 19:47:29,122 INFO L226 Difference]: Without dead ends: 38 [2021-08-06 19:47:29,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1678.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1939, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:47:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-06 19:47:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-06 19:47:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2021-08-06 19:47:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-06 19:47:29,123 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 36 [2021-08-06 19:47:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:29,123 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-06 19:47:29,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-06 19:47:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 19:47:29,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:29,124 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:29,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:29,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:29,324 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1861865125, now seen corresponding path program 23 times [2021-08-06 19:47:29,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:29,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769933440] [2021-08-06 19:47:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:29,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:29,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:47:29,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:47:29,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:47:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:29,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:29,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769933440] [2021-08-06 19:47:29,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769933440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:29,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660226087] [2021-08-06 19:47:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:29,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:29,756 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) [2021-08-06 19:47:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:47:30,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:47:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:30,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:47:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:30,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 398, result has 37.3 percent of original size [2021-08-06 19:47:30,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 398, result has 37.3 percent of original size [2021-08-06 19:47:31,064 INFO L388 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 236 treesize of output 196 [2021-08-06 19:47:31,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 66.7 percent of original size [2021-08-06 19:47:31,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 66.7 percent of original size [2021-08-06 19:47:31,181 INFO L388 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 49 treesize of output 47 [2021-08-06 19:47:32,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 945, result has 24.5 percent of original size [2021-08-06 19:47:32,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 945, result has 24.5 percent of original size [2021-08-06 19:47:32,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 89.7 percent of original size [2021-08-06 19:47:32,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 89.7 percent of original size [2021-08-06 19:47:32,183 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:32,183 INFO L388 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 248 treesize of output 211 [2021-08-06 19:47:32,189 INFO L388 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 202 treesize of output 174 [2021-08-06 19:47:32,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:47:32,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:47:32,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:32,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:47:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660226087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:32,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:32,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 37 [2021-08-06 19:47:32,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878239750] [2021-08-06 19:47:32,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 19:47:32,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 19:47:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:47:32,422 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:34,131 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-08-06 19:47:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 19:47:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 19:47:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:34,131 INFO L225 Difference]: With dead ends: 91 [2021-08-06 19:47:34,131 INFO L226 Difference]: Without dead ends: 68 [2021-08-06 19:47:34,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1878.9ms TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 19:47:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-06 19:47:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-08-06 19:47:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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) [2021-08-06 19:47:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-08-06 19:47:34,134 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2021-08-06 19:47:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:34,134 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-08-06 19:47:34,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-08-06 19:47:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:47:34,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:34,134 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:34,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:34,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:34,335 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2020119277, now seen corresponding path program 24 times [2021-08-06 19:47:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:34,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345724846] [2021-08-06 19:47:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:34,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-06 19:47:34,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:34,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345724846] [2021-08-06 19:47:34,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345724846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:34,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001450508] [2021-08-06 19:47:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:47:34,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:34,749 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) [2021-08-06 19:47:34,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:47:35,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:47:35,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-06 19:47:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:36,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:36,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:36,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:47:36,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:47:37,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 401, result has 44.6 percent of original size [2021-08-06 19:47:37,214 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 401, result has 44.6 percent of original size [2021-08-06 19:47:37,327 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:37,327 INFO L388 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 278 treesize of output 253 [2021-08-06 19:47:37,493 INFO L388 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 69 treesize of output 65 [2021-08-06 19:47:38,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 60.2 percent of original size [2021-08-06 19:47:38,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 60.2 percent of original size [2021-08-06 19:47:38,403 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:38,404 INFO L388 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 168 treesize of output 143 [2021-08-06 19:47:38,409 INFO L388 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 92 treesize of output 76 [2021-08-06 19:47:38,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 51.3 percent of original size [2021-08-06 19:47:38,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 51.3 percent of original size [2021-08-06 19:47:38,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:47:38,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:47:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 1 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:38,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001450508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:38,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:38,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 41 [2021-08-06 19:47:38,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511670271] [2021-08-06 19:47:38,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 19:47:38,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 19:47:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:47:38,569 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:40,175 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-06 19:47:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 19:47:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 19:47:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:40,175 INFO L225 Difference]: With dead ends: 98 [2021-08-06 19:47:40,175 INFO L226 Difference]: Without dead ends: 88 [2021-08-06 19:47:40,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2189.4ms TimeCoverageRelationStatistics Valid=366, Invalid=3416, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 19:47:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-06 19:47:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 40. [2021-08-06 19:47:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2021-08-06 19:47:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-06 19:47:40,177 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 39 [2021-08-06 19:47:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:40,177 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-06 19:47:40,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-06 19:47:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:47:40,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:40,178 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:40,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:40,378 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,SelfDestructingSolverStorable44 [2021-08-06 19:47:40,378 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1438272675, now seen corresponding path program 25 times [2021-08-06 19:47:40,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:40,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393118241] [2021-08-06 19:47:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:40,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:40,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:47:40,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:47:40,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:47:40,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 72.2 percent of original size [2021-08-06 19:47:40,729 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:47:40,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 64.3 percent of original size [2021-08-06 19:47:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:47:40,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:40,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393118241] [2021-08-06 19:47:40,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393118241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:40,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751571126] [2021-08-06 19:47:40,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:47:40,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:40,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:40,755 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) [2021-08-06 19:47:40,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:47:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:47:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:42,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 408, result has 37.0 percent of original size [2021-08-06 19:47:42,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 408, result has 37.0 percent of original size [2021-08-06 19:47:42,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 86.0 percent of original size [2021-08-06 19:47:42,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 86.0 percent of original size [2021-08-06 19:47:42,333 INFO L388 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 181 treesize of output 153 [2021-08-06 19:47:42,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 65.2 percent of original size [2021-08-06 19:47:42,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 65.2 percent of original size [2021-08-06 19:47:42,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.0 percent of original size [2021-08-06 19:47:42,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.0 percent of original size [2021-08-06 19:47:42,916 INFO L388 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 48 treesize of output 44 [2021-08-06 19:47:42,918 INFO L388 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 44 treesize of output 36 [2021-08-06 19:47:42,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:42,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:43,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:43,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-06 19:47:43,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751571126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:43,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:43,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 19:47:43,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404552483] [2021-08-06 19:47:43,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 19:47:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 19:47:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1320, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:47:43,031 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:45,291 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-08-06 19:47:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 19:47:45,292 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 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 39 [2021-08-06 19:47:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:45,292 INFO L225 Difference]: With dead ends: 103 [2021-08-06 19:47:45,292 INFO L226 Difference]: Without dead ends: 71 [2021-08-06 19:47:45,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2540.3ms TimeCoverageRelationStatistics Valid=353, Invalid=4203, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 19:47:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-06 19:47:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2021-08-06 19:47:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2021-08-06 19:47:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-08-06 19:47:45,294 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2021-08-06 19:47:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:45,294 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-08-06 19:47:45,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-08-06 19:47:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 19:47:45,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:45,294 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:45,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 19:47:45,495 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,SelfDestructingSolverStorable45 [2021-08-06 19:47:45,495 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -834070633, now seen corresponding path program 26 times [2021-08-06 19:47:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:45,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081321621] [2021-08-06 19:47:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:45,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:45,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 19:47:45,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 19:47:45,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:47:45,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 19:47:45,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 19:47:45,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 55.6 percent of original size [2021-08-06 19:47:45,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 55.6 percent of original size [2021-08-06 19:47:45,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:47:45,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:47:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:47:45,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081321621] [2021-08-06 19:47:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081321621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055288201] [2021-08-06 19:47:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:47:45,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:45,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:45,812 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) [2021-08-06 19:47:45,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:47:47,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:47:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:47,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:47:47,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:47:47,378 INFO L388 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 302 treesize of output 270 [2021-08-06 19:47:47,651 INFO L388 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 74 treesize of output 72 [2021-08-06 19:47:47,652 INFO L388 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 72 treesize of output 70 [2021-08-06 19:47:48,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:47:48,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:47:48,243 INFO L388 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 54 treesize of output 50 [2021-08-06 19:47:48,248 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:48,248 INFO L388 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 50 treesize of output 45 [2021-08-06 19:47:48,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:48,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:47:48,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:48,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:47:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:47:48,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055288201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:48,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:48,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-08-06 19:47:48,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31600360] [2021-08-06 19:47:48,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:47:48,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:47:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:47:48,391 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2021-08-06 19:47:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:48,908 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-06 19:47:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:47:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 40 [2021-08-06 19:47:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:48,909 INFO L225 Difference]: With dead ends: 69 [2021-08-06 19:47:48,909 INFO L226 Difference]: Without dead ends: 42 [2021-08-06 19:47:48,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:47:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-06 19:47:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-06 19:47:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-08-06 19:47:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-08-06 19:47:48,910 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 40 [2021-08-06 19:47:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:48,910 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-08-06 19:47:48,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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) [2021-08-06 19:47:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-08-06 19:47:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:47:48,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:48,910 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:48,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 19:47:49,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:47:49,125 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -320112037, now seen corresponding path program 27 times [2021-08-06 19:47:49,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:49,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653560634] [2021-08-06 19:47:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:49,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:49,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:47:49,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:47:49,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:47:49,478 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:47:49,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:47:49,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 76.2 percent of original size [2021-08-06 19:47:49,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 76.2 percent of original size [2021-08-06 19:47:49,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:47:49,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:47:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-06 19:47:49,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:49,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653560634] [2021-08-06 19:47:49,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653560634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:49,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130354062] [2021-08-06 19:47:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:47:49,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:49,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:49,575 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) [2021-08-06 19:47:49,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:47:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:47:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:50,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-06 19:47:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:51,212 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 902, result has 21.2 percent of original size [2021-08-06 19:47:51,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 902, result has 21.2 percent of original size [2021-08-06 19:47:51,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 94.4 percent of original size [2021-08-06 19:47:51,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 94.4 percent of original size [2021-08-06 19:47:51,333 INFO L388 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 211 treesize of output 179 [2021-08-06 19:47:51,479 INFO L388 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 65 treesize of output 61 [2021-08-06 19:47:52,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 917, result has 28.0 percent of original size [2021-08-06 19:47:52,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 917, result has 28.0 percent of original size [2021-08-06 19:47:52,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 94.0 percent of original size [2021-08-06 19:47:52,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 94.0 percent of original size [2021-08-06 19:47:52,404 INFO L388 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 245 treesize of output 213 [2021-08-06 19:47:52,408 INFO L388 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 213 treesize of output 177 [2021-08-06 19:47:52,634 INFO L388 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 45 treesize of output 41 [2021-08-06 19:47:52,636 INFO L388 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 41 treesize of output 37 [2021-08-06 19:47:53,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 4.5 percent of original size [2021-08-06 19:47:53,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 4.5 percent of original size [2021-08-06 19:47:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:47:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130354062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:53,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:53,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-08-06 19:47:53,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139337487] [2021-08-06 19:47:53,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 19:47:53,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 19:47:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:47:53,358 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:57,262 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-08-06 19:47:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 19:47:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 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 41 [2021-08-06 19:47:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:57,263 INFO L225 Difference]: With dead ends: 80 [2021-08-06 19:47:57,263 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 19:47:57,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 4636.7ms TimeCoverageRelationStatistics Valid=466, Invalid=5386, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 19:47:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 19:47:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-06 19:47:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2021-08-06 19:47:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-08-06 19:47:57,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2021-08-06 19:47:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:57,264 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-08-06 19:47:57,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-08-06 19:47:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:47:57,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:57,265 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:57,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:57,465 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:47:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1567264745, now seen corresponding path program 28 times [2021-08-06 19:47:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626369441] [2021-08-06 19:47:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:57,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-06 19:47:57,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626369441] [2021-08-06 19:47:57,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626369441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927408495] [2021-08-06 19:47:57,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:57,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:57,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:57,898 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) [2021-08-06 19:47:57,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:47:59,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:59,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:47:59,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:59,452 INFO L388 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 65 treesize of output 57 [2021-08-06 19:47:59,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:47:59,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:47:59,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:47:59,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:47:59,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 900, result has 21.9 percent of original size [2021-08-06 19:47:59,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 900, result has 21.9 percent of original size [2021-08-06 19:47:59,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 76.3 percent of original size [2021-08-06 19:47:59,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 76.3 percent of original size [2021-08-06 19:48:00,008 INFO L388 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 139 treesize of output 119 [2021-08-06 19:48:00,011 INFO L388 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 119 treesize of output 99 [2021-08-06 19:48:00,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:00,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:00,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:00,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:48:00,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927408495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:00,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:00,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2021-08-06 19:48:00,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924321877] [2021-08-06 19:48:00,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 19:48:00,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 19:48:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:48:00,130 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:00,463 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-08-06 19:48:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:48:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:48:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:00,464 INFO L225 Difference]: With dead ends: 49 [2021-08-06 19:48:00,464 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 19:48:00,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:48:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 19:48:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-06 19:48:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2021-08-06 19:48:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-08-06 19:48:00,465 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2021-08-06 19:48:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:00,466 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-08-06 19:48:00,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-08-06 19:48:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 19:48:00,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:00,466 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:00,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 19:48:00,691 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash 945872603, now seen corresponding path program 29 times [2021-08-06 19:48:00,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:00,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088457247] [2021-08-06 19:48:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:00,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:00,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:48:00,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:48:00,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:00,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:00,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:00,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:00,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:00,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,038 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:01,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:48:01,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:48:01,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:01,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:01,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:01,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-06 19:48:01,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:01,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088457247] [2021-08-06 19:48:01,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088457247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:01,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140744120] [2021-08-06 19:48:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:48:01,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:01,304 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) [2021-08-06 19:48:01,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:48:02,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:48:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 19:48:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:02,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1952, result has 10.6 percent of original size [2021-08-06 19:48:02,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1952, result has 10.6 percent of original size [2021-08-06 19:48:03,070 INFO L388 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 230 treesize of output 194 [2021-08-06 19:48:03,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 66.7 percent of original size [2021-08-06 19:48:03,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 66.7 percent of original size [2021-08-06 19:48:03,220 INFO L388 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 49 treesize of output 47 [2021-08-06 19:48:03,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:48:03,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:48:03,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.0 percent of original size [2021-08-06 19:48:03,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.0 percent of original size [2021-08-06 19:48:03,966 INFO L388 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 230 treesize of output 190 [2021-08-06 19:48:03,994 INFO L388 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 190 treesize of output 166 [2021-08-06 19:48:04,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:48:04,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:48:04,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:04,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:48:04,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140744120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:04,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:04,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 38 [2021-08-06 19:48:04,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292538488] [2021-08-06 19:48:04,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 19:48:04,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 19:48:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:48:04,234 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2021-08-06 19:48:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:05,055 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-08-06 19:48:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:48:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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 43 [2021-08-06 19:48:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:05,055 INFO L225 Difference]: With dead ends: 81 [2021-08-06 19:48:05,055 INFO L226 Difference]: Without dead ends: 76 [2021-08-06 19:48:05,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1296.2ms TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:48:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-06 19:48:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-08-06 19:48:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 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) [2021-08-06 19:48:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-08-06 19:48:05,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2021-08-06 19:48:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:05,057 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-08-06 19:48:05,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2021-08-06 19:48:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-08-06 19:48:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:48:05,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:05,072 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:05,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:05,291 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,SelfDestructingSolverStorable49 [2021-08-06 19:48:05,291 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 727995799, now seen corresponding path program 30 times [2021-08-06 19:48:05,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:05,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627135070] [2021-08-06 19:48:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:05,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 107 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-06 19:48:05,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:05,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627135070] [2021-08-06 19:48:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627135070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:05,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169003847] [2021-08-06 19:48:05,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:48:05,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:05,739 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) [2021-08-06 19:48:05,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:48:07,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:48:07,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 19:48:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:07,398 INFO L388 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 65 treesize of output 57 [2021-08-06 19:48:07,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:48:07,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:48:07,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1799, result has 14.2 percent of original size [2021-08-06 19:48:08,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1799, result has 14.2 percent of original size [2021-08-06 19:48:08,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 61.7 percent of original size [2021-08-06 19:48:08,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 61.7 percent of original size [2021-08-06 19:48:08,057 INFO L388 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 155 treesize of output 131 [2021-08-06 19:48:08,060 INFO L388 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 131 treesize of output 111 [2021-08-06 19:48:08,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:08,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:08,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:08,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:48:08,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169003847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:08,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:08,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 36 [2021-08-06 19:48:08,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252381336] [2021-08-06 19:48:08,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 19:48:08,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 19:48:08,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:48:08,173 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 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) [2021-08-06 19:48:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:08,607 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-08-06 19:48:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:48:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 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 44 [2021-08-06 19:48:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:08,608 INFO L225 Difference]: With dead ends: 82 [2021-08-06 19:48:08,608 INFO L226 Difference]: Without dead ends: 77 [2021-08-06 19:48:08,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 756.5ms TimeCoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:48:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-06 19:48:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-08-06 19:48:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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) [2021-08-06 19:48:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-08-06 19:48:08,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 44 [2021-08-06 19:48:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:08,609 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-08-06 19:48:08,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 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) [2021-08-06 19:48:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-08-06 19:48:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:48:08,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:08,609 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:08,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:08,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:08,813 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1543719063, now seen corresponding path program 31 times [2021-08-06 19:48:08,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:08,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271171738] [2021-08-06 19:48:08,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:08,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:08,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:08,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:48:09,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:48:09,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:48:09,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:48:09,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:48:09,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:48:09,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:48:09,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:48:09,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:48:09,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:48:09,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:48:09,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:48:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:48:09,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271171738] [2021-08-06 19:48:09,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271171738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524752901] [2021-08-06 19:48:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:48:09,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:09,468 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) [2021-08-06 19:48:09,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:48:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-06 19:48:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:11,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:48:11,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:48:11,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:48:11,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:48:12,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:48:12,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:48:12,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:48:12,468 INFO L388 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 84 treesize of output 75 [2021-08-06 19:48:12,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:48:12,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:48:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 19 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:48:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524752901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:13,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 51 [2021-08-06 19:48:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590390454] [2021-08-06 19:48:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 19:48:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 19:48:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2389, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:48:13,463 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:14,507 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-08-06 19:48:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:48:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:48:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:14,507 INFO L225 Difference]: With dead ends: 57 [2021-08-06 19:48:14,507 INFO L226 Difference]: Without dead ends: 46 [2021-08-06 19:48:14,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1871.7ms TimeCoverageRelationStatistics Valid=291, Invalid=3615, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 19:48:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-06 19:48:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-06 19:48:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-08-06 19:48:14,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 44 [2021-08-06 19:48:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-08-06 19:48:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-08-06 19:48:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 19:48:14,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:14,509 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:14,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:14,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:14,710 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash 986564643, now seen corresponding path program 32 times [2021-08-06 19:48:14,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:14,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037269667] [2021-08-06 19:48:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:14,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:15,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:48:15,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:48:15,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,093 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:15,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:48:15,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:48:15,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 61.5 percent of original size [2021-08-06 19:48:15,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 61.5 percent of original size [2021-08-06 19:48:15,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:48:15,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:48:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 19:48:15,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:15,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037269667] [2021-08-06 19:48:15,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037269667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:15,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049802295] [2021-08-06 19:48:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:48:15,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:15,381 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) [2021-08-06 19:48:15,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:48:17,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:48:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 19:48:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:17,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 410, result has 37.0 percent of original size [2021-08-06 19:48:17,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 410, result has 37.0 percent of original size [2021-08-06 19:48:17,224 INFO L388 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 238 treesize of output 202 [2021-08-06 19:48:17,477 INFO L388 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 74 treesize of output 72 [2021-08-06 19:48:18,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 398, result has 39.9 percent of original size [2021-08-06 19:48:18,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 398, result has 39.9 percent of original size [2021-08-06 19:48:18,431 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:48:18,432 INFO L388 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 223 treesize of output 206 [2021-08-06 19:48:18,437 INFO L388 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 197 treesize of output 161 [2021-08-06 19:48:18,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:48:18,513 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:48:18,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:18,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 19:48:18,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049802295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:18,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:18,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-08-06 19:48:18,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184785299] [2021-08-06 19:48:18,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 19:48:18,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 19:48:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:48:18,750 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:19,873 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-06 19:48:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:48:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 19:48:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:19,874 INFO L225 Difference]: With dead ends: 98 [2021-08-06 19:48:19,874 INFO L226 Difference]: Without dead ends: 80 [2021-08-06 19:48:19,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1566.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:48:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-06 19:48:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2021-08-06 19:48:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-08-06 19:48:19,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2021-08-06 19:48:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:19,875 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-08-06 19:48:19,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-08-06 19:48:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 19:48:19,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:19,875 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:19,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:20,076 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,SelfDestructingSolverStorable52 [2021-08-06 19:48:20,076 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2060353503, now seen corresponding path program 33 times [2021-08-06 19:48:20,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:20,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861065579] [2021-08-06 19:48:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:20,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:20,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 71.9 percent of original size [2021-08-06 19:48:20,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 71.9 percent of original size [2021-08-06 19:48:20,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:48:20,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 73.7 percent of original size [2021-08-06 19:48:20,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:20,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:48:20,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 78.3 percent of original size [2021-08-06 19:48:20,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:20,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:20,729 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:20,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:48:20,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861065579] [2021-08-06 19:48:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861065579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908911048] [2021-08-06 19:48:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:48:20,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:20,763 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) [2021-08-06 19:48:20,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:48:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:48:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:48:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:22,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2064, result has 12.5 percent of original size [2021-08-06 19:48:23,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2064, result has 12.5 percent of original size [2021-08-06 19:48:23,029 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 111, result has 57.5 percent of original size [2021-08-06 19:48:23,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 111, result has 57.5 percent of original size [2021-08-06 19:48:23,093 INFO L388 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 36 treesize of output 28 [2021-08-06 19:48:23,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 62.9 percent of original size [2021-08-06 19:48:23,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 62.9 percent of original size [2021-08-06 19:48:23,156 INFO L388 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 40 treesize of output 36 [2021-08-06 19:48:23,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:48:23,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 375, result has 43.4 percent of original size [2021-08-06 19:48:23,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.0 percent of original size [2021-08-06 19:48:23,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.0 percent of original size [2021-08-06 19:48:24,004 INFO L388 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 230 treesize of output 190 [2021-08-06 19:48:24,007 INFO L388 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 190 treesize of output 166 [2021-08-06 19:48:24,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:48:24,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:48:24,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:24,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-06 19:48:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908911048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:24,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:24,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2021-08-06 19:48:24,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849111200] [2021-08-06 19:48:24,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 19:48:24,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 19:48:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:48:24,264 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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) [2021-08-06 19:48:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:25,487 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-08-06 19:48:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:48:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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 46 [2021-08-06 19:48:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:25,488 INFO L225 Difference]: With dead ends: 119 [2021-08-06 19:48:25,488 INFO L226 Difference]: Without dead ends: 114 [2021-08-06 19:48:25,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1942.8ms TimeCoverageRelationStatistics Valid=277, Invalid=4145, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 19:48:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-06 19:48:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 66. [2021-08-06 19:48:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 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) [2021-08-06 19:48:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-08-06 19:48:25,490 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 46 [2021-08-06 19:48:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-08-06 19:48:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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) [2021-08-06 19:48:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-08-06 19:48:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-06 19:48:25,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:25,490 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:25,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:25,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:25,691 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 894646807, now seen corresponding path program 34 times [2021-08-06 19:48:25,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:25,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668292475] [2021-08-06 19:48:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:25,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 19:48:26,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:26,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668292475] [2021-08-06 19:48:26,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668292475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:26,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349878979] [2021-08-06 19:48:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:48:26,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:26,146 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) [2021-08-06 19:48:26,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:48:27,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:48:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 19:48:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:28,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:48:28,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 24.3 percent of original size [2021-08-06 19:48:28,257 INFO L388 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 302 treesize of output 270 [2021-08-06 19:48:28,552 INFO L388 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 87 treesize of output 85 [2021-08-06 19:48:28,554 INFO L388 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 85 treesize of output 83 [2021-08-06 19:48:29,405 INFO L388 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 54 treesize of output 50 [2021-08-06 19:48:29,410 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:48:29,410 INFO L388 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 50 treesize of output 45 [2021-08-06 19:48:29,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:48:29,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:48:29,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:29,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 19:48:29,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349878979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:29,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:29,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-08-06 19:48:29,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887252830] [2021-08-06 19:48:29,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 19:48:29,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 19:48:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:48:29,585 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:30,644 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-08-06 19:48:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:48:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-06 19:48:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:30,645 INFO L225 Difference]: With dead ends: 94 [2021-08-06 19:48:30,645 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 19:48:30,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1454.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:48:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 19:48:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-06 19:48:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 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) [2021-08-06 19:48:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-08-06 19:48:30,646 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 46 [2021-08-06 19:48:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-08-06 19:48:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-08-06 19:48:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:48:30,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:30,647 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:30,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:30,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 19:48:30,847 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash 988069795, now seen corresponding path program 35 times [2021-08-06 19:48:30,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:30,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431928926] [2021-08-06 19:48:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:30,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 1 proven. 129 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-06 19:48:31,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:31,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431928926] [2021-08-06 19:48:31,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431928926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:31,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395821757] [2021-08-06 19:48:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:48:31,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:31,424 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) [2021-08-06 19:48:31,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:48:33,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:48:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:48:33,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:33,452 INFO L388 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 65 treesize of output 57 [2021-08-06 19:48:33,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:48:33,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:48:33,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:48:33,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:48:34,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 62.8 percent of original size [2021-08-06 19:48:34,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 62.8 percent of original size [2021-08-06 19:48:34,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 76.2 percent of original size [2021-08-06 19:48:34,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 76.2 percent of original size [2021-08-06 19:48:34,112 INFO L388 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 128 treesize of output 112 [2021-08-06 19:48:34,114 INFO L388 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 112 treesize of output 92 [2021-08-06 19:48:34,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:34,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:48:34,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:34,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-06 19:48:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395821757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:34,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:34,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 39 [2021-08-06 19:48:34,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939913700] [2021-08-06 19:48:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 19:48:34,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 19:48:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:48:34,230 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 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) [2021-08-06 19:48:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:34,740 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-08-06 19:48:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:48:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 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 47 [2021-08-06 19:48:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:34,740 INFO L225 Difference]: With dead ends: 87 [2021-08-06 19:48:34,740 INFO L226 Difference]: Without dead ends: 82 [2021-08-06 19:48:34,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:48:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-06 19:48:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2021-08-06 19:48:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-08-06 19:48:34,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 47 [2021-08-06 19:48:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:34,742 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-08-06 19:48:34,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 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) [2021-08-06 19:48:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-08-06 19:48:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 19:48:34,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:34,742 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:34,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:34,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:34,953 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1732888595, now seen corresponding path program 36 times [2021-08-06 19:48:34,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:34,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884395239] [2021-08-06 19:48:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:34,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:35,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,227 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:48:35,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:48:35,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:48:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 21 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:48:35,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:35,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884395239] [2021-08-06 19:48:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884395239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:35,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779940634] [2021-08-06 19:48:35,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:48:35,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:35,778 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) [2021-08-06 19:48:35,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:48:37,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:48:37,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-06 19:48:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:38,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.9 percent of original size [2021-08-06 19:48:38,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.9 percent of original size [2021-08-06 19:48:38,754 INFO L388 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 186 treesize of output 158 [2021-08-06 19:48:38,918 INFO L388 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 65 treesize of output 61 [2021-08-06 19:48:39,068 INFO L388 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 51 treesize of output 47 [2021-08-06 19:48:39,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-08-06 19:48:39,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 95.8 percent of original size [2021-08-06 19:48:39,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 95.8 percent of original size [2021-08-06 19:48:39,749 INFO L388 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 46 treesize of output 38 [2021-08-06 19:48:39,751 INFO L388 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 38 treesize of output 34 [2021-08-06 19:48:39,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 53.8 percent of original size [2021-08-06 19:48:39,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 53.8 percent of original size [2021-08-06 19:48:39,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:39,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:48:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779940634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:39,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:39,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2021-08-06 19:48:39,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106603328] [2021-08-06 19:48:39,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-06 19:48:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-06 19:48:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 19:48:39,902 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:42,753 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-06 19:48:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:48:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 19:48:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:42,754 INFO L225 Difference]: With dead ends: 68 [2021-08-06 19:48:42,754 INFO L226 Difference]: Without dead ends: 49 [2021-08-06 19:48:42,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 3881.6ms TimeCoverageRelationStatistics Valid=483, Invalid=7707, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 19:48:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-06 19:48:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-06 19:48:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 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) [2021-08-06 19:48:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-08-06 19:48:42,756 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 47 [2021-08-06 19:48:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:42,756 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-08-06 19:48:42,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-08-06 19:48:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:42,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:42,757 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:42,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:42,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 19:48:42,957 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1074662807, now seen corresponding path program 37 times [2021-08-06 19:48:42,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:42,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607999827] [2021-08-06 19:48:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:42,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:43,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:48:43,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:48:43,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:43,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:48:43,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:48:43,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 61.5 percent of original size [2021-08-06 19:48:43,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 61.5 percent of original size [2021-08-06 19:48:43,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:48:43,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:48:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:48:43,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:43,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607999827] [2021-08-06 19:48:43,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607999827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:43,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696066831] [2021-08-06 19:48:43,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:48:43,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:43,574 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) [2021-08-06 19:48:43,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:48:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 19:48:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:45,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 872, result has 23.8 percent of original size [2021-08-06 19:48:45,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 872, result has 23.8 percent of original size [2021-08-06 19:48:45,856 INFO L388 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 270 treesize of output 230 [2021-08-06 19:48:46,203 INFO L388 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 74 treesize of output 72 [2021-08-06 19:48:47,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 400, result has 39.6 percent of original size [2021-08-06 19:48:47,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 400, result has 39.6 percent of original size [2021-08-06 19:48:47,202 INFO L388 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 186 treesize of output 158 [2021-08-06 19:48:47,208 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:48:47,208 INFO L388 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 158 treesize of output 141 [2021-08-06 19:48:47,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:48:47,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:48:47,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:47,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:48:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:48:47,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696066831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:47,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:47,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2021-08-06 19:48:47,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081295622] [2021-08-06 19:48:47,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 19:48:47,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 19:48:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:48:47,552 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:48,546 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-06 19:48:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:48:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:48,547 INFO L225 Difference]: With dead ends: 104 [2021-08-06 19:48:48,547 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 19:48:48,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=229, Invalid=2633, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 19:48:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 19:48:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 53. [2021-08-06 19:48:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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) [2021-08-06 19:48:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-08-06 19:48:48,548 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2021-08-06 19:48:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:48,548 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-08-06 19:48:48,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-08-06 19:48:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 19:48:48,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:48,549 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:48,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:48,749 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,SelfDestructingSolverStorable57 [2021-08-06 19:48:48,749 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1402170459, now seen corresponding path program 38 times [2021-08-06 19:48:48,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:48,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641881254] [2021-08-06 19:48:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:48,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:48,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 84.2 percent of original size [2021-08-06 19:48:48,917 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 84.2 percent of original size [2021-08-06 19:48:48,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 19:48:48,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 19:48:48,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 19:48:48,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 19:48:49,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 19:48:49,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 19:48:49,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.1 percent of original size [2021-08-06 19:48:49,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:48:49,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:48:49,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:49,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 75.0 percent of original size [2021-08-06 19:48:49,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:49,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 58.3 percent of original size [2021-08-06 19:48:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-06 19:48:49,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641881254] [2021-08-06 19:48:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641881254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129249090] [2021-08-06 19:48:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:48:49,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:49,647 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) [2021-08-06 19:48:49,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:48:51,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:48:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:48:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:51,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1855, result has 14.7 percent of original size [2021-08-06 19:48:52,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1855, result has 14.7 percent of original size [2021-08-06 19:48:52,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 71.8 percent of original size [2021-08-06 19:48:52,031 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 71.8 percent of original size [2021-08-06 19:48:52,087 INFO L388 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 213 treesize of output 185 [2021-08-06 19:48:52,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 19:48:52,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 46.3 percent of original size [2021-08-06 19:48:53,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.0 percent of original size [2021-08-06 19:48:53,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.0 percent of original size [2021-08-06 19:48:53,079 INFO L388 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 48 treesize of output 44 [2021-08-06 19:48:53,080 INFO L388 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 44 treesize of output 36 [2021-08-06 19:48:53,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:48:53,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:48:53,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:53,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:48:53,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129249090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:53,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:53,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 54 [2021-08-06 19:48:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898179723] [2021-08-06 19:48:53,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-06 19:48:53,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-06 19:48:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2741, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 19:48:53,220 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:58,528 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2021-08-06 19:48:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-06 19:48:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 19:48:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:58,529 INFO L225 Difference]: With dead ends: 172 [2021-08-06 19:48:58,529 INFO L226 Difference]: Without dead ends: 123 [2021-08-06 19:48:58,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 5723.1ms TimeCoverageRelationStatistics Valid=661, Invalid=13619, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 19:48:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-06 19:48:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 69. [2021-08-06 19:48:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 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) [2021-08-06 19:48:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-08-06 19:48:58,531 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 49 [2021-08-06 19:48:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:58,531 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-08-06 19:48:58,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-08-06 19:48:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 19:48:58,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:58,532 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:58,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 19:48:58,737 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,SelfDestructingSolverStorable58 [2021-08-06 19:48:58,738 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2144499859, now seen corresponding path program 39 times [2021-08-06 19:48:58,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:58,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143244372] [2021-08-06 19:48:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:58,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 10 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:48:59,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:59,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143244372] [2021-08-06 19:48:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143244372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:59,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342212172] [2021-08-06 19:48:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:48:59,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:59,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:59,394 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) [2021-08-06 19:48:59,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:49:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:49:01,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:49:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:01,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 410, result has 37.0 percent of original size [2021-08-06 19:49:01,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 410, result has 37.0 percent of original size [2021-08-06 19:49:01,821 INFO L388 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 238 treesize of output 202 [2021-08-06 19:49:02,062 INFO L388 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 73 treesize of output 71 [2021-08-06 19:49:02,064 INFO L388 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 71 treesize of output 69 [2021-08-06 19:49:02,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.2 percent of original size [2021-08-06 19:49:02,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.2 percent of original size [2021-08-06 19:49:03,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:49:03,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:49:03,050 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:03,050 INFO L388 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 54 treesize of output 49 [2021-08-06 19:49:03,052 INFO L388 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 40 treesize of output 36 [2021-08-06 19:49:03,106 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:49:03,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:49:03,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:49:03,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:49:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:49:03,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342212172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:03,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:03,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2021-08-06 19:49:03,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826155665] [2021-08-06 19:49:03,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 19:49:03,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 19:49:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:49:03,238 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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) [2021-08-06 19:49:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:04,419 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-08-06 19:49:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:49:04,419 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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 49 [2021-08-06 19:49:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:04,419 INFO L225 Difference]: With dead ends: 102 [2021-08-06 19:49:04,419 INFO L226 Difference]: Without dead ends: 69 [2021-08-06 19:49:04,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1717.4ms TimeCoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:49:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-06 19:49:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-06 19:49:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 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) [2021-08-06 19:49:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-08-06 19:49:04,421 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2021-08-06 19:49:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:04,421 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-08-06 19:49:04,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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) [2021-08-06 19:49:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-08-06 19:49:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 19:49:04,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:04,421 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:04,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 19:49:04,622 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,SelfDestructingSolverStorable59 [2021-08-06 19:49:04,622 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 614576147, now seen corresponding path program 40 times [2021-08-06 19:49:04,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:04,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804517241] [2021-08-06 19:49:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:04,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 1 proven. 154 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-06 19:49:05,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804517241] [2021-08-06 19:49:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804517241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:05,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124046058] [2021-08-06 19:49:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:49:05,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:05,301 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) [2021-08-06 19:49:05,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:49:07,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:49:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-06 19:49:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:07,740 INFO L388 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 65 treesize of output 57 [2021-08-06 19:49:07,771 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:49:07,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 19:49:07,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:49:07,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 93.8 percent of original size [2021-08-06 19:49:08,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1955, result has 13.1 percent of original size [2021-08-06 19:49:09,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1955, result has 13.1 percent of original size [2021-08-06 19:49:09,134 INFO L388 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 202 treesize of output 174 [2021-08-06 19:49:09,137 INFO L388 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 174 treesize of output 146 [2021-08-06 19:49:09,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:49:09,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 35.3 percent of original size [2021-08-06 19:49:09,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:49:09,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:49:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 1 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:49:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124046058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:09,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:09,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38] total 51 [2021-08-06 19:49:09,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473445113] [2021-08-06 19:49:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 19:49:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 19:49:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2396, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:49:09,290 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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) [2021-08-06 19:49:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:10,074 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-06 19:49:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 19:49:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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 51 [2021-08-06 19:49:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:10,075 INFO L225 Difference]: With dead ends: 94 [2021-08-06 19:49:10,075 INFO L226 Difference]: Without dead ends: 89 [2021-08-06 19:49:10,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1533.0ms TimeCoverageRelationStatistics Valid=186, Invalid=2784, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:49:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-06 19:49:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 52. [2021-08-06 19:49:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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) [2021-08-06 19:49:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-08-06 19:49:10,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 51 [2021-08-06 19:49:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:10,077 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-08-06 19:49:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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) [2021-08-06 19:49:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-08-06 19:49:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 19:49:10,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:10,077 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:10,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 19:49:10,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:10,278 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1248699299, now seen corresponding path program 41 times [2021-08-06 19:49:10,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:10,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657665558] [2021-08-06 19:49:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:10,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:10,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:49:10,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:49:10,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,742 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 19:49:10,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:49:10,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:49:10,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:49:10,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:49:10,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:49:10,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:49:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 19:49:10,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:10,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657665558] [2021-08-06 19:49:10,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657665558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:10,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804198032] [2021-08-06 19:49:10,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:49:10,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:10,976 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) [2021-08-06 19:49:10,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:49:13,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:49:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-06 19:49:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:13,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1861, result has 14.5 percent of original size [2021-08-06 19:49:13,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1861, result has 14.5 percent of original size [2021-08-06 19:49:13,644 INFO L388 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 313 treesize of output 277 [2021-08-06 19:49:13,925 INFO L388 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 74 treesize of output 72 [2021-08-06 19:49:15,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1902, result has 13.1 percent of original size [2021-08-06 19:49:15,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1902, result has 13.1 percent of original size [2021-08-06 19:49:15,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.9 percent of original size [2021-08-06 19:49:15,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.9 percent of original size [2021-08-06 19:49:15,152 INFO L388 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 154 treesize of output 134 [2021-08-06 19:49:15,158 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:15,158 INFO L388 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 134 treesize of output 117 [2021-08-06 19:49:15,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:49:15,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 53.7 percent of original size [2021-08-06 19:49:15,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:49:15,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:49:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 19:49:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804198032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:15,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2021-08-06 19:49:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851406504] [2021-08-06 19:49:15,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 19:49:15,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 19:49:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1696, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:49:15,510 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 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) [2021-08-06 19:49:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:16,762 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-08-06 19:49:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:49:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 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 51 [2021-08-06 19:49:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:16,763 INFO L225 Difference]: With dead ends: 110 [2021-08-06 19:49:16,763 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 19:49:16,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1805.3ms TimeCoverageRelationStatistics Valid=247, Invalid=3059, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 19:49:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 19:49:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2021-08-06 19:49:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-08-06 19:49:16,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 51 [2021-08-06 19:49:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:16,765 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-08-06 19:49:16,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 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) [2021-08-06 19:49:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-08-06 19:49:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 19:49:16,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:16,765 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:16,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 19:49:16,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:16,965 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash -136536481, now seen corresponding path program 42 times [2021-08-06 19:49:16,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:16,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531326947] [2021-08-06 19:49:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:16,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:17,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,400 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,466 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:17,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:49:17,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:49:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:17,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:17,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531326947] [2021-08-06 19:49:17,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531326947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:17,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834725668] [2021-08-06 19:49:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:49:17,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:17,988 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) [2021-08-06 19:49:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:49:20,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:49:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-06 19:49:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:20,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2064, result has 12.5 percent of original size [2021-08-06 19:49:21,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2064, result has 12.5 percent of original size [2021-08-06 19:49:21,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 72.8 percent of original size [2021-08-06 19:49:21,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 72.8 percent of original size [2021-08-06 19:49:21,070 INFO L388 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 36 treesize of output 28 [2021-08-06 19:49:21,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 62.9 percent of original size [2021-08-06 19:49:21,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 62.9 percent of original size [2021-08-06 19:49:21,145 INFO L388 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 40 treesize of output 36 [2021-08-06 19:49:22,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 389, result has 41.2 percent of original size [2021-08-06 19:49:22,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 389, result has 41.2 percent of original size [2021-08-06 19:49:22,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 83.5 percent of original size [2021-08-06 19:49:22,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 83.5 percent of original size [2021-08-06 19:49:22,471 INFO L388 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 214 treesize of output 178 [2021-08-06 19:49:22,474 INFO L388 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 178 treesize of output 154 [2021-08-06 19:49:22,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:49:22,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 51.2 percent of original size [2021-08-06 19:49:22,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:49:22,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 5.0 percent of original size [2021-08-06 19:49:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:49:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834725668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:22,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 30] total 68 [2021-08-06 19:49:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459059273] [2021-08-06 19:49:22,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-06 19:49:22,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-06 19:49:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 19:49:22,809 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 68 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:26,290 INFO L93 Difference]: Finished difference Result 163 states and 169 transitions. [2021-08-06 19:49:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 19:49:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 19:49:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:26,291 INFO L225 Difference]: With dead ends: 163 [2021-08-06 19:49:26,291 INFO L226 Difference]: Without dead ends: 130 [2021-08-06 19:49:26,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 4440.5ms TimeCoverageRelationStatistics Valid=777, Invalid=15225, Unknown=0, NotChecked=0, Total=16002 [2021-08-06 19:49:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-06 19:49:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 73. [2021-08-06 19:49:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 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) [2021-08-06 19:49:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-08-06 19:49:26,295 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 52 [2021-08-06 19:49:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:26,295 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-08-06 19:49:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-08-06 19:49:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 19:49:26,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:26,295 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:26,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:49:26,496 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,SelfDestructingSolverStorable62 [2021-08-06 19:49:26,496 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash 277445783, now seen corresponding path program 43 times [2021-08-06 19:49:26,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:26,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849097691] [2021-08-06 19:49:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:26,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 19:49:27,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:27,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849097691] [2021-08-06 19:49:27,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849097691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:27,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144712394] [2021-08-06 19:49:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:49:27,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:27,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:27,146 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) [2021-08-06 19:49:27,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:49:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 19:49:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:29,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 408, result has 37.3 percent of original size [2021-08-06 19:49:29,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 408, result has 37.3 percent of original size [2021-08-06 19:49:29,789 INFO L388 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 240 treesize of output 204 [2021-08-06 19:49:30,058 INFO L388 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 74 treesize of output 72 [2021-08-06 19:49:30,060 INFO L388 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 72 treesize of output 70 [2021-08-06 19:49:31,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:49:31,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 96.6 percent of original size [2021-08-06 19:49:31,175 INFO L388 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 54 treesize of output 50 [2021-08-06 19:49:31,180 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:31,180 INFO L388 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 50 treesize of output 45 [2021-08-06 19:49:31,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:49:31,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:49:31,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:49:31,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:49:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-06 19:49:31,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144712394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:31,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:31,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2021-08-06 19:49:31,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792657776] [2021-08-06 19:49:31,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 19:49:31,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 19:49:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:49:31,382 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 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) [2021-08-06 19:49:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:32,781 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-08-06 19:49:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:49:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 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 52 [2021-08-06 19:49:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:32,782 INFO L225 Difference]: With dead ends: 108 [2021-08-06 19:49:32,782 INFO L226 Difference]: Without dead ends: 73 [2021-08-06 19:49:32,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1902.9ms TimeCoverageRelationStatistics Valid=272, Invalid=3150, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 19:49:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-06 19:49:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-06 19:49:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 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) [2021-08-06 19:49:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-06 19:49:32,784 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 52 [2021-08-06 19:49:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:32,784 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-06 19:49:32,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 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) [2021-08-06 19:49:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-06 19:49:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 19:49:32,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:32,784 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:32,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 19:49:32,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:32,985 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 513086743, now seen corresponding path program 44 times [2021-08-06 19:49:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:32,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025176011] [2021-08-06 19:49:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:32,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 1 proven. 180 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-06 19:49:33,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:33,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025176011] [2021-08-06 19:49:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025176011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:33,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548857189] [2021-08-06 19:49:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:49:33,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:33,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:33,696 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) [2021-08-06 19:49:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:49:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:49:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:36,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-06 19:49:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:36,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:49:36,545 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:49:38,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 889, result has 28.2 percent of original size [2021-08-06 19:49:38,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 889, result has 28.2 percent of original size [2021-08-06 19:49:38,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 80.8 percent of original size [2021-08-06 19:49:38,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 80.8 percent of original size [2021-08-06 19:49:38,461 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:38,461 INFO L388 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 226 treesize of output 201 [2021-08-06 19:49:38,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 47.8 percent of original size [2021-08-06 19:49:38,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 47.8 percent of original size [2021-08-06 19:49:40,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 947, result has 22.8 percent of original size [2021-08-06 19:49:40,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 947, result has 22.8 percent of original size [2021-08-06 19:49:40,127 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:40,128 INFO L388 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 67 treesize of output 54 [2021-08-06 19:49:40,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 19:49:40,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 19:49:40,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:49:40,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 19:49:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 1 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:40,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548857189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:40,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:40,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 44] total 61 [2021-08-06 19:49:40,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683072098] [2021-08-06 19:49:40,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-06 19:49:40,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-06 19:49:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3432, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 19:49:40,281 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 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) [2021-08-06 19:49:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:42,780 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-08-06 19:49:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 19:49:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 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 54 [2021-08-06 19:49:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:42,780 INFO L225 Difference]: With dead ends: 128 [2021-08-06 19:49:42,781 INFO L226 Difference]: Without dead ends: 118 [2021-08-06 19:49:42,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 3497.3ms TimeCoverageRelationStatistics Valid=530, Invalid=7660, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 19:49:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-06 19:49:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 55. [2021-08-06 19:49:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 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) [2021-08-06 19:49:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-08-06 19:49:42,783 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 54 [2021-08-06 19:49:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:42,783 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-08-06 19:49:42,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 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) [2021-08-06 19:49:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-08-06 19:49:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 19:49:42,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:42,783 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:42,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:49:42,983 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,SelfDestructingSolverStorable64 [2021-08-06 19:49:42,984 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1769365993, now seen corresponding path program 45 times [2021-08-06 19:49:42,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:42,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044731575] [2021-08-06 19:49:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:42,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:43,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:49:43,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:49:43,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,729 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:49:43,772 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:49:43,774 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.0 percent of original size [2021-08-06 19:49:43,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:49:43,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:49:43,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:49:43,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:49:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:49:43,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:43,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044731575] [2021-08-06 19:49:43,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044731575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:43,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119047115] [2021-08-06 19:49:43,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:49:43,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:43,876 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) [2021-08-06 19:49:43,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:49:46,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:49:46,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-06 19:49:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:47,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.9 percent of original size [2021-08-06 19:49:47,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.9 percent of original size [2021-08-06 19:49:47,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 88.5 percent of original size [2021-08-06 19:49:47,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 88.5 percent of original size [2021-08-06 19:49:47,141 INFO L388 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 186 treesize of output 158 [2021-08-06 19:49:48,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 400, result has 39.4 percent of original size [2021-08-06 19:49:48,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 400, result has 39.4 percent of original size [2021-08-06 19:49:48,425 INFO L388 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 184 treesize of output 164 [2021-08-06 19:49:48,427 INFO L388 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 164 treesize of output 136 [2021-08-06 19:49:48,533 INFO L388 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 43 treesize of output 37 [2021-08-06 19:49:48,662 INFO L388 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 32 treesize of output 28 [2021-08-06 19:49:48,664 INFO L388 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 28 treesize of output 24 [2021-08-06 19:49:48,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:49:48,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:49:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:49:48,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119047115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:48,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:48,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-08-06 19:49:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147247415] [2021-08-06 19:49:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-06 19:49:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-06 19:49:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 19:49:48,906 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:50,691 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-08-06 19:49:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:49:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 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 54 [2021-08-06 19:49:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:50,692 INFO L225 Difference]: With dead ends: 116 [2021-08-06 19:49:50,692 INFO L226 Difference]: Without dead ends: 95 [2021-08-06 19:49:50,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 3006.6ms TimeCoverageRelationStatistics Valid=306, Invalid=5244, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 19:49:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-06 19:49:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-08-06 19:49:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-06 19:49:50,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2021-08-06 19:49:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:50,694 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-06 19:49:50,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-06 19:49:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 19:49:50,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:50,694 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:50,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 19:49:50,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:50,895 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:49:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1012259291, now seen corresponding path program 46 times [2021-08-06 19:49:50,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:50,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628220644] [2021-08-06 19:49:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:50,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:51,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 86.4 percent of original size [2021-08-06 19:49:51,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:49:51,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 19:49:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 69 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:52,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:52,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628220644] [2021-08-06 19:49:52,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628220644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:52,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956695987] [2021-08-06 19:49:52,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:49:52,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:52,018 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) [2021-08-06 19:49:52,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:49:54,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:49:54,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-06 19:49:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:54,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:49:54,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:49:56,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:49:56,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 19:49:56,733 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:49:56,733 INFO L388 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 84 treesize of output 75 [2021-08-06 19:49:56,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:49:56,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 19:49:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956695987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:58,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 72 [2021-08-06 19:49:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510074414] [2021-08-06 19:49:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-06 19:49:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-06 19:49:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=4708, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 19:49:58,261 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:59,971 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-08-06 19:49:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 19:49:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 19:49:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:59,972 INFO L225 Difference]: With dead ends: 111 [2021-08-06 19:49:59,972 INFO L226 Difference]: Without dead ends: 96 [2021-08-06 19:49:59,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 3347.3ms TimeCoverageRelationStatistics Valid=728, Invalid=7462, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 19:49:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-06 19:49:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2021-08-06 19:49:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 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) [2021-08-06 19:49:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-08-06 19:49:59,973 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 55 [2021-08-06 19:49:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:59,973 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-08-06 19:49:59,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-08-06 19:49:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 19:49:59,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:59,974 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:50:00,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:00,180 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:50:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -582743533, now seen corresponding path program 47 times [2021-08-06 19:50:00,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:00,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041187308] [2021-08-06 19:50:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:00,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:00,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 80.8 percent of original size [2021-08-06 19:50:00,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:50:00,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 19:50:00,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:50:00,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 50.0 percent of original size [2021-08-06 19:50:00,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:50:00,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 33.3 percent of original size [2021-08-06 19:50:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 12 proven. 157 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:50:00,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:00,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041187308] [2021-08-06 19:50:00,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041187308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:00,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838176102] [2021-08-06 19:50:00,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:50:00,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:00,779 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) [2021-08-06 19:50:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:50:03,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:50:03,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-06 19:50:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:03,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 408, result has 37.3 percent of original size [2021-08-06 19:50:04,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 408, result has 37.3 percent of original size [2021-08-06 19:50:04,125 INFO L388 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 240 treesize of output 204 [2021-08-06 19:50:04,401 INFO L388 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 74 treesize of output 72 [2021-08-06 19:50:04,403 INFO L388 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 72 treesize of output 70 [2021-08-06 19:50:05,520 INFO L388 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 54 treesize of output 50 [2021-08-06 19:50:05,524 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:50:05,524 INFO L388 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 50 treesize of output 45 [2021-08-06 19:50:05,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:50:05,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 60.0 percent of original size [2021-08-06 19:50:05,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:50:05,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:50:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 1 proven. 168 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:50:05,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838176102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:05,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:50:05,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 46 [2021-08-06 19:50:05,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949800845] [2021-08-06 19:50:05,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 19:50:05,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 19:50:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1929, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 19:50:05,693 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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) [2021-08-06 19:50:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:07,220 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-06 19:50:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:50:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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 55 [2021-08-06 19:50:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:07,220 INFO L225 Difference]: With dead ends: 94 [2021-08-06 19:50:07,221 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 19:50:07,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2033.5ms TimeCoverageRelationStatistics Valid=310, Invalid=3596, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 19:50:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 19:50:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-06 19:50:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-08-06 19:50:07,222 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2021-08-06 19:50:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:07,222 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-08-06 19:50:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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) [2021-08-06 19:50:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-08-06 19:50:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-06 19:50:07,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:07,222 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:07,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:50:07,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 19:50:07,423 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:50:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash -251705649, now seen corresponding path program 48 times [2021-08-06 19:50:07,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:07,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074482269] [2021-08-06 19:50:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:07,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:07,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 75.0 percent of original size [2021-08-06 19:50:07,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 75.0 percent of original size [2021-08-06 19:50:07,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 19:50:07,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 19:50:07,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:07,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,093 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.7 percent of original size [2021-08-06 19:50:08,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:50:08,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.2 percent of original size [2021-08-06 19:50:08,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:50:08,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:50:08,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:50:08,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 41.2 percent of original size [2021-08-06 19:50:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:50:08,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:08,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074482269] [2021-08-06 19:50:08,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074482269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:08,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456029313] [2021-08-06 19:50:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:50:08,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:08,566 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) [2021-08-06 19:50:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:50:11,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:50:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 19:50:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:12,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 872, result has 23.8 percent of original size [2021-08-06 19:50:12,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 872, result has 23.8 percent of original size [2021-08-06 19:50:12,275 INFO L388 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 241 treesize of output 205 [2021-08-06 19:50:12,457 INFO L388 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 65 treesize of output 61 [2021-08-06 19:50:13,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 400, result has 38.8 percent of original size [2021-08-06 19:50:13,709 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 400, result has 38.8 percent of original size [2021-08-06 19:50:13,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 83.0 percent of original size [2021-08-06 19:50:13,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 83.0 percent of original size [2021-08-06 19:50:13,786 INFO L388 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 178 treesize of output 150 [2021-08-06 19:50:13,788 INFO L388 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 150 treesize of output 130 [2021-08-06 19:50:13,912 INFO L388 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 37 treesize of output 33 [2021-08-06 19:50:13,914 INFO L388 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 29 [2021-08-06 19:50:14,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:50:14,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 5.6 percent of original size [2021-08-06 19:50:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:50:14,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456029313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:14,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:50:14,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-08-06 19:50:14,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937087769] [2021-08-06 19:50:14,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-06 19:50:14,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-06 19:50:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 19:50:14,212 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:17,151 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-08-06 19:50:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:50:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-06 19:50:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:17,152 INFO L225 Difference]: With dead ends: 119 [2021-08-06 19:50:17,152 INFO L226 Difference]: Without dead ends: 98 [2021-08-06 19:50:17,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 4315.3ms TimeCoverageRelationStatistics Valid=310, Invalid=5852, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 19:50:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-06 19:50:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-08-06 19:50:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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) [2021-08-06 19:50:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-08-06 19:50:17,154 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 56 [2021-08-06 19:50:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:17,155 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-08-06 19:50:17,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-08-06 19:50:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 19:50:17,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:17,155 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:17,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:50:17,368 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,SelfDestructingSolverStorable68 [2021-08-06 19:50:17,369 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:50:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1420534163, now seen corresponding path program 49 times [2021-08-06 19:50:17,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:17,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177950283] [2021-08-06 19:50:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:17,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-08-06 19:50:17,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177950283] [2021-08-06 19:50:17,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177950283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:50:17,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:50:17,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-06 19:50:17,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225033780] [2021-08-06 19:50:17,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:50:17,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:50:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:50:17,540 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:17,562 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-08-06 19:50:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:50:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 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 57 [2021-08-06 19:50:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:17,563 INFO L225 Difference]: With dead ends: 58 [2021-08-06 19:50:17,563 INFO L226 Difference]: Without dead ends: 58 [2021-08-06 19:50:17,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:50:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-06 19:50:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-06 19:50:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-08-06 19:50:17,564 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 57 [2021-08-06 19:50:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:17,564 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-08-06 19:50:17,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-08-06 19:50:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 19:50:17,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:17,564 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:17,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-06 19:50:17,565 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:50:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash -779913125, now seen corresponding path program 50 times [2021-08-06 19:50:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:17,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119077039] [2021-08-06 19:50:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:17,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 92 proven. 13 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-08-06 19:50:17,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:17,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119077039] [2021-08-06 19:50:17,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119077039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:17,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201885697] [2021-08-06 19:50:17,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:50:17,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:17,699 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) [2021-08-06 19:50:17,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:50:20,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:50:20,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:50:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:20,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:50:20,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:50:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-08-06 19:50:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201885697] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:50:20,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 19:50:20,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 17 [2021-08-06 19:50:20,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260002622] [2021-08-06 19:50:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:50:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:50:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:50:20,924 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:20,942 INFO L93 Difference]: Finished difference Result 34 states and 33 transitions. [2021-08-06 19:50:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:50:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 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 57 [2021-08-06 19:50:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:20,942 INFO L225 Difference]: With dead ends: 34 [2021-08-06 19:50:20,942 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 19:50:20,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:50:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 19:50:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 19:50:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 19:50:20,943 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2021-08-06 19:50:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 19:50:20,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 19:50:20,943 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 19:50:20,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:50:20,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:50:20,945 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:50:20,946 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 19:50:20,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 19:50:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:21,170 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:50:21,170 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:50:21,172 INFO L202 PluginConnector]: Adding new model poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:50:21 BasicIcfg [2021-08-06 19:50:21,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:50:21,173 INFO L168 Benchmark]: Toolchain (without parser) took 240019.49 ms. Allocated memory was 156.2 MB in the beginning and 1.1 GB in the end (delta: 946.9 MB). Free memory was 135.3 MB in the beginning and 777.9 MB in the end (delta: -642.5 MB). Peak memory consumption was 303.7 MB. Max. memory is 8.0 GB. [2021-08-06 19:50:21,173 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 156.2 MB. Free memory was 137.9 MB in the beginning and 137.8 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:50:21,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 156.2 MB. Free memory was 135.3 MB in the beginning and 133.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:50:21,174 INFO L168 Benchmark]: Boogie Preprocessor took 49.61 ms. Allocated memory is still 156.2 MB. Free memory was 133.5 MB in the beginning and 131.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:50:21,174 INFO L168 Benchmark]: RCFGBuilder took 683.56 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 96.8 MB in the end (delta: 34.8 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-08-06 19:50:21,174 INFO L168 Benchmark]: TraceAbstraction took 239237.13 ms. Allocated memory was 156.2 MB in the beginning and 1.1 GB in the end (delta: 946.9 MB). Free memory was 96.2 MB in the beginning and 777.9 MB in the end (delta: -681.6 MB). Peak memory consumption was 265.2 MB. Max. memory is 8.0 GB. [2021-08-06 19:50:21,174 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 156.2 MB. Free memory was 137.9 MB in the beginning and 137.8 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 156.2 MB. Free memory was 135.3 MB in the beginning and 133.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.61 ms. Allocated memory is still 156.2 MB. Free memory was 133.5 MB in the beginning and 131.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 683.56 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 96.8 MB in the end (delta: 34.8 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 239237.13 ms. Allocated memory was 156.2 MB in the beginning and 1.1 GB in the end (delta: 946.9 MB). Free memory was 96.2 MB in the beginning and 777.9 MB in the end (delta: -681.6 MB). Peak memory consumption was 265.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1102, positive: 912, positive conditional: 912, positive unconditional: 0, negative: 190, negative conditional: 190, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 912, positive: 912, positive conditional: 0, positive unconditional: 912, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 240, positive: 240, positive conditional: 0, positive unconditional: 240, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 240, positive: 240, positive conditional: 0, positive unconditional: 240, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 912, positive: 672, positive conditional: 0, positive unconditional: 672, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 240, unknown conditional: 0, unknown unconditional: 240] , Statistics on independence cache: Total cache size (in pairs): 240, Positive cache size: 240, Positive conditional cache size: 0, Positive unconditional cache size: 240, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 190 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 299]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 239171.9ms, OverallIterations: 71, TraceHistogramMax: 14, EmptinessCheckTime: 54.2ms, AutomataDifference: 63633.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 102.1ms, PartialOrderReductionTime: 93.6ms, HoareTripleCheckerStatistics: 1506 SDtfs, 5139 SDslu, 22533 SDs, 0 SdLazy, 38007 SolverSat, 2814 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15663.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3903 GetRequests, 1276 SyntacticMatches, 46 SemanticMatches, 2581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23022 ImplicationChecksByTransitivity, 83420.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=0, InterpolantAutomatonStates: 1535, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121.8ms AutomataMinimizationTime, 71 MinimizatonAttempts, 1256 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 547.9ms SsaConstructionTime, 3180.2ms SatisfiabilityAnalysisTime, 97128.4ms InterpolantComputationTime, 4227 NumberOfCodeBlocks, 4226 NumberOfCodeBlocksAsserted, 238 NumberOfCheckSat, 4106 ConstructedInterpolants, 356 QuantifiedInterpolants, 50977 SizeOfPredicates, 326 NumberOfNonLiveVariables, 10506 ConjunctsInSsa, 2013 ConjunctsInUnsatCore, 121 InterpolantComputations, 22 PerfectInterpolantSequences, 3672/11177 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 19:50:21,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...