/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:45:43,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:45:43,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:45:43,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:45:43,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 14:45:43,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 14:45:43,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 14:45:43,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:45:43,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:45:43,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:45:43,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:45:43,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:45:43,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:45:43,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:45:43,988 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:45:43,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:45:43,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:45:43,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:45:43,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:45:43,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:45:43,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:45:43,991 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:45:43,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:45:43,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:45:44,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:45:44,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:45:44,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:45:44,279 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:45:44,280 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:45:44,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2021-08-06 14:45:44,281 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2021-08-06 14:45:44,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:45:44,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:45:44,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:45:44,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:45:44,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:45:44,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:45:44,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:45:44,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:45:44,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:45:44,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:45:44,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:45:44,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:45:44,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:45:44,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/1) ... [2021-08-06 14:45:44,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:45:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:44,403 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 14:45:44,415 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 14:45:44,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:45:44,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:45:44,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:45:44,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:45:44,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:45:44,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:45:44,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:45:44,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:45:44,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:45:44,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:45:44,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:45:44,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:45:44,445 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:45:44,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:45:44,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:45:44,446 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 14:45:44,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:45:44,671 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-06 14:45:44,671 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 14:45:44,671 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:45:44,672 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 14:45:44,672 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-06 14:45:44,673 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:45:44 BoogieIcfgContainer [2021-08-06 14:45:44,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:45:44,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:45:44,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:45:44,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:45:44,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:45:44" (1/2) ... [2021-08-06 14:45:44,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a59bf3 and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:45:44, skipping insertion in model container [2021-08-06 14:45:44,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:45:44" (2/2) ... [2021-08-06 14:45:44,679 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2021-08-06 14:45:44,682 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:45:44,683 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:45:44,683 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:45:44,683 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:45:44,747 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 14:45:44,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:45:44,800 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 14:45:44,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 14:45:44,808 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2021-08-06 14:45:44,849 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:45:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:45:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:45:44,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:44,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:44,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 530210260, now seen corresponding path program 1 times [2021-08-06 14:45:44,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:44,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204863712] [2021-08-06 14:45:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:44,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:45,029 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 14:45:45,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:45,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204863712] [2021-08-06 14:45:45,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204863712] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:45:45,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:45:45,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:45:45,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153028570] [2021-08-06 14:45:45,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:45:45,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:45:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:45:45,052 INFO L87 Difference]: Start difference. First operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 14:45:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:45,108 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2021-08-06 14:45:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:45:45,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 14:45:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:45,134 INFO L225 Difference]: With dead ends: 324 [2021-08-06 14:45:45,135 INFO L226 Difference]: Without dead ends: 319 [2021-08-06 14:45:45,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:45:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-06 14:45:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2021-08-06 14:45:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 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 14:45:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2021-08-06 14:45:45,208 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2021-08-06 14:45:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:45,209 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2021-08-06 14:45:45,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 14:45:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2021-08-06 14:45:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:45:45,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:45,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:45,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:45:45,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1551040747, now seen corresponding path program 1 times [2021-08-06 14:45:45,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:45,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522429012] [2021-08-06 14:45:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:45,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:45,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:45,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522429012] [2021-08-06 14:45:45,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522429012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:45,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069875453] [2021-08-06 14:45:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:45,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:45,310 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 14:45:45,311 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 14:45:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:45:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069875453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:45:45,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:45:45,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-08-06 14:45:45,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597446902] [2021-08-06 14:45:45,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:45:45,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:45,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:45:45,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:45:45,688 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:45:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:45,749 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2021-08-06 14:45:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:45:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:45:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:45,753 INFO L225 Difference]: With dead ends: 500 [2021-08-06 14:45:45,754 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 14:45:45,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:45:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 14:45:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2021-08-06 14:45:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 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 14:45:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2021-08-06 14:45:45,786 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2021-08-06 14:45:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:45,786 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2021-08-06 14:45:45,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:45:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2021-08-06 14:45:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:45:45,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:45,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:45,820 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 14:45:46,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:46,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash -874800337, now seen corresponding path program 1 times [2021-08-06 14:45:46,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:46,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764216533] [2021-08-06 14:45:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:46,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:46,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:46,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764216533] [2021-08-06 14:45:46,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764216533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:46,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528728853] [2021-08-06 14:45:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:46,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:46,085 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 14:45:46,113 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 14:45:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:45:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:46,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528728853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:45:46,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:45:46,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-08-06 14:45:46,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548579406] [2021-08-06 14:45:46,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:45:46,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:45:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:45:46,293 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:45:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:46,333 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2021-08-06 14:45:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:45:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:45:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:46,341 INFO L225 Difference]: With dead ends: 734 [2021-08-06 14:45:46,341 INFO L226 Difference]: Without dead ends: 715 [2021-08-06 14:45:46,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:45:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-06 14:45:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2021-08-06 14:45:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 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 14:45:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2021-08-06 14:45:46,375 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2021-08-06 14:45:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:46,375 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2021-08-06 14:45:46,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:45:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2021-08-06 14:45:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:46,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:46,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:46,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:45:46,602 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,SelfDestructingSolverStorable2 [2021-08-06 14:45:46,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1239957648, now seen corresponding path program 1 times [2021-08-06 14:45:46,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:46,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274128299] [2021-08-06 14:45:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:46,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:46,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:46,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274128299] [2021-08-06 14:45:46,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274128299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:46,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628972572] [2021-08-06 14:45:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:46,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:46,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:46,805 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 14:45:46,828 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 14:45:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:46,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:45:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:47,212 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 17 treesize of output 9 [2021-08-06 14:45:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628972572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:47,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:47,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:47,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494746358] [2021-08-06 14:45:47,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:47,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:47,280 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:47,518 INFO L93 Difference]: Finished difference Result 1065 states and 4160 transitions. [2021-08-06 14:45:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:45:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:47,526 INFO L225 Difference]: With dead ends: 1065 [2021-08-06 14:45:47,526 INFO L226 Difference]: Without dead ends: 1050 [2021-08-06 14:45:47,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:45:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-08-06 14:45:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 711. [2021-08-06 14:45:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.9704225352112674) internal successors, (2819), 710 states have internal predecessors, (2819), 0 states have call successors, (0), 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 14:45:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2819 transitions. [2021-08-06 14:45:47,552 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2819 transitions. Word has length 19 [2021-08-06 14:45:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2819 transitions. [2021-08-06 14:45:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2819 transitions. [2021-08-06 14:45:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:47,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:47,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:47,581 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 14:45:47,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:47,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash -654623696, now seen corresponding path program 2 times [2021-08-06 14:45:47,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:47,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335319523] [2021-08-06 14:45:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:47,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:47,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335319523] [2021-08-06 14:45:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335319523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789800741] [2021-08-06 14:45:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:45:47,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:47,915 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 14:45:47,916 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 14:45:47,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:45:47,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:45:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:48,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:48,177 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 11 treesize of output 15 [2021-08-06 14:45:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:48,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789800741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:48,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:48,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992601171] [2021-08-06 14:45:48,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:48,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:48,388 INFO L87 Difference]: Start difference. First operand 711 states and 2819 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:48,797 INFO L93 Difference]: Finished difference Result 1014 states and 3972 transitions. [2021-08-06 14:45:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:45:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:48,805 INFO L225 Difference]: With dead ends: 1014 [2021-08-06 14:45:48,806 INFO L226 Difference]: Without dead ends: 992 [2021-08-06 14:45:48,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:45:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-08-06 14:45:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 723. [2021-08-06 14:45:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 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 14:45:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2021-08-06 14:45:48,832 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2021-08-06 14:45:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2021-08-06 14:45:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2021-08-06 14:45:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:48,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:48,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:48,860 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 14:45:49,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:49,049 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash 958943038, now seen corresponding path program 3 times [2021-08-06 14:45:49,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:49,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302216083] [2021-08-06 14:45:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:49,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:49,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:49,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302216083] [2021-08-06 14:45:49,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302216083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:49,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377256645] [2021-08-06 14:45:49,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:45:49,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:49,189 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 14:45:49,194 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 14:45:49,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:45:49,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:49,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:45:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:49,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:49,460 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 11 treesize of output 15 [2021-08-06 14:45:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:49,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377256645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:49,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:49,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:49,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944732410] [2021-08-06 14:45:49,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:49,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:49,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:49,642 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:50,049 INFO L93 Difference]: Finished difference Result 1007 states and 3952 transitions. [2021-08-06 14:45:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:45:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:50,056 INFO L225 Difference]: With dead ends: 1007 [2021-08-06 14:45:50,056 INFO L226 Difference]: Without dead ends: 992 [2021-08-06 14:45:50,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:45:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-08-06 14:45:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 723. [2021-08-06 14:45:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 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 14:45:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2021-08-06 14:45:50,087 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2021-08-06 14:45:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2021-08-06 14:45:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2021-08-06 14:45:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:50,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:50,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:50,111 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 14:45:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:50,303 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash -890460270, now seen corresponding path program 4 times [2021-08-06 14:45:50,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:50,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96185798] [2021-08-06 14:45:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:50,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:50,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:50,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96185798] [2021-08-06 14:45:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96185798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:50,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3809079] [2021-08-06 14:45:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:45:50,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:50,421 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 14:45:50,466 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 14:45:50,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:45:50,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:45:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:50,771 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 17 treesize of output 9 [2021-08-06 14:45:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3809079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:50,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:50,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:50,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156423090] [2021-08-06 14:45:50,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:50,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:50,834 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:51,149 INFO L93 Difference]: Finished difference Result 1455 states and 5699 transitions. [2021-08-06 14:45:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:45:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:51,160 INFO L225 Difference]: With dead ends: 1455 [2021-08-06 14:45:51,160 INFO L226 Difference]: Without dead ends: 1437 [2021-08-06 14:45:51,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:45:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-08-06 14:45:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 799. [2021-08-06 14:45:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 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 14:45:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2021-08-06 14:45:51,194 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2021-08-06 14:45:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:51,194 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2021-08-06 14:45:51,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2021-08-06 14:45:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:51,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:51,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:51,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-06 14:45:51,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:51,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash -809061214, now seen corresponding path program 5 times [2021-08-06 14:45:51,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:51,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994832180] [2021-08-06 14:45:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:51,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:51,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:51,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994832180] [2021-08-06 14:45:51,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994832180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:51,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112762266] [2021-08-06 14:45:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:45:51,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:51,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:51,545 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 14:45:51,577 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 14:45:51,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:45:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:45:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:51,867 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 15 treesize of output 7 [2021-08-06 14:45:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:51,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112762266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:51,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:51,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:51,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557455] [2021-08-06 14:45:51,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:51,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:51,956 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:52,358 INFO L93 Difference]: Finished difference Result 1291 states and 5089 transitions. [2021-08-06 14:45:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:45:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:52,368 INFO L225 Difference]: With dead ends: 1291 [2021-08-06 14:45:52,368 INFO L226 Difference]: Without dead ends: 1273 [2021-08-06 14:45:52,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:45:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-08-06 14:45:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 819. [2021-08-06 14:45:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 4.02078239608802) internal successors, (3289), 818 states have internal predecessors, (3289), 0 states have call successors, (0), 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 14:45:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3289 transitions. [2021-08-06 14:45:52,398 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3289 transitions. Word has length 19 [2021-08-06 14:45:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:52,398 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3289 transitions. [2021-08-06 14:45:52,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3289 transitions. [2021-08-06 14:45:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:52,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:52,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:52,427 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 14:45:52,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:52,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 804505520, now seen corresponding path program 6 times [2021-08-06 14:45:52,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:52,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611670344] [2021-08-06 14:45:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:52,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:52,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611670344] [2021-08-06 14:45:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611670344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951294160] [2021-08-06 14:45:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:45:52,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:52,718 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 14:45:52,723 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 14:45:52,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:45:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:45:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:52,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:52,969 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 11 treesize of output 15 [2021-08-06 14:45:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:53,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951294160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:53,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:45:53,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745719484] [2021-08-06 14:45:53,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:45:53,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:45:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:45:53,150 INFO L87 Difference]: Start difference. First operand 819 states and 3289 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:53,270 INFO L93 Difference]: Finished difference Result 1065 states and 4245 transitions. [2021-08-06 14:45:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:45:53,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) Word has length 19 [2021-08-06 14:45:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:53,277 INFO L225 Difference]: With dead ends: 1065 [2021-08-06 14:45:53,277 INFO L226 Difference]: Without dead ends: 1054 [2021-08-06 14:45:53,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:45:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-08-06 14:45:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 825. [2021-08-06 14:45:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 4.020631067961165) internal successors, (3313), 824 states have internal predecessors, (3313), 0 states have call successors, (0), 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 14:45:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 3313 transitions. [2021-08-06 14:45:53,303 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 3313 transitions. Word has length 19 [2021-08-06 14:45:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:53,304 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 3313 transitions. [2021-08-06 14:45:53,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 3313 transitions. [2021-08-06 14:45:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:53,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:53,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:53,333 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 14:45:53,520 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,SelfDestructingSolverStorable8 [2021-08-06 14:45:53,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1396703890, now seen corresponding path program 1 times [2021-08-06 14:45:53,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:53,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613645547] [2021-08-06 14:45:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:53,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:53,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:53,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613645547] [2021-08-06 14:45:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613645547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:53,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752861563] [2021-08-06 14:45:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:53,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:53,640 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 14:45:53,641 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 14:45:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:53,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:45:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:53,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:53,944 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 13 treesize of output 17 [2021-08-06 14:45:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:54,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752861563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:54,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:54,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:45:54,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674237340] [2021-08-06 14:45:54,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:45:54,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:45:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:45:54,087 INFO L87 Difference]: Start difference. First operand 825 states and 3313 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:45:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:54,341 INFO L93 Difference]: Finished difference Result 1245 states and 4941 transitions. [2021-08-06 14:45:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:45:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 19 [2021-08-06 14:45:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:54,350 INFO L225 Difference]: With dead ends: 1245 [2021-08-06 14:45:54,350 INFO L226 Difference]: Without dead ends: 1228 [2021-08-06 14:45:54,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:45:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-08-06 14:45:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 845. [2021-08-06 14:45:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 4.0260663507109005) internal successors, (3398), 844 states have internal predecessors, (3398), 0 states have call successors, (0), 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 14:45:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3398 transitions. [2021-08-06 14:45:54,381 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3398 transitions. Word has length 19 [2021-08-06 14:45:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:54,382 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3398 transitions. [2021-08-06 14:45:54,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:45:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3398 transitions. [2021-08-06 14:45:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:54,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:54,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:54,409 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 14:45:54,599 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,SelfDestructingSolverStorable9 [2021-08-06 14:45:54,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash -883177038, now seen corresponding path program 2 times [2021-08-06 14:45:54,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:54,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888560918] [2021-08-06 14:45:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:54,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:54,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:54,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888560918] [2021-08-06 14:45:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888560918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:54,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387067245] [2021-08-06 14:45:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:45:54,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:54,700 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 14:45:54,701 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 14:45:54,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:45:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:54,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:45:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:54,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:54,929 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 11 treesize of output 15 [2021-08-06 14:45:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387067245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:55,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:55,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 14:45:55,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294995905] [2021-08-06 14:45:55,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:45:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:45:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:45:55,092 INFO L87 Difference]: Start difference. First operand 845 states and 3398 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 14:45:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:55,183 INFO L93 Difference]: Finished difference Result 1126 states and 4474 transitions. [2021-08-06 14:45:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:45:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:45:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:55,190 INFO L225 Difference]: With dead ends: 1126 [2021-08-06 14:45:55,191 INFO L226 Difference]: Without dead ends: 1102 [2021-08-06 14:45:55,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:45:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-08-06 14:45:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 862. [2021-08-06 14:45:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 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 14:45:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2021-08-06 14:45:55,235 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2021-08-06 14:45:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:55,235 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2021-08-06 14:45:55,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 14:45:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2021-08-06 14:45:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:55,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:55,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:55,264 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 14:45:55,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 14:45:55,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 192534118, now seen corresponding path program 3 times [2021-08-06 14:45:55,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:55,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909000681] [2021-08-06 14:45:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:55,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:55,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:55,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909000681] [2021-08-06 14:45:55,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909000681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:55,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636316158] [2021-08-06 14:45:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:45:55,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:55,573 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 14:45:55,592 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 14:45:55,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:45:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:45:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:55,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:55,888 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 14:45:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636316158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:56,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:56,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:45:56,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533063483] [2021-08-06 14:45:56,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:45:56,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:56,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:45:56,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:45:56,066 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:56,205 INFO L93 Difference]: Finished difference Result 1121 states and 4460 transitions. [2021-08-06 14:45:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:45:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) Word has length 19 [2021-08-06 14:45:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:56,212 INFO L225 Difference]: With dead ends: 1121 [2021-08-06 14:45:56,212 INFO L226 Difference]: Without dead ends: 1104 [2021-08-06 14:45:56,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:45:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-08-06 14:45:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 862. [2021-08-06 14:45:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 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 14:45:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2021-08-06 14:45:56,240 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2021-08-06 14:45:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:56,241 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2021-08-06 14:45:56,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2021-08-06 14:45:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:56,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:56,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:56,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:45:56,465 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,SelfDestructingSolverStorable11 [2021-08-06 14:45:56,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -987196392, now seen corresponding path program 4 times [2021-08-06 14:45:56,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:56,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661702771] [2021-08-06 14:45:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:56,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:56,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:56,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661702771] [2021-08-06 14:45:56,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661702771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:56,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858421961] [2021-08-06 14:45:56,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:45:56,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:56,562 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 14:45:56,563 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 14:45:56,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:45:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:45:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:56,971 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 11 treesize of output 7 [2021-08-06 14:45:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:57,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858421961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:57,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:57,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:57,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330871164] [2021-08-06 14:45:57,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:57,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:57,033 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:57,362 INFO L93 Difference]: Finished difference Result 1642 states and 6494 transitions. [2021-08-06 14:45:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:45:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:57,380 INFO L225 Difference]: With dead ends: 1642 [2021-08-06 14:45:57,380 INFO L226 Difference]: Without dead ends: 1624 [2021-08-06 14:45:57,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:45:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-08-06 14:45:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 924. [2021-08-06 14:45:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.073672806067172) internal successors, (3760), 923 states have internal predecessors, (3760), 0 states have call successors, (0), 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 14:45:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3760 transitions. [2021-08-06 14:45:57,415 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3760 transitions. Word has length 19 [2021-08-06 14:45:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:57,415 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 3760 transitions. [2021-08-06 14:45:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3760 transitions. [2021-08-06 14:45:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:57,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:57,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:57,451 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 14:45:57,622 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,SelfDestructingSolverStorable12 [2021-08-06 14:45:57,623 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -399451070, now seen corresponding path program 5 times [2021-08-06 14:45:57,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:57,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013358908] [2021-08-06 14:45:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:57,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:57,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013358908] [2021-08-06 14:45:57,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013358908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886457223] [2021-08-06 14:45:57,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:45:57,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:57,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:57,713 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 14:45:57,740 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 14:45:57,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:45:57,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:45:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:58,101 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 15 treesize of output 7 [2021-08-06 14:45:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:58,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886457223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:58,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:58,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:45:58,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381858714] [2021-08-06 14:45:58,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:45:58,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:45:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:45:58,179 INFO L87 Difference]: Start difference. First operand 924 states and 3760 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:58,463 INFO L93 Difference]: Finished difference Result 1473 states and 5876 transitions. [2021-08-06 14:45:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:45:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:45:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:58,470 INFO L225 Difference]: With dead ends: 1473 [2021-08-06 14:45:58,470 INFO L226 Difference]: Without dead ends: 1455 [2021-08-06 14:45:58,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:45:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-06 14:45:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 954. [2021-08-06 14:45:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.092339979013641) internal successors, (3900), 953 states have internal predecessors, (3900), 0 states have call successors, (0), 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 14:45:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3900 transitions. [2021-08-06 14:45:58,505 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3900 transitions. Word has length 19 [2021-08-06 14:45:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:58,505 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3900 transitions. [2021-08-06 14:45:58,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:45:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3900 transitions. [2021-08-06 14:45:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:58,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:58,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:58,535 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 14:45:58,728 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,SelfDestructingSolverStorable13 [2021-08-06 14:45:58,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash 676260086, now seen corresponding path program 6 times [2021-08-06 14:45:58,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:58,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136393517] [2021-08-06 14:45:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:58,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:58,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136393517] [2021-08-06 14:45:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136393517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197517165] [2021-08-06 14:45:58,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:45:58,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:58,833 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 14:45:58,835 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 14:45:59,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:45:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:45:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:45:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:45:59,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:45:59,180 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 11 treesize of output 15 [2021-08-06 14:45:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197517165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:59,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:45:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:45:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004776244] [2021-08-06 14:45:59,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:45:59,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:45:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:45:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:45:59,342 INFO L87 Difference]: Start difference. First operand 954 states and 3900 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:45:59,472 INFO L93 Difference]: Finished difference Result 1199 states and 4849 transitions. [2021-08-06 14:45:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:45:59,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) Word has length 19 [2021-08-06 14:45:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:45:59,477 INFO L225 Difference]: With dead ends: 1199 [2021-08-06 14:45:59,477 INFO L226 Difference]: Without dead ends: 1188 [2021-08-06 14:45:59,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:45:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-08-06 14:45:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 958. [2021-08-06 14:45:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.091954022988506) internal successors, (3916), 957 states have internal predecessors, (3916), 0 states have call successors, (0), 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 14:45:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3916 transitions. [2021-08-06 14:45:59,508 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3916 transitions. Word has length 19 [2021-08-06 14:45:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:45:59,509 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 3916 transitions. [2021-08-06 14:45:59,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:45:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3916 transitions. [2021-08-06 14:45:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:45:59,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:45:59,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:45:59,536 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 14:45:59,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:59,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:45:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:45:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1214380458, now seen corresponding path program 1 times [2021-08-06 14:45:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:45:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689912723] [2021-08-06 14:45:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:59,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:45:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:45:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:45:59,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:45:59,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689912723] [2021-08-06 14:45:59,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689912723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:45:59,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880075757] [2021-08-06 14:45:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:45:59,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:45:59,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:45:59,817 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 14:45:59,820 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 14:46:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:00,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:00,302 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 11 treesize of output 7 [2021-08-06 14:46:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:00,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880075757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:00,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:00,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:00,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363429230] [2021-08-06 14:46:00,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:00,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:00,352 INFO L87 Difference]: Start difference. First operand 958 states and 3916 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:00,667 INFO L93 Difference]: Finished difference Result 1665 states and 6652 transitions. [2021-08-06 14:46:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:46:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:00,673 INFO L225 Difference]: With dead ends: 1665 [2021-08-06 14:46:00,674 INFO L226 Difference]: Without dead ends: 1647 [2021-08-06 14:46:00,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-06 14:46:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1005. [2021-08-06 14:46:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 4.114541832669323) internal successors, (4131), 1004 states have internal predecessors, (4131), 0 states have call successors, (0), 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 14:46:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 4131 transitions. [2021-08-06 14:46:00,707 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 4131 transitions. Word has length 19 [2021-08-06 14:46:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:00,707 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 4131 transitions. [2021-08-06 14:46:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 4131 transitions. [2021-08-06 14:46:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:00,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:00,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:00,733 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 14:46:00,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:46:00,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 883922358, now seen corresponding path program 1 times [2021-08-06 14:46:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:00,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852512242] [2021-08-06 14:46:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:00,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:00,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:00,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852512242] [2021-08-06 14:46:00,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852512242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:00,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226890452] [2021-08-06 14:46:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:01,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:01,000 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 14:46:01,002 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 14:46:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:01,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:01,461 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 11 treesize of output 7 [2021-08-06 14:46:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226890452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:01,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:01,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:01,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200588070] [2021-08-06 14:46:01,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:01,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:01,528 INFO L87 Difference]: Start difference. First operand 1005 states and 4131 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:01,815 INFO L93 Difference]: Finished difference Result 1782 states and 7130 transitions. [2021-08-06 14:46:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:46:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:01,822 INFO L225 Difference]: With dead ends: 1782 [2021-08-06 14:46:01,822 INFO L226 Difference]: Without dead ends: 1764 [2021-08-06 14:46:01,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-08-06 14:46:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1034. [2021-08-06 14:46:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.139399806389158) internal successors, (4276), 1033 states have internal predecessors, (4276), 0 states have call successors, (0), 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 14:46:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4276 transitions. [2021-08-06 14:46:01,854 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4276 transitions. Word has length 19 [2021-08-06 14:46:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:01,854 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4276 transitions. [2021-08-06 14:46:01,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4276 transitions. [2021-08-06 14:46:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:01,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:01,858 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:01,883 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 14:46:02,081 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,SelfDestructingSolverStorable16 [2021-08-06 14:46:02,081 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1685216246, now seen corresponding path program 2 times [2021-08-06 14:46:02,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:02,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261136235] [2021-08-06 14:46:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:02,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:02,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:02,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261136235] [2021-08-06 14:46:02,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261136235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:02,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709581729] [2021-08-06 14:46:02,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:02,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:02,186 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 14:46:02,202 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 14:46:02,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:02,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:46:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:02,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:02,621 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 11 treesize of output 15 [2021-08-06 14:46:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:02,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709581729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:02,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:02,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:02,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029001503] [2021-08-06 14:46:02,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:02,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:02,784 INFO L87 Difference]: Start difference. First operand 1034 states and 4276 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:02,871 INFO L93 Difference]: Finished difference Result 1189 states and 4867 transitions. [2021-08-06 14:46:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:02,876 INFO L225 Difference]: With dead ends: 1189 [2021-08-06 14:46:02,876 INFO L226 Difference]: Without dead ends: 1180 [2021-08-06 14:46:02,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:46:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-06 14:46:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1040. [2021-08-06 14:46:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 4.138594802694899) internal successors, (4300), 1039 states have internal predecessors, (4300), 0 states have call successors, (0), 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 14:46:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4300 transitions. [2021-08-06 14:46:02,903 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4300 transitions. Word has length 19 [2021-08-06 14:46:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:02,904 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 4300 transitions. [2021-08-06 14:46:02,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4300 transitions. [2021-08-06 14:46:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:02,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:02,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:02,933 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 14:46:03,132 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,SelfDestructingSolverStorable17 [2021-08-06 14:46:03,132 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash -192590060, now seen corresponding path program 3 times [2021-08-06 14:46:03,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:03,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022177320] [2021-08-06 14:46:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:03,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:03,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:03,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022177320] [2021-08-06 14:46:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022177320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:03,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878642397] [2021-08-06 14:46:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:03,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:03,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:03,218 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 14:46:03,218 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 14:46:03,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:46:03,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:46:03,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:03,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:03,670 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 11 treesize of output 15 [2021-08-06 14:46:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878642397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:03,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508467486] [2021-08-06 14:46:03,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:03,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:03,812 INFO L87 Difference]: Start difference. First operand 1040 states and 4300 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:03,904 INFO L93 Difference]: Finished difference Result 1187 states and 4863 transitions. [2021-08-06 14:46:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:03,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:03,910 INFO L225 Difference]: With dead ends: 1187 [2021-08-06 14:46:03,910 INFO L226 Difference]: Without dead ends: 1175 [2021-08-06 14:46:03,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:46:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-08-06 14:46:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1049. [2021-08-06 14:46:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 4.137404580152672) internal successors, (4336), 1048 states have internal predecessors, (4336), 0 states have call successors, (0), 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 14:46:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 4336 transitions. [2021-08-06 14:46:03,935 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 4336 transitions. Word has length 19 [2021-08-06 14:46:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:03,935 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 4336 transitions. [2021-08-06 14:46:03,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 4336 transitions. [2021-08-06 14:46:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:03,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:03,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:03,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:04,163 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1898931946, now seen corresponding path program 2 times [2021-08-06 14:46:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:04,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535299709] [2021-08-06 14:46:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:04,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:04,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535299709] [2021-08-06 14:46:04,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535299709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743311565] [2021-08-06 14:46:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:04,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:04,277 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 14:46:04,292 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 14:46:04,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:46:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:04,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:04,832 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 11 treesize of output 15 [2021-08-06 14:46:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743311565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:05,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:05,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156406039] [2021-08-06 14:46:05,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:05,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:05,004 INFO L87 Difference]: Start difference. First operand 1049 states and 4336 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:05,110 INFO L93 Difference]: Finished difference Result 1210 states and 4951 transitions. [2021-08-06 14:46:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:05,114 INFO L225 Difference]: With dead ends: 1210 [2021-08-06 14:46:05,114 INFO L226 Difference]: Without dead ends: 1201 [2021-08-06 14:46:05,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:46:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-08-06 14:46:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1057. [2021-08-06 14:46:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 4.136363636363637) internal successors, (4368), 1056 states have internal predecessors, (4368), 0 states have call successors, (0), 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 14:46:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4368 transitions. [2021-08-06 14:46:05,139 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4368 transitions. Word has length 19 [2021-08-06 14:46:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:05,139 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 4368 transitions. [2021-08-06 14:46:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4368 transitions. [2021-08-06 14:46:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:05,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:05,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:05,172 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 14:46:05,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:05,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -166615788, now seen corresponding path program 3 times [2021-08-06 14:46:05,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:05,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720429662] [2021-08-06 14:46:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:05,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:05,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:05,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720429662] [2021-08-06 14:46:05,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720429662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:05,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949264660] [2021-08-06 14:46:05,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:05,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:05,449 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 14:46:05,452 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 14:46:05,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:46:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:46:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:05,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:05,926 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 11 treesize of output 15 [2021-08-06 14:46:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:06,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949264660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:06,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:06,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:06,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642463512] [2021-08-06 14:46:06,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:06,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:06,093 INFO L87 Difference]: Start difference. First operand 1057 states and 4368 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:06,213 INFO L93 Difference]: Finished difference Result 1209 states and 4949 transitions. [2021-08-06 14:46:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:46:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:06,218 INFO L225 Difference]: With dead ends: 1209 [2021-08-06 14:46:06,218 INFO L226 Difference]: Without dead ends: 1197 [2021-08-06 14:46:06,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:46:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-08-06 14:46:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1061. [2021-08-06 14:46:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.1358490566037736) internal successors, (4384), 1060 states have internal predecessors, (4384), 0 states have call successors, (0), 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 14:46:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4384 transitions. [2021-08-06 14:46:06,244 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4384 transitions. Word has length 19 [2021-08-06 14:46:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:06,244 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 4384 transitions. [2021-08-06 14:46:06,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4384 transitions. [2021-08-06 14:46:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:06,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:06,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:06,272 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 14:46:06,460 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,SelfDestructingSolverStorable20 [2021-08-06 14:46:06,461 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1239505502, now seen corresponding path program 4 times [2021-08-06 14:46:06,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:06,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747708944] [2021-08-06 14:46:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:06,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:06,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:06,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747708944] [2021-08-06 14:46:06,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747708944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:06,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928814038] [2021-08-06 14:46:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:06,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:06,563 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 14:46:06,564 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 14:46:06,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:07,096 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 15 treesize of output 7 [2021-08-06 14:46:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928814038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:07,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:07,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:07,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309518580] [2021-08-06 14:46:07,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:07,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:07,172 INFO L87 Difference]: Start difference. First operand 1061 states and 4384 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:07,405 INFO L93 Difference]: Finished difference Result 1368 states and 5540 transitions. [2021-08-06 14:46:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:46:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:07,410 INFO L225 Difference]: With dead ends: 1368 [2021-08-06 14:46:07,410 INFO L226 Difference]: Without dead ends: 1346 [2021-08-06 14:46:07,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:46:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-08-06 14:46:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1071. [2021-08-06 14:46:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 4.132710280373832) internal successors, (4422), 1070 states have internal predecessors, (4422), 0 states have call successors, (0), 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 14:46:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 4422 transitions. [2021-08-06 14:46:07,437 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 4422 transitions. Word has length 19 [2021-08-06 14:46:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:07,437 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 4422 transitions. [2021-08-06 14:46:07,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 4422 transitions. [2021-08-06 14:46:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:07,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:07,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:07,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:07,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 14:46:07,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1177655488, now seen corresponding path program 5 times [2021-08-06 14:46:07,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:07,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464171461] [2021-08-06 14:46:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:07,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:07,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:07,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464171461] [2021-08-06 14:46:07,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464171461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:07,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703421878] [2021-08-06 14:46:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:46:07,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:07,745 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 14:46:07,745 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 14:46:08,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:46:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:08,263 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 15 treesize of output 7 [2021-08-06 14:46:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703421878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:08,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:08,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:08,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035198425] [2021-08-06 14:46:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:08,345 INFO L87 Difference]: Start difference. First operand 1071 states and 4422 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:08,574 INFO L93 Difference]: Finished difference Result 1366 states and 5541 transitions. [2021-08-06 14:46:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:46:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:08,578 INFO L225 Difference]: With dead ends: 1366 [2021-08-06 14:46:08,578 INFO L226 Difference]: Without dead ends: 1351 [2021-08-06 14:46:08,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:46:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-08-06 14:46:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1080. [2021-08-06 14:46:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 4.137164040778498) internal successors, (4464), 1079 states have internal predecessors, (4464), 0 states have call successors, (0), 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 14:46:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4464 transitions. [2021-08-06 14:46:08,605 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4464 transitions. Word has length 19 [2021-08-06 14:46:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:08,605 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 4464 transitions. [2021-08-06 14:46:08,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4464 transitions. [2021-08-06 14:46:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:08,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:08,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:08,635 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 14:46:08,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:08,821 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -430659694, now seen corresponding path program 6 times [2021-08-06 14:46:08,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:08,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944209380] [2021-08-06 14:46:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:08,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:08,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:08,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944209380] [2021-08-06 14:46:08,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944209380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:08,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048123521] [2021-08-06 14:46:08,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:46:08,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:08,928 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 14:46:08,928 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 14:46:09,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:46:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:46:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:09,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:09,443 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 13 treesize of output 17 [2021-08-06 14:46:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048123521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:09,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:09,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:46:09,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169033072] [2021-08-06 14:46:09,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:46:09,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:46:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:46:09,548 INFO L87 Difference]: Start difference. First operand 1080 states and 4464 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:46:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:09,763 INFO L93 Difference]: Finished difference Result 1366 states and 5546 transitions. [2021-08-06 14:46:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:46:09,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 19 [2021-08-06 14:46:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:09,766 INFO L225 Difference]: With dead ends: 1366 [2021-08-06 14:46:09,766 INFO L226 Difference]: Without dead ends: 1351 [2021-08-06 14:46:09,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:46:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-08-06 14:46:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1092. [2021-08-06 14:46:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 4.139321723189735) internal successors, (4516), 1091 states have internal predecessors, (4516), 0 states have call successors, (0), 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 14:46:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 4516 transitions. [2021-08-06 14:46:09,809 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 4516 transitions. Word has length 19 [2021-08-06 14:46:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 4516 transitions. [2021-08-06 14:46:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:46:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 4516 transitions. [2021-08-06 14:46:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:09,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:09,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:09,839 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 14:46:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:10,033 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1884927084, now seen corresponding path program 4 times [2021-08-06 14:46:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:10,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579909359] [2021-08-06 14:46:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:10,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:10,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:10,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579909359] [2021-08-06 14:46:10,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579909359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:10,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761383167] [2021-08-06 14:46:10,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:10,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:10,137 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 14:46:10,139 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 14:46:10,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:46:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:10,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:10,643 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 11 treesize of output 15 [2021-08-06 14:46:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:10,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761383167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:10,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:10,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 14:46:10,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213525445] [2021-08-06 14:46:10,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:46:10,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:46:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:46:10,809 INFO L87 Difference]: Start difference. First operand 1092 states and 4516 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 14:46:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:10,992 INFO L93 Difference]: Finished difference Result 1303 states and 5318 transitions. [2021-08-06 14:46:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:46:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 19 [2021-08-06 14:46:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:10,996 INFO L225 Difference]: With dead ends: 1303 [2021-08-06 14:46:10,996 INFO L226 Difference]: Without dead ends: 1279 [2021-08-06 14:46:10,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:46:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-08-06 14:46:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1105. [2021-08-06 14:46:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 4.134963768115942) internal successors, (4565), 1104 states have internal predecessors, (4565), 0 states have call successors, (0), 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 14:46:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4565 transitions. [2021-08-06 14:46:11,023 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4565 transitions. Word has length 19 [2021-08-06 14:46:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:11,024 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 4565 transitions. [2021-08-06 14:46:11,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 14:46:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4565 transitions. [2021-08-06 14:46:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:11,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:11,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:11,055 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 14:46:11,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 14:46:11,240 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash -152610926, now seen corresponding path program 5 times [2021-08-06 14:46:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:11,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057667549] [2021-08-06 14:46:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:11,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:11,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057667549] [2021-08-06 14:46:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057667549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:11,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321381618] [2021-08-06 14:46:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:46:11,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:11,331 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 14:46:11,332 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 14:46:11,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:46:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:46:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:11,874 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 15 treesize of output 7 [2021-08-06 14:46:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321381618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:11,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:11,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:11,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547700431] [2021-08-06 14:46:11,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:11,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:11,944 INFO L87 Difference]: Start difference. First operand 1105 states and 4565 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:12,155 INFO L93 Difference]: Finished difference Result 1433 states and 5804 transitions. [2021-08-06 14:46:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:46:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:12,158 INFO L225 Difference]: With dead ends: 1433 [2021-08-06 14:46:12,158 INFO L226 Difference]: Without dead ends: 1416 [2021-08-06 14:46:12,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:46:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-08-06 14:46:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1109. [2021-08-06 14:46:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 4.134476534296029) internal successors, (4581), 1108 states have internal predecessors, (4581), 0 states have call successors, (0), 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 14:46:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4581 transitions. [2021-08-06 14:46:12,183 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4581 transitions. Word has length 19 [2021-08-06 14:46:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:12,183 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 4581 transitions. [2021-08-06 14:46:12,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4581 transitions. [2021-08-06 14:46:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:46:12,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:12,186 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:12,217 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 14:46:12,404 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,SelfDestructingSolverStorable25 [2021-08-06 14:46:12,404 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572250, now seen corresponding path program 6 times [2021-08-06 14:46:12,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:12,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919247338] [2021-08-06 14:46:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:12,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:12,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:12,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919247338] [2021-08-06 14:46:12,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919247338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:12,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621964408] [2021-08-06 14:46:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:46:12,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:12,502 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 14:46:12,528 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 14:46:12,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:46:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:12,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:46:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:13,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:13,077 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 13 treesize of output 17 [2021-08-06 14:46:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:13,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621964408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:13,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:13,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:46:13,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557388331] [2021-08-06 14:46:13,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:46:13,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:46:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:13,203 INFO L87 Difference]: Start difference. First operand 1109 states and 4581 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:13,376 INFO L93 Difference]: Finished difference Result 1235 states and 5020 transitions. [2021-08-06 14:46:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:46:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 19 [2021-08-06 14:46:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:13,379 INFO L225 Difference]: With dead ends: 1235 [2021-08-06 14:46:13,379 INFO L226 Difference]: Without dead ends: 1218 [2021-08-06 14:46:13,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:46:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-08-06 14:46:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1107. [2021-08-06 14:46:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 4.125678119349005) internal successors, (4563), 1106 states have internal predecessors, (4563), 0 states have call successors, (0), 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 14:46:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 4563 transitions. [2021-08-06 14:46:13,401 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 4563 transitions. Word has length 19 [2021-08-06 14:46:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:13,401 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 4563 transitions. [2021-08-06 14:46:13,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 14:46:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 4563 transitions. [2021-08-06 14:46:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:46:13,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:13,404 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:13,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:13,616 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,SelfDestructingSolverStorable26 [2021-08-06 14:46:13,617 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2067340975, now seen corresponding path program 7 times [2021-08-06 14:46:13,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:13,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391205525] [2021-08-06 14:46:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:13,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:13,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:13,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391205525] [2021-08-06 14:46:13,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391205525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:13,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222898382] [2021-08-06 14:46:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:46:13,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:13,659 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 14:46:13,681 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 14:46:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:46:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:14,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222898382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:14,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:14,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-06 14:46:14,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544672857] [2021-08-06 14:46:14,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:46:14,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:46:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:46:14,236 INFO L87 Difference]: Start difference. First operand 1107 states and 4563 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 14:46:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:14,304 INFO L93 Difference]: Finished difference Result 2095 states and 8364 transitions. [2021-08-06 14:46:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:46:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 21 [2021-08-06 14:46:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:14,310 INFO L225 Difference]: With dead ends: 2095 [2021-08-06 14:46:14,311 INFO L226 Difference]: Without dead ends: 2033 [2021-08-06 14:46:14,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-08-06 14:46:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1653. [2021-08-06 14:46:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 4.135593220338983) internal successors, (6832), 1652 states have internal predecessors, (6832), 0 states have call successors, (0), 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 14:46:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6832 transitions. [2021-08-06 14:46:14,351 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6832 transitions. Word has length 21 [2021-08-06 14:46:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 6832 transitions. [2021-08-06 14:46:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 14:46:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6832 transitions. [2021-08-06 14:46:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:46:14,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:14,356 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:14,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:14,582 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,SelfDestructingSolverStorable27 [2021-08-06 14:46:14,583 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1150453651, now seen corresponding path program 8 times [2021-08-06 14:46:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:14,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913967321] [2021-08-06 14:46:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:14,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:14,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:14,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913967321] [2021-08-06 14:46:14,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913967321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:14,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128530420] [2021-08-06 14:46:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:14,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:14,625 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 14:46:14,628 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 14:46:15,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:46:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:15,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128530420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:46:15,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:46:15,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-08-06 14:46:15,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352093090] [2021-08-06 14:46:15,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:46:15,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:46:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:15,202 INFO L87 Difference]: Start difference. First operand 1653 states and 6832 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:15,235 INFO L93 Difference]: Finished difference Result 2494 states and 10133 transitions. [2021-08-06 14:46:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:46:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 14:46:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:15,242 INFO L225 Difference]: With dead ends: 2494 [2021-08-06 14:46:15,242 INFO L226 Difference]: Without dead ends: 2421 [2021-08-06 14:46:15,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-08-06 14:46:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1832. [2021-08-06 14:46:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 4.076460950300382) internal successors, (7464), 1831 states have internal predecessors, (7464), 0 states have call successors, (0), 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 14:46:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7464 transitions. [2021-08-06 14:46:15,281 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7464 transitions. Word has length 21 [2021-08-06 14:46:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:15,282 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 7464 transitions. [2021-08-06 14:46:15,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7464 transitions. [2021-08-06 14:46:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:46:15,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:15,287 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:15,324 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 14:46:15,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:46:15,505 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1018597773, now seen corresponding path program 9 times [2021-08-06 14:46:15,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:15,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765852783] [2021-08-06 14:46:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:15,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:46:15,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765852783] [2021-08-06 14:46:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765852783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136127577] [2021-08-06 14:46:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:15,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:15,533 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 14:46:15,558 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 14:46:16,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:46:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:46:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:16,149 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 14:46:16,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136127577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:16,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:16,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 14:46:16,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085730762] [2021-08-06 14:46:16,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:46:16,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:46:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:46:16,150 INFO L87 Difference]: Start difference. First operand 1832 states and 7464 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 14:46:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:16,260 INFO L93 Difference]: Finished difference Result 2883 states and 11509 transitions. [2021-08-06 14:46:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:46:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2021-08-06 14:46:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:16,271 INFO L225 Difference]: With dead ends: 2883 [2021-08-06 14:46:16,271 INFO L226 Difference]: Without dead ends: 2868 [2021-08-06 14:46:16,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:46:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-08-06 14:46:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2455. [2021-08-06 14:46:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2454 states have (on average 4.117359413202934) internal successors, (10104), 2454 states have internal predecessors, (10104), 0 states have call successors, (0), 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 14:46:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 10104 transitions. [2021-08-06 14:46:16,353 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 10104 transitions. Word has length 21 [2021-08-06 14:46:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:16,353 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 10104 transitions. [2021-08-06 14:46:16,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 14:46:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 10104 transitions. [2021-08-06 14:46:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:16,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:16,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:16,389 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 14:46:16,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:16,581 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash -430491024, now seen corresponding path program 10 times [2021-08-06 14:46:16,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:16,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531369541] [2021-08-06 14:46:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:16,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:16,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531369541] [2021-08-06 14:46:16,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531369541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561997366] [2021-08-06 14:46:16,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:16,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:16,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:16,810 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 14:46:16,811 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 14:46:17,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:17,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:17,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:46:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561997366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:17,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:17,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:17,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114824043] [2021-08-06 14:46:17,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:17,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:17,977 INFO L87 Difference]: Start difference. First operand 2455 states and 10104 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:18,774 INFO L93 Difference]: Finished difference Result 2785 states and 11399 transitions. [2021-08-06 14:46:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:46:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:18,782 INFO L225 Difference]: With dead ends: 2785 [2021-08-06 14:46:18,782 INFO L226 Difference]: Without dead ends: 2780 [2021-08-06 14:46:18,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:46:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-08-06 14:46:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2503. [2021-08-06 14:46:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 4.131494804156675) internal successors, (10337), 2502 states have internal predecessors, (10337), 0 states have call successors, (0), 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 14:46:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 10337 transitions. [2021-08-06 14:46:18,837 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 10337 transitions. Word has length 23 [2021-08-06 14:46:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 10337 transitions. [2021-08-06 14:46:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 10337 transitions. [2021-08-06 14:46:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:18,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:18,844 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:18,864 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 14:46:19,052 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,SelfDestructingSolverStorable30 [2021-08-06 14:46:19,052 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1828320050, now seen corresponding path program 11 times [2021-08-06 14:46:19,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:19,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508641232] [2021-08-06 14:46:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:19,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:19,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508641232] [2021-08-06 14:46:19,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508641232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185635723] [2021-08-06 14:46:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:46:19,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:19,102 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 14:46:19,105 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 14:46:19,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:46:19,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:19,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:46:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:19,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185635723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:19,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:19,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:46:19,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670429] [2021-08-06 14:46:19,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:46:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:46:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:46:19,766 INFO L87 Difference]: Start difference. First operand 2503 states and 10337 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:19,883 INFO L93 Difference]: Finished difference Result 4702 states and 18975 transitions. [2021-08-06 14:46:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:46:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:19,897 INFO L225 Difference]: With dead ends: 4702 [2021-08-06 14:46:19,897 INFO L226 Difference]: Without dead ends: 4377 [2021-08-06 14:46:19,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:46:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-08-06 14:46:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 2928. [2021-08-06 14:46:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 4.151349504612231) internal successors, (12151), 2927 states have internal predecessors, (12151), 0 states have call successors, (0), 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 14:46:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 12151 transitions. [2021-08-06 14:46:19,967 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 12151 transitions. Word has length 23 [2021-08-06 14:46:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 12151 transitions. [2021-08-06 14:46:19,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:46:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 12151 transitions. [2021-08-06 14:46:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:19,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:19,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:19,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 14:46:20,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:20,185 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash -565278928, now seen corresponding path program 12 times [2021-08-06 14:46:20,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:20,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676458843] [2021-08-06 14:46:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:20,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:20,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:20,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676458843] [2021-08-06 14:46:20,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676458843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:20,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699678022] [2021-08-06 14:46:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:46:20,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:20,472 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 14:46:20,473 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 14:46:21,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:46:21,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:21,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:21,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:46:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:21,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699678022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:21,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:21,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734578747] [2021-08-06 14:46:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:21,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:21,641 INFO L87 Difference]: Start difference. First operand 2928 states and 12151 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:22,588 INFO L93 Difference]: Finished difference Result 3442 states and 14185 transitions. [2021-08-06 14:46:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:46:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:22,597 INFO L225 Difference]: With dead ends: 3442 [2021-08-06 14:46:22,597 INFO L226 Difference]: Without dead ends: 3420 [2021-08-06 14:46:22,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:46:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-08-06 14:46:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2956. [2021-08-06 14:46:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 4.1553299492385785) internal successors, (12279), 2955 states have internal predecessors, (12279), 0 states have call successors, (0), 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 14:46:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 12279 transitions. [2021-08-06 14:46:22,666 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 12279 transitions. Word has length 23 [2021-08-06 14:46:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:22,666 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 12279 transitions. [2021-08-06 14:46:22,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 12279 transitions. [2021-08-06 14:46:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:22,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:22,674 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:22,703 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 14:46:22,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:22,898 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 20055024, now seen corresponding path program 13 times [2021-08-06 14:46:22,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:22,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882948358] [2021-08-06 14:46:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:22,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:23,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882948358] [2021-08-06 14:46:23,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882948358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631575449] [2021-08-06 14:46:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:46:23,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:23,169 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 14:46:23,194 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 14:46:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:23,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:24,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631575449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:24,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:24,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:24,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820130640] [2021-08-06 14:46:24,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:24,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:24,400 INFO L87 Difference]: Start difference. First operand 2956 states and 12279 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:25,450 INFO L93 Difference]: Finished difference Result 3366 states and 13867 transitions. [2021-08-06 14:46:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:46:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:25,458 INFO L225 Difference]: With dead ends: 3366 [2021-08-06 14:46:25,458 INFO L226 Difference]: Without dead ends: 3340 [2021-08-06 14:46:25,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:46:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-08-06 14:46:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2972. [2021-08-06 14:46:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 4.1544934365533495) internal successors, (12343), 2971 states have internal predecessors, (12343), 0 states have call successors, (0), 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 14:46:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 12343 transitions. [2021-08-06 14:46:25,536 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 12343 transitions. Word has length 23 [2021-08-06 14:46:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:25,537 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 12343 transitions. [2021-08-06 14:46:25,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 12343 transitions. [2021-08-06 14:46:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:25,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:25,544 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:25,570 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 14:46:25,763 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,SelfDestructingSolverStorable33 [2021-08-06 14:46:25,763 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1633621758, now seen corresponding path program 14 times [2021-08-06 14:46:25,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:25,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368056604] [2021-08-06 14:46:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:25,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:25,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:25,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368056604] [2021-08-06 14:46:25,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368056604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:25,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100171441] [2021-08-06 14:46:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:25,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:25,999 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 14:46:25,999 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 14:46:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:26,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:26,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100171441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:27,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:27,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101482920] [2021-08-06 14:46:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:27,214 INFO L87 Difference]: Start difference. First operand 2972 states and 12343 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:28,264 INFO L93 Difference]: Finished difference Result 3345 states and 13795 transitions. [2021-08-06 14:46:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:46:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:28,276 INFO L225 Difference]: With dead ends: 3345 [2021-08-06 14:46:28,276 INFO L226 Difference]: Without dead ends: 3324 [2021-08-06 14:46:28,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 790.9ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:46:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-08-06 14:46:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2968. [2021-08-06 14:46:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2967 states have (on average 4.154701718907988) internal successors, (12327), 2967 states have internal predecessors, (12327), 0 states have call successors, (0), 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 14:46:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 12327 transitions. [2021-08-06 14:46:28,327 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 12327 transitions. Word has length 23 [2021-08-06 14:46:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:28,327 INFO L470 AbstractCegarLoop]: Abstraction has 2968 states and 12327 transitions. [2021-08-06 14:46:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 12327 transitions. [2021-08-06 14:46:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:28,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:28,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:28,358 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 14:46:28,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 14:46:28,544 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash -410841410, now seen corresponding path program 15 times [2021-08-06 14:46:28,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:28,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073729803] [2021-08-06 14:46:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:28,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:28,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:28,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073729803] [2021-08-06 14:46:28,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073729803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:28,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597332896] [2021-08-06 14:46:28,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:28,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:28,758 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 14:46:28,758 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 14:46:29,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:46:29,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:46:29,743 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-06 14:46:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 48 [2021-08-06 14:46:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:29,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597332896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:29,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:29,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:46:29,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72409868] [2021-08-06 14:46:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:46:29,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:46:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:46:29,880 INFO L87 Difference]: Start difference. First operand 2968 states and 12327 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:46:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:30,601 INFO L93 Difference]: Finished difference Result 3301 states and 13614 transitions. [2021-08-06 14:46:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:46:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:30,609 INFO L225 Difference]: With dead ends: 3301 [2021-08-06 14:46:30,609 INFO L226 Difference]: Without dead ends: 3286 [2021-08-06 14:46:30,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:46:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-08-06 14:46:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2968. [2021-08-06 14:46:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2967 states have (on average 4.154701718907988) internal successors, (12327), 2967 states have internal predecessors, (12327), 0 states have call successors, (0), 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 14:46:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 12327 transitions. [2021-08-06 14:46:30,677 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 12327 transitions. Word has length 23 [2021-08-06 14:46:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:30,677 INFO L470 AbstractCegarLoop]: Abstraction has 2968 states and 12327 transitions. [2021-08-06 14:46:30,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:46:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 12327 transitions. [2021-08-06 14:46:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:30,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:30,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:30,713 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 14:46:30,908 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,SelfDestructingSolverStorable35 [2021-08-06 14:46:30,909 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash 778537524, now seen corresponding path program 16 times [2021-08-06 14:46:30,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:30,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141851293] [2021-08-06 14:46:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:30,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:31,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:31,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141851293] [2021-08-06 14:46:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141851293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:31,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282930906] [2021-08-06 14:46:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:31,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:31,105 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 14:46:31,106 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 14:46:31,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:31,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:31,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:32,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:32,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:46:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282930906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:32,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:32,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:32,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147984487] [2021-08-06 14:46:32,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:32,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:32,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:32,437 INFO L87 Difference]: Start difference. First operand 2968 states and 12327 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:33,261 INFO L93 Difference]: Finished difference Result 3751 states and 15373 transitions. [2021-08-06 14:46:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:46:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:33,270 INFO L225 Difference]: With dead ends: 3751 [2021-08-06 14:46:33,271 INFO L226 Difference]: Without dead ends: 3721 [2021-08-06 14:46:33,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:46:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-08-06 14:46:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3000. [2021-08-06 14:46:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 4.156052017339113) internal successors, (12464), 2999 states have internal predecessors, (12464), 0 states have call successors, (0), 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 14:46:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 12464 transitions. [2021-08-06 14:46:33,335 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 12464 transitions. Word has length 23 [2021-08-06 14:46:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 3000 states and 12464 transitions. [2021-08-06 14:46:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 12464 transitions. [2021-08-06 14:46:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:33,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:33,343 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:33,363 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 14:46:33,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:33,548 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash 859936580, now seen corresponding path program 17 times [2021-08-06 14:46:33,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:33,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311148213] [2021-08-06 14:46:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:33,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:33,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:33,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311148213] [2021-08-06 14:46:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311148213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:33,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429366326] [2021-08-06 14:46:33,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:46:33,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:33,745 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 14:46:33,767 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 14:46:34,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:46:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:34,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429366326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:35,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:35,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016052497] [2021-08-06 14:46:35,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:35,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:35,064 INFO L87 Difference]: Start difference. First operand 3000 states and 12464 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:35,929 INFO L93 Difference]: Finished difference Result 3568 states and 14660 transitions. [2021-08-06 14:46:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:46:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:35,938 INFO L225 Difference]: With dead ends: 3568 [2021-08-06 14:46:35,938 INFO L226 Difference]: Without dead ends: 3542 [2021-08-06 14:46:35,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 755.0ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:46:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2021-08-06 14:46:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3004. [2021-08-06 14:46:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 4.1558441558441555) internal successors, (12480), 3003 states have internal predecessors, (12480), 0 states have call successors, (0), 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 14:46:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 12480 transitions. [2021-08-06 14:46:35,990 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 12480 transitions. Word has length 23 [2021-08-06 14:46:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:35,990 INFO L470 AbstractCegarLoop]: Abstraction has 3004 states and 12480 transitions. [2021-08-06 14:46:35,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 12480 transitions. [2021-08-06 14:46:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:35,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:35,997 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:36,015 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 14:46:36,197 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,SelfDestructingSolverStorable37 [2021-08-06 14:46:36,197 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1821463982, now seen corresponding path program 18 times [2021-08-06 14:46:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:36,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553709774] [2021-08-06 14:46:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:36,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:36,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:36,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553709774] [2021-08-06 14:46:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553709774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438319127] [2021-08-06 14:46:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:46:36,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:36,392 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 14:46:36,392 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 14:46:37,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:46:37,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:37,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:37,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:37,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438319127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:37,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:37,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:37,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494616023] [2021-08-06 14:46:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:37,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:37,748 INFO L87 Difference]: Start difference. First operand 3004 states and 12480 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:38,524 INFO L93 Difference]: Finished difference Result 3551 states and 14611 transitions. [2021-08-06 14:46:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:46:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:38,533 INFO L225 Difference]: With dead ends: 3551 [2021-08-06 14:46:38,533 INFO L226 Difference]: Without dead ends: 3530 [2021-08-06 14:46:38,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:46:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-08-06 14:46:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3010. [2021-08-06 14:46:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 4.155533399800598) internal successors, (12504), 3009 states have internal predecessors, (12504), 0 states have call successors, (0), 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 14:46:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 12504 transitions. [2021-08-06 14:46:38,584 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 12504 transitions. Word has length 23 [2021-08-06 14:46:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:38,584 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 12504 transitions. [2021-08-06 14:46:38,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 12504 transitions. [2021-08-06 14:46:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:38,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:38,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:38,610 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 14:46:38,790 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,SelfDestructingSolverStorable38 [2021-08-06 14:46:38,790 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1498559152, now seen corresponding path program 19 times [2021-08-06 14:46:38,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:38,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850687139] [2021-08-06 14:46:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:38,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:39,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850687139] [2021-08-06 14:46:39,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850687139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928498407] [2021-08-06 14:46:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:46:39,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:39,039 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 14:46:39,041 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 14:46:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:40,163 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 14:46:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 52 [2021-08-06 14:46:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:40,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928498407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:40,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:40,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:46:40,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480649161] [2021-08-06 14:46:40,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:46:40,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:46:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:46:40,622 INFO L87 Difference]: Start difference. First operand 3010 states and 12504 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:46:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:41,680 INFO L93 Difference]: Finished difference Result 3431 states and 14141 transitions. [2021-08-06 14:46:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:46:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:41,689 INFO L225 Difference]: With dead ends: 3431 [2021-08-06 14:46:41,689 INFO L226 Difference]: Without dead ends: 3408 [2021-08-06 14:46:41,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:46:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-08-06 14:46:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3017. [2021-08-06 14:46:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 4.155172413793103) internal successors, (12532), 3016 states have internal predecessors, (12532), 0 states have call successors, (0), 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 14:46:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 12532 transitions. [2021-08-06 14:46:41,747 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 12532 transitions. Word has length 23 [2021-08-06 14:46:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:41,747 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 12532 transitions. [2021-08-06 14:46:41,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:46:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 12532 transitions. [2021-08-06 14:46:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:41,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:41,756 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:41,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:41,959 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,SelfDestructingSolverStorable39 [2021-08-06 14:46:41,959 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash -612794448, now seen corresponding path program 20 times [2021-08-06 14:46:41,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:41,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191050209] [2021-08-06 14:46:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:41,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:42,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:42,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191050209] [2021-08-06 14:46:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191050209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:42,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649998071] [2021-08-06 14:46:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:42,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:42,229 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 14:46:42,230 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 14:46:43,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:46:43,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:43,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:43,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:46:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:43,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649998071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:43,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:43,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:43,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775855895] [2021-08-06 14:46:43,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:43,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:43,593 INFO L87 Difference]: Start difference. First operand 3017 states and 12532 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:44,347 INFO L93 Difference]: Finished difference Result 3589 states and 14786 transitions. [2021-08-06 14:46:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:46:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:44,356 INFO L225 Difference]: With dead ends: 3589 [2021-08-06 14:46:44,356 INFO L226 Difference]: Without dead ends: 3567 [2021-08-06 14:46:44,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:46:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-08-06 14:46:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3033. [2021-08-06 14:46:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3032 states have (on average 4.1569920844327175) internal successors, (12604), 3032 states have internal predecessors, (12604), 0 states have call successors, (0), 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 14:46:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 12604 transitions. [2021-08-06 14:46:44,408 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 12604 transitions. Word has length 23 [2021-08-06 14:46:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:44,408 INFO L470 AbstractCegarLoop]: Abstraction has 3033 states and 12604 transitions. [2021-08-06 14:46:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 12604 transitions. [2021-08-06 14:46:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:44,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:44,414 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:44,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:44,615 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,SelfDestructingSolverStorable40 [2021-08-06 14:46:44,615 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -27460496, now seen corresponding path program 21 times [2021-08-06 14:46:44,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:44,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343710388] [2021-08-06 14:46:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:44,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:44,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:44,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343710388] [2021-08-06 14:46:44,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343710388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:44,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996412412] [2021-08-06 14:46:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:46:44,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:44,856 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 14:46:44,856 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 14:46:45,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:46:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:45,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:46,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996412412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:46,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:46,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336364168] [2021-08-06 14:46:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:46,277 INFO L87 Difference]: Start difference. First operand 3033 states and 12604 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:47,238 INFO L93 Difference]: Finished difference Result 3438 states and 14170 transitions. [2021-08-06 14:46:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:46:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:47,246 INFO L225 Difference]: With dead ends: 3438 [2021-08-06 14:46:47,247 INFO L226 Difference]: Without dead ends: 3412 [2021-08-06 14:46:47,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 734.7ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:46:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-08-06 14:46:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3037. [2021-08-06 14:46:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 4.156785243741766) internal successors, (12620), 3036 states have internal predecessors, (12620), 0 states have call successors, (0), 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 14:46:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 12620 transitions. [2021-08-06 14:46:47,316 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 12620 transitions. Word has length 23 [2021-08-06 14:46:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:47,317 INFO L470 AbstractCegarLoop]: Abstraction has 3037 states and 12620 transitions. [2021-08-06 14:46:47,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 12620 transitions. [2021-08-06 14:46:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:47,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:47,324 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:47,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:47,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:47,542 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:47,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1586106238, now seen corresponding path program 22 times [2021-08-06 14:46:47,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:47,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969222518] [2021-08-06 14:46:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:47,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:47,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:47,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969222518] [2021-08-06 14:46:47,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969222518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:47,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720802261] [2021-08-06 14:46:47,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:46:47,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:47,813 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 14:46:47,814 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 14:46:48,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:46:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:48,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:48,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:48,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:49,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720802261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:49,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:49,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471765221] [2021-08-06 14:46:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:49,353 INFO L87 Difference]: Start difference. First operand 3037 states and 12620 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:50,249 INFO L93 Difference]: Finished difference Result 3463 states and 14276 transitions. [2021-08-06 14:46:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:46:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:50,257 INFO L225 Difference]: With dead ends: 3463 [2021-08-06 14:46:50,258 INFO L226 Difference]: Without dead ends: 3442 [2021-08-06 14:46:50,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:46:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-08-06 14:46:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3029. [2021-08-06 14:46:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 4.156538969616909) internal successors, (12586), 3028 states have internal predecessors, (12586), 0 states have call successors, (0), 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 14:46:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 12586 transitions. [2021-08-06 14:46:50,320 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 12586 transitions. Word has length 23 [2021-08-06 14:46:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:50,321 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 12586 transitions. [2021-08-06 14:46:50,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 12586 transitions. [2021-08-06 14:46:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:50,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:50,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:50,359 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 14:46:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:50,541 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash -263297070, now seen corresponding path program 23 times [2021-08-06 14:46:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:50,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679520389] [2021-08-06 14:46:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:50,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:50,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:50,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679520389] [2021-08-06 14:46:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679520389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:50,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497809] [2021-08-06 14:46:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:46:50,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:50,717 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 14:46:50,740 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 14:46:51,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:46:51,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:51,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:51,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:46:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:52,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:52,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:52,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392733537] [2021-08-06 14:46:52,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:52,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:52,259 INFO L87 Difference]: Start difference. First operand 3029 states and 12586 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:53,086 INFO L93 Difference]: Finished difference Result 3816 states and 15661 transitions. [2021-08-06 14:46:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:46:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:53,095 INFO L225 Difference]: With dead ends: 3816 [2021-08-06 14:46:53,095 INFO L226 Difference]: Without dead ends: 3786 [2021-08-06 14:46:53,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:46:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-08-06 14:46:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3033. [2021-08-06 14:46:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3032 states have (on average 4.1569920844327175) internal successors, (12604), 3032 states have internal predecessors, (12604), 0 states have call successors, (0), 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 14:46:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 12604 transitions. [2021-08-06 14:46:53,145 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 12604 transitions. Word has length 23 [2021-08-06 14:46:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:53,145 INFO L470 AbstractCegarLoop]: Abstraction has 3033 states and 12604 transitions. [2021-08-06 14:46:53,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 12604 transitions. [2021-08-06 14:46:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:53,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:53,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:53,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 14:46:53,350 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,SelfDestructingSolverStorable43 [2021-08-06 14:46:53,351 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -181898014, now seen corresponding path program 24 times [2021-08-06 14:46:53,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:53,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208099113] [2021-08-06 14:46:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:53,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:53,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:53,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208099113] [2021-08-06 14:46:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208099113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:53,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796757112] [2021-08-06 14:46:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:46:53,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:53,527 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 14:46:53,528 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 14:46:54,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:46:54,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:46:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:54,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:55,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796757112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:55,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:55,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:55,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019287297] [2021-08-06 14:46:55,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:55,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:55,058 INFO L87 Difference]: Start difference. First operand 3033 states and 12604 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:55,884 INFO L93 Difference]: Finished difference Result 3584 states and 14745 transitions. [2021-08-06 14:46:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:46:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:55,892 INFO L225 Difference]: With dead ends: 3584 [2021-08-06 14:46:55,892 INFO L226 Difference]: Without dead ends: 3558 [2021-08-06 14:46:55,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:46:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-08-06 14:46:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3037. [2021-08-06 14:46:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 4.156785243741766) internal successors, (12620), 3036 states have internal predecessors, (12620), 0 states have call successors, (0), 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 14:46:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 12620 transitions. [2021-08-06 14:46:55,982 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 12620 transitions. Word has length 23 [2021-08-06 14:46:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:55,982 INFO L470 AbstractCegarLoop]: Abstraction has 3037 states and 12620 transitions. [2021-08-06 14:46:55,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 12620 transitions. [2021-08-06 14:46:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:55,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:55,988 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:56,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 14:46:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 14:46:56,188 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1431668720, now seen corresponding path program 25 times [2021-08-06 14:46:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:56,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042949684] [2021-08-06 14:46:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:56,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:56,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:56,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042949684] [2021-08-06 14:46:56,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042949684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:56,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890770128] [2021-08-06 14:46:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:46:56,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:56,375 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 14:46:56,375 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 14:46:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:46:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:46:57,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:46:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:46:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:57,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890770128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:57,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:46:57,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:46:57,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814558482] [2021-08-06 14:46:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:46:57,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:46:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:46:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:46:57,983 INFO L87 Difference]: Start difference. First operand 3037 states and 12620 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:46:58,853 INFO L93 Difference]: Finished difference Result 3620 states and 14901 transitions. [2021-08-06 14:46:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:46:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:46:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:46:58,861 INFO L225 Difference]: With dead ends: 3620 [2021-08-06 14:46:58,862 INFO L226 Difference]: Without dead ends: 3599 [2021-08-06 14:46:58,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 639.7ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:46:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2021-08-06 14:46:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3025. [2021-08-06 14:46:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 4.15542328042328) internal successors, (12566), 3024 states have internal predecessors, (12566), 0 states have call successors, (0), 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 14:46:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 12566 transitions. [2021-08-06 14:46:58,931 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 12566 transitions. Word has length 23 [2021-08-06 14:46:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:46:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 12566 transitions. [2021-08-06 14:46:58,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:46:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 12566 transitions. [2021-08-06 14:46:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:46:58,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:46:58,938 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:46:58,962 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 14:46:59,153 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,SelfDestructingSolverStorable45 [2021-08-06 14:46:59,153 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:46:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:46:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash -487844624, now seen corresponding path program 26 times [2021-08-06 14:46:59,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:46:59,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138391311] [2021-08-06 14:46:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:46:59,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:46:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:46:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:46:59,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:46:59,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138391311] [2021-08-06 14:46:59,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138391311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:46:59,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938282093] [2021-08-06 14:46:59,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:46:59,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:46:59,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:46:59,357 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 14:46:59,358 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 14:47:00,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:00,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:47:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:01,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938282093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:01,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:01,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:01,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114163031] [2021-08-06 14:47:01,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:01,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:01,051 INFO L87 Difference]: Start difference. First operand 3025 states and 12566 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:01,579 INFO L93 Difference]: Finished difference Result 3454 states and 14242 transitions. [2021-08-06 14:47:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:47:01,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:01,588 INFO L225 Difference]: With dead ends: 3454 [2021-08-06 14:47:01,588 INFO L226 Difference]: Without dead ends: 3420 [2021-08-06 14:47:01,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:47:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-08-06 14:47:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 3040. [2021-08-06 14:47:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3039 states have (on average 4.154327081276736) internal successors, (12625), 3039 states have internal predecessors, (12625), 0 states have call successors, (0), 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 14:47:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 12625 transitions. [2021-08-06 14:47:01,638 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 12625 transitions. Word has length 23 [2021-08-06 14:47:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:01,638 INFO L470 AbstractCegarLoop]: Abstraction has 3040 states and 12625 transitions. [2021-08-06 14:47:01,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 12625 transitions. [2021-08-06 14:47:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:01,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:01,643 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:01,664 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 14:47:01,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:01,844 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash -333407106, now seen corresponding path program 27 times [2021-08-06 14:47:01,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:01,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619018134] [2021-08-06 14:47:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:01,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:02,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:02,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619018134] [2021-08-06 14:47:02,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619018134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:02,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543732695] [2021-08-06 14:47:02,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:02,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:02,007 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 14:47:02,007 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 14:47:03,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:03,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:03,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:47:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:03,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543732695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:03,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319337944] [2021-08-06 14:47:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:03,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:03,669 INFO L87 Difference]: Start difference. First operand 3040 states and 12625 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:04,371 INFO L93 Difference]: Finished difference Result 3618 states and 14876 transitions. [2021-08-06 14:47:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:47:04,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:04,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:04,381 INFO L225 Difference]: With dead ends: 3618 [2021-08-06 14:47:04,381 INFO L226 Difference]: Without dead ends: 3588 [2021-08-06 14:47:04,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:47:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2021-08-06 14:47:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3044. [2021-08-06 14:47:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 4.154781465658889) internal successors, (12643), 3043 states have internal predecessors, (12643), 0 states have call successors, (0), 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 14:47:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 12643 transitions. [2021-08-06 14:47:04,451 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 12643 transitions. Word has length 23 [2021-08-06 14:47:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:04,451 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 12643 transitions. [2021-08-06 14:47:04,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 12643 transitions. [2021-08-06 14:47:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:04,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:04,458 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:04,489 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 14:47:04,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 14:47:04,673 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:04,673 INFO L82 PathProgramCache]: Analyzing trace with hash -252008050, now seen corresponding path program 28 times [2021-08-06 14:47:04,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:04,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845631035] [2021-08-06 14:47:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:04,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:04,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845631035] [2021-08-06 14:47:04,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845631035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:04,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735411753] [2021-08-06 14:47:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:04,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:04,850 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 14:47:04,851 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 14:47:05,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:06,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735411753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:06,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:06,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:06,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742715912] [2021-08-06 14:47:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:06,552 INFO L87 Difference]: Start difference. First operand 3044 states and 12643 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:07,285 INFO L93 Difference]: Finished difference Result 3470 states and 14291 transitions. [2021-08-06 14:47:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:47:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:07,293 INFO L225 Difference]: With dead ends: 3470 [2021-08-06 14:47:07,293 INFO L226 Difference]: Without dead ends: 3444 [2021-08-06 14:47:07,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:47:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-08-06 14:47:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3048. [2021-08-06 14:47:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 4.154578273711848) internal successors, (12659), 3047 states have internal predecessors, (12659), 0 states have call successors, (0), 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 14:47:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 12659 transitions. [2021-08-06 14:47:07,341 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 12659 transitions. Word has length 23 [2021-08-06 14:47:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:07,341 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 12659 transitions. [2021-08-06 14:47:07,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 12659 transitions. [2021-08-06 14:47:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:07,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:07,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:07,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 14:47:07,546 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,SelfDestructingSolverStorable48 [2021-08-06 14:47:07,546 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1361558684, now seen corresponding path program 29 times [2021-08-06 14:47:07,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:07,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205834579] [2021-08-06 14:47:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:07,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:07,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:07,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205834579] [2021-08-06 14:47:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205834579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:07,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647451987] [2021-08-06 14:47:07,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:07,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:07,734 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 14:47:07,758 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 14:47:08,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:47:08,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:09,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:09,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647451987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:09,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:09,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:09,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229962864] [2021-08-06 14:47:09,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:09,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:09,475 INFO L87 Difference]: Start difference. First operand 3048 states and 12659 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:10,346 INFO L93 Difference]: Finished difference Result 3526 states and 14526 transitions. [2021-08-06 14:47:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:47:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:10,355 INFO L225 Difference]: With dead ends: 3526 [2021-08-06 14:47:10,355 INFO L226 Difference]: Without dead ends: 3505 [2021-08-06 14:47:10,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:47:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-08-06 14:47:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 3040. [2021-08-06 14:47:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3039 states have (on average 4.154327081276736) internal successors, (12625), 3039 states have internal predecessors, (12625), 0 states have call successors, (0), 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 14:47:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 12625 transitions. [2021-08-06 14:47:10,411 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 12625 transitions. Word has length 23 [2021-08-06 14:47:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:10,412 INFO L470 AbstractCegarLoop]: Abstraction has 3040 states and 12625 transitions. [2021-08-06 14:47:10,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 12625 transitions. [2021-08-06 14:47:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:10,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:10,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:10,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:10,618 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,SelfDestructingSolverStorable49 [2021-08-06 14:47:10,618 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1772772286, now seen corresponding path program 30 times [2021-08-06 14:47:10,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:10,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327123390] [2021-08-06 14:47:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:10,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:10,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:10,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327123390] [2021-08-06 14:47:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327123390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:10,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032849082] [2021-08-06 14:47:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:10,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:10,864 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 14:47:10,865 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 14:47:12,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:47:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:12,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:47:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032849082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:12,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:12,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:12,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454711134] [2021-08-06 14:47:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:12,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:12,584 INFO L87 Difference]: Start difference. First operand 3040 states and 12625 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:13,325 INFO L93 Difference]: Finished difference Result 3582 states and 14759 transitions. [2021-08-06 14:47:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:47:13,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:13,334 INFO L225 Difference]: With dead ends: 3582 [2021-08-06 14:47:13,334 INFO L226 Difference]: Without dead ends: 3560 [2021-08-06 14:47:13,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:47:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-08-06 14:47:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 3052. [2021-08-06 14:47:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 4.156342182890856) internal successors, (12681), 3051 states have internal predecessors, (12681), 0 states have call successors, (0), 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 14:47:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 12681 transitions. [2021-08-06 14:47:13,413 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 12681 transitions. Word has length 23 [2021-08-06 14:47:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:13,413 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 12681 transitions. [2021-08-06 14:47:13,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 12681 transitions. [2021-08-06 14:47:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:13,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:13,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:13,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 14:47:13,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-06 14:47:13,620 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1936861058, now seen corresponding path program 31 times [2021-08-06 14:47:13,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:13,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027749702] [2021-08-06 14:47:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:13,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:13,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027749702] [2021-08-06 14:47:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027749702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379008439] [2021-08-06 14:47:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:13,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:13,879 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:13,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:47:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:15,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:15,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:15,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379008439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:15,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:15,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:15,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186680318] [2021-08-06 14:47:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:15,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:15,726 INFO L87 Difference]: Start difference. First operand 3052 states and 12681 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:16,577 INFO L93 Difference]: Finished difference Result 3528 states and 14529 transitions. [2021-08-06 14:47:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:47:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:16,586 INFO L225 Difference]: With dead ends: 3528 [2021-08-06 14:47:16,586 INFO L226 Difference]: Without dead ends: 3502 [2021-08-06 14:47:16,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 765.0ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:47:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-08-06 14:47:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3056. [2021-08-06 14:47:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 4.1561374795417345) internal successors, (12697), 3055 states have internal predecessors, (12697), 0 states have call successors, (0), 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 14:47:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 12697 transitions. [2021-08-06 14:47:16,638 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 12697 transitions. Word has length 23 [2021-08-06 14:47:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:16,638 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 12697 transitions. [2021-08-06 14:47:16,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 12697 transitions. [2021-08-06 14:47:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:16,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:16,643 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:16,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 14:47:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:16,844 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash -323294324, now seen corresponding path program 32 times [2021-08-06 14:47:16,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:16,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283238417] [2021-08-06 14:47:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:16,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:17,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:17,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283238417] [2021-08-06 14:47:17,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283238417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:17,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7368148] [2021-08-06 14:47:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:17,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:17,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:17,135 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:17,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:47:18,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:18,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:18,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:18,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:18,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7368148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:18,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:18,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:18,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314351647] [2021-08-06 14:47:18,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:18,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:18,986 INFO L87 Difference]: Start difference. First operand 3056 states and 12697 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:19,802 INFO L93 Difference]: Finished difference Result 3448 states and 14217 transitions. [2021-08-06 14:47:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:47:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:19,811 INFO L225 Difference]: With dead ends: 3448 [2021-08-06 14:47:19,812 INFO L226 Difference]: Without dead ends: 3427 [2021-08-06 14:47:19,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:47:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-08-06 14:47:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3048. [2021-08-06 14:47:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 4.155891040367575) internal successors, (12663), 3047 states have internal predecessors, (12663), 0 states have call successors, (0), 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 14:47:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 12663 transitions. [2021-08-06 14:47:19,866 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 12663 transitions. Word has length 23 [2021-08-06 14:47:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:19,866 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 12663 transitions. [2021-08-06 14:47:19,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 12663 transitions. [2021-08-06 14:47:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:19,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:19,872 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:19,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 14:47:20,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 14:47:20,073 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2122269664, now seen corresponding path program 33 times [2021-08-06 14:47:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511949485] [2021-08-06 14:47:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:20,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:20,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:20,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511949485] [2021-08-06 14:47:20,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511949485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:20,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255792018] [2021-08-06 14:47:20,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:20,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:20,242 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:20,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:47:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:47:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:47:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:21,797 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 14:47:21,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 56 [2021-08-06 14:47:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:21,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255792018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:21,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:21,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:47:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258129365] [2021-08-06 14:47:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:47:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:47:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:47:21,982 INFO L87 Difference]: Start difference. First operand 3048 states and 12663 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) 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 14:47:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:22,623 INFO L93 Difference]: Finished difference Result 4263 states and 17445 transitions. [2021-08-06 14:47:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:47:22,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) 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 23 [2021-08-06 14:47:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:22,634 INFO L225 Difference]: With dead ends: 4263 [2021-08-06 14:47:22,635 INFO L226 Difference]: Without dead ends: 4201 [2021-08-06 14:47:22,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:47:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-08-06 14:47:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3092. [2021-08-06 14:47:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3092 states, 3091 states have (on average 4.161759948236816) internal successors, (12864), 3091 states have internal predecessors, (12864), 0 states have call successors, (0), 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 14:47:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3092 states to 3092 states and 12864 transitions. [2021-08-06 14:47:22,702 INFO L78 Accepts]: Start accepts. Automaton has 3092 states and 12864 transitions. Word has length 23 [2021-08-06 14:47:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:22,702 INFO L470 AbstractCegarLoop]: Abstraction has 3092 states and 12864 transitions. [2021-08-06 14:47:22,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) 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 14:47:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3092 states and 12864 transitions. [2021-08-06 14:47:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:22,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:22,708 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:22,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:22,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:22,924 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1607113522, now seen corresponding path program 34 times [2021-08-06 14:47:22,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:22,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185275229] [2021-08-06 14:47:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:22,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:23,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:23,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185275229] [2021-08-06 14:47:23,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185275229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:23,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078983709] [2021-08-06 14:47:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:23,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:23,185 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:23,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:47:24,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:24,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:24,981 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 14:47:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 74 [2021-08-06 14:47:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078983709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:25,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:25,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:47:25,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966675440] [2021-08-06 14:47:25,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:47:25,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:47:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:25,365 INFO L87 Difference]: Start difference. First operand 3092 states and 12864 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:26,770 INFO L93 Difference]: Finished difference Result 3684 states and 15172 transitions. [2021-08-06 14:47:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:47:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:26,780 INFO L225 Difference]: With dead ends: 3684 [2021-08-06 14:47:26,780 INFO L226 Difference]: Without dead ends: 3662 [2021-08-06 14:47:26,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1094.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:47:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-08-06 14:47:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3100. [2021-08-06 14:47:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3099 states have (on average 4.161987737979993) internal successors, (12898), 3099 states have internal predecessors, (12898), 0 states have call successors, (0), 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 14:47:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 12898 transitions. [2021-08-06 14:47:26,838 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 12898 transitions. Word has length 23 [2021-08-06 14:47:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:26,838 INFO L470 AbstractCegarLoop]: Abstraction has 3100 states and 12898 transitions. [2021-08-06 14:47:26,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 12898 transitions. [2021-08-06 14:47:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:26,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:26,845 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:26,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:27,045 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1021779570, now seen corresponding path program 35 times [2021-08-06 14:47:27,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:27,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850266179] [2021-08-06 14:47:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:27,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:27,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:27,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850266179] [2021-08-06 14:47:27,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850266179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:27,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079788961] [2021-08-06 14:47:27,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:27,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:27,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:27,278 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:27,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:47:28,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:47:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:28,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:28,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079788961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:29,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:29,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:29,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427913511] [2021-08-06 14:47:29,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:29,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:29,261 INFO L87 Difference]: Start difference. First operand 3100 states and 12898 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:30,085 INFO L93 Difference]: Finished difference Result 3509 states and 14471 transitions. [2021-08-06 14:47:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:47:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:30,094 INFO L225 Difference]: With dead ends: 3509 [2021-08-06 14:47:30,094 INFO L226 Difference]: Without dead ends: 3483 [2021-08-06 14:47:30,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:47:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-08-06 14:47:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3104. [2021-08-06 14:47:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 4.161778923622301) internal successors, (12914), 3103 states have internal predecessors, (12914), 0 states have call successors, (0), 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 14:47:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 12914 transitions. [2021-08-06 14:47:30,168 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 12914 transitions. Word has length 23 [2021-08-06 14:47:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:30,168 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 12914 transitions. [2021-08-06 14:47:30,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 12914 transitions. [2021-08-06 14:47:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:30,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:30,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:30,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:30,378 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 591787164, now seen corresponding path program 36 times [2021-08-06 14:47:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:30,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458328299] [2021-08-06 14:47:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:30,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:30,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:30,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458328299] [2021-08-06 14:47:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458328299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:30,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960766690] [2021-08-06 14:47:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:30,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:30,613 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:30,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:47:32,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:47:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:32,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:32,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960766690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:32,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:32,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:32,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283703821] [2021-08-06 14:47:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:32,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:32,634 INFO L87 Difference]: Start difference. First operand 3104 states and 12914 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:33,267 INFO L93 Difference]: Finished difference Result 3421 states and 14132 transitions. [2021-08-06 14:47:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:47:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:33,277 INFO L225 Difference]: With dead ends: 3421 [2021-08-06 14:47:33,277 INFO L226 Difference]: Without dead ends: 3400 [2021-08-06 14:47:33,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:47:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-08-06 14:47:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3096. [2021-08-06 14:47:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 4.161550888529887) internal successors, (12880), 3095 states have internal predecessors, (12880), 0 states have call successors, (0), 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 14:47:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 12880 transitions. [2021-08-06 14:47:33,340 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 12880 transitions. Word has length 23 [2021-08-06 14:47:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:33,340 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 12880 transitions. [2021-08-06 14:47:33,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 12880 transitions. [2021-08-06 14:47:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:33,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:33,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:33,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:33,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:33,565 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1452676004, now seen corresponding path program 37 times [2021-08-06 14:47:33,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:33,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911712007] [2021-08-06 14:47:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:33,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:33,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:33,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911712007] [2021-08-06 14:47:33,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911712007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:33,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241296550] [2021-08-06 14:47:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:33,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:33,789 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:33,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:47:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:35,664 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 14:47:35,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 74 [2021-08-06 14:47:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241296550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:36,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:36,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:47:36,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85213686] [2021-08-06 14:47:36,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:47:36,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:47:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:36,095 INFO L87 Difference]: Start difference. First operand 3096 states and 12880 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:37,434 INFO L93 Difference]: Finished difference Result 3616 states and 14911 transitions. [2021-08-06 14:47:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:47:37,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:37,443 INFO L225 Difference]: With dead ends: 3616 [2021-08-06 14:47:37,444 INFO L226 Difference]: Without dead ends: 3593 [2021-08-06 14:47:37,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1006.2ms TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:47:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-08-06 14:47:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3092. [2021-08-06 14:47:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3092 states, 3091 states have (on average 4.161759948236816) internal successors, (12864), 3091 states have internal predecessors, (12864), 0 states have call successors, (0), 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 14:47:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3092 states to 3092 states and 12864 transitions. [2021-08-06 14:47:37,530 INFO L78 Accepts]: Start accepts. Automaton has 3092 states and 12864 transitions. Word has length 23 [2021-08-06 14:47:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:37,530 INFO L470 AbstractCegarLoop]: Abstraction has 3092 states and 12864 transitions. [2021-08-06 14:47:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3092 states and 12864 transitions. [2021-08-06 14:47:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:37,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:37,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:37,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 14:47:37,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-06 14:47:37,738 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1445095954, now seen corresponding path program 38 times [2021-08-06 14:47:37,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:37,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261709370] [2021-08-06 14:47:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:37,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:37,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:37,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261709370] [2021-08-06 14:47:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261709370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:37,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454326161] [2021-08-06 14:47:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:37,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:37,966 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:47:39,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:47:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:39,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:47:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454326161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:40,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:40,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:40,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754382727] [2021-08-06 14:47:40,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:40,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:40,022 INFO L87 Difference]: Start difference. First operand 3092 states and 12864 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:41,059 INFO L93 Difference]: Finished difference Result 3767 states and 15512 transitions. [2021-08-06 14:47:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:47:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:41,069 INFO L225 Difference]: With dead ends: 3767 [2021-08-06 14:47:41,069 INFO L226 Difference]: Without dead ends: 3745 [2021-08-06 14:47:41,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:47:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-08-06 14:47:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3106. [2021-08-06 14:47:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 4.164573268921095) internal successors, (12931), 3105 states have internal predecessors, (12931), 0 states have call successors, (0), 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 14:47:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 12931 transitions. [2021-08-06 14:47:41,132 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 12931 transitions. Word has length 23 [2021-08-06 14:47:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:41,132 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 12931 transitions. [2021-08-06 14:47:41,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 12931 transitions. [2021-08-06 14:47:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:41,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:41,138 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:41,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 14:47:41,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 14:47:41,339 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2030429906, now seen corresponding path program 39 times [2021-08-06 14:47:41,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:41,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123030462] [2021-08-06 14:47:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:41,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:41,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:41,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123030462] [2021-08-06 14:47:41,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123030462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:41,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407567331] [2021-08-06 14:47:41,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:47:41,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:41,630 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:41,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:47:43,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:47:43,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:47:43,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:43,387 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-08-06 14:47:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-08-06 14:47:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:43,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407567331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:43,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:43,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:47:43,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767439490] [2021-08-06 14:47:43,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:47:43,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:47:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:47:43,788 INFO L87 Difference]: Start difference. First operand 3106 states and 12931 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:45,303 INFO L93 Difference]: Finished difference Result 3911 states and 16055 transitions. [2021-08-06 14:47:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:47:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:45,313 INFO L225 Difference]: With dead ends: 3911 [2021-08-06 14:47:45,313 INFO L226 Difference]: Without dead ends: 3885 [2021-08-06 14:47:45,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1295.7ms TimeCoverageRelationStatistics Valid=367, Invalid=1703, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 14:47:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-08-06 14:47:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3114. [2021-08-06 14:47:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3113 states have (on average 4.164792804368776) internal successors, (12965), 3113 states have internal predecessors, (12965), 0 states have call successors, (0), 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 14:47:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 12965 transitions. [2021-08-06 14:47:45,374 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 12965 transitions. Word has length 23 [2021-08-06 14:47:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 3114 states and 12965 transitions. [2021-08-06 14:47:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:47:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 12965 transitions. [2021-08-06 14:47:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:45,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:45,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:45,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 14:47:45,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 14:47:45,581 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -650970656, now seen corresponding path program 40 times [2021-08-06 14:47:45,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:45,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093688371] [2021-08-06 14:47:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:45,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:45,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:45,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093688371] [2021-08-06 14:47:45,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093688371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:45,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582086872] [2021-08-06 14:47:45,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:47:45,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:45,870 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:45,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:47:47,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:47:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:47,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:47,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:47,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582086872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:48,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:48,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:48,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004789353] [2021-08-06 14:47:48,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:48,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:48,085 INFO L87 Difference]: Start difference. First operand 3114 states and 12965 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:49,113 INFO L93 Difference]: Finished difference Result 3655 states and 15045 transitions. [2021-08-06 14:47:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:47:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:49,123 INFO L225 Difference]: With dead ends: 3655 [2021-08-06 14:47:49,123 INFO L226 Difference]: Without dead ends: 3634 [2021-08-06 14:47:49,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 884.9ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:47:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-08-06 14:47:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3114. [2021-08-06 14:47:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3113 states have (on average 4.164792804368776) internal successors, (12965), 3113 states have internal predecessors, (12965), 0 states have call successors, (0), 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 14:47:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 12965 transitions. [2021-08-06 14:47:49,181 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 12965 transitions. Word has length 23 [2021-08-06 14:47:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:49,182 INFO L470 AbstractCegarLoop]: Abstraction has 3114 states and 12965 transitions. [2021-08-06 14:47:49,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 12965 transitions. [2021-08-06 14:47:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:49,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:49,188 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:49,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 14:47:49,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:49,389 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1875992388, now seen corresponding path program 41 times [2021-08-06 14:47:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:49,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165140502] [2021-08-06 14:47:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:49,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:49,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:49,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165140502] [2021-08-06 14:47:49,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165140502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:49,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512698630] [2021-08-06 14:47:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:47:49,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:49,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:49,574 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:49,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:47:51,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:47:51,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:51,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:51,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:47:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512698630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:51,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:51,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732575482] [2021-08-06 14:47:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:51,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:51,787 INFO L87 Difference]: Start difference. First operand 3114 states and 12965 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:52,626 INFO L93 Difference]: Finished difference Result 3702 states and 15248 transitions. [2021-08-06 14:47:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:47:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:52,636 INFO L225 Difference]: With dead ends: 3702 [2021-08-06 14:47:52,636 INFO L226 Difference]: Without dead ends: 3676 [2021-08-06 14:47:52,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:47:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-08-06 14:47:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3118. [2021-08-06 14:47:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 4.165222970805261) internal successors, (12983), 3117 states have internal predecessors, (12983), 0 states have call successors, (0), 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 14:47:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 12983 transitions. [2021-08-06 14:47:52,699 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 12983 transitions. Word has length 23 [2021-08-06 14:47:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:52,699 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 12983 transitions. [2021-08-06 14:47:52,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 12983 transitions. [2021-08-06 14:47:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:52,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:52,706 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:52,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 14:47:52,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:52,907 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -805408174, now seen corresponding path program 42 times [2021-08-06 14:47:52,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:52,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421622044] [2021-08-06 14:47:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:52,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:53,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:53,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421622044] [2021-08-06 14:47:53,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421622044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:53,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085361852] [2021-08-06 14:47:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:47:53,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:53,082 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:53,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:47:54,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:47:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:47:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:47:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:47:54,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:47:54,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-08-06 14:47:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:55,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085361852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:55,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:55,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:55,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063909387] [2021-08-06 14:47:55,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:55,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:55,215 INFO L87 Difference]: Start difference. First operand 3118 states and 12983 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:55,752 INFO L93 Difference]: Finished difference Result 3613 states and 14885 transitions. [2021-08-06 14:47:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:47:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:55,762 INFO L225 Difference]: With dead ends: 3613 [2021-08-06 14:47:55,762 INFO L226 Difference]: Without dead ends: 3592 [2021-08-06 14:47:55,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:47:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-08-06 14:47:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3122. [2021-08-06 14:47:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 4.165011214354373) internal successors, (12999), 3121 states have internal predecessors, (12999), 0 states have call successors, (0), 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 14:47:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 12999 transitions. [2021-08-06 14:47:55,817 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 12999 transitions. Word has length 23 [2021-08-06 14:47:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 3122 states and 12999 transitions. [2021-08-06 14:47:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 12999 transitions. [2021-08-06 14:47:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:55,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:55,823 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:55,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 14:47:56,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:56,024 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1570045778, now seen corresponding path program 43 times [2021-08-06 14:47:56,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:56,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603429431] [2021-08-06 14:47:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:56,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:56,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603429431] [2021-08-06 14:47:56,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603429431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273418214] [2021-08-06 14:47:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:47:56,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:56,186 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:56,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:47:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:47:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:47:58,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:47:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:47:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:58,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273418214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:58,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:47:58,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:47:58,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721835702] [2021-08-06 14:47:58,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:47:58,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:47:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:47:58,559 INFO L87 Difference]: Start difference. First operand 3122 states and 12999 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:59,190 INFO L93 Difference]: Finished difference Result 3597 states and 14828 transitions. [2021-08-06 14:47:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:47:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:47:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:59,200 INFO L225 Difference]: With dead ends: 3597 [2021-08-06 14:47:59,200 INFO L226 Difference]: Without dead ends: 3563 [2021-08-06 14:47:59,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 504.9ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:47:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-08-06 14:47:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3134. [2021-08-06 14:47:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3133 states have (on average 4.165336737950846) internal successors, (13050), 3133 states have internal predecessors, (13050), 0 states have call successors, (0), 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 14:47:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 13050 transitions. [2021-08-06 14:47:59,261 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 13050 transitions. Word has length 23 [2021-08-06 14:47:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:59,261 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 13050 transitions. [2021-08-06 14:47:59,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:47:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 13050 transitions. [2021-08-06 14:47:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:47:59,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:59,268 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:59,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:47:59,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-06 14:47:59,469 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:47:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:59,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1724483296, now seen corresponding path program 44 times [2021-08-06 14:47:59,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:59,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486276741] [2021-08-06 14:47:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:59,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:47:59,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486276741] [2021-08-06 14:47:59,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486276741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:47:59,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862353870] [2021-08-06 14:47:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:47:59,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:47:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:59,645 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:47:59,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:48:01,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:01,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:48:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862353870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:01,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:01,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357912980] [2021-08-06 14:48:01,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:01,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:01,972 INFO L87 Difference]: Start difference. First operand 3134 states and 13050 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:02,617 INFO L93 Difference]: Finished difference Result 3625 states and 14936 transitions. [2021-08-06 14:48:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:48:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:02,626 INFO L225 Difference]: With dead ends: 3625 [2021-08-06 14:48:02,626 INFO L226 Difference]: Without dead ends: 3595 [2021-08-06 14:48:02,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:48:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-08-06 14:48:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3134. [2021-08-06 14:48:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3133 states have (on average 4.165336737950846) internal successors, (13050), 3133 states have internal predecessors, (13050), 0 states have call successors, (0), 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 14:48:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 13050 transitions. [2021-08-06 14:48:02,680 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 13050 transitions. Word has length 23 [2021-08-06 14:48:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:02,680 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 13050 transitions. [2021-08-06 14:48:02,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 13050 transitions. [2021-08-06 14:48:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:02,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:02,686 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:02,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 14:48:02,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:02,888 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1805882352, now seen corresponding path program 45 times [2021-08-06 14:48:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:02,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161818379] [2021-08-06 14:48:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:02,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:03,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:03,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161818379] [2021-08-06 14:48:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161818379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:03,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906260305] [2021-08-06 14:48:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:03,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:03,061 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:48:04,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:48:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:05,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:05,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906260305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:05,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:05,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31652699] [2021-08-06 14:48:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:05,483 INFO L87 Difference]: Start difference. First operand 3134 states and 13050 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:06,336 INFO L93 Difference]: Finished difference Result 3495 states and 14432 transitions. [2021-08-06 14:48:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:48:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:06,347 INFO L225 Difference]: With dead ends: 3495 [2021-08-06 14:48:06,347 INFO L226 Difference]: Without dead ends: 3469 [2021-08-06 14:48:06,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:48:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-08-06 14:48:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3138. [2021-08-06 14:48:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 4.165763468281798) internal successors, (13068), 3137 states have internal predecessors, (13068), 0 states have call successors, (0), 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 14:48:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 13068 transitions. [2021-08-06 14:48:06,415 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 13068 transitions. Word has length 23 [2021-08-06 14:48:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:06,416 INFO L470 AbstractCegarLoop]: Abstraction has 3138 states and 13068 transitions. [2021-08-06 14:48:06,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 13068 transitions. [2021-08-06 14:48:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:06,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:06,422 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:06,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 14:48:06,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 14:48:06,623 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -875518210, now seen corresponding path program 46 times [2021-08-06 14:48:06,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:06,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842855690] [2021-08-06 14:48:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:06,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:06,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:06,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842855690] [2021-08-06 14:48:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842855690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:06,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002685607] [2021-08-06 14:48:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:06,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:06,822 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:48:08,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:08,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:08,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:09,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002685607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:09,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:09,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:09,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131516705] [2021-08-06 14:48:09,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:09,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:09,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:09,190 INFO L87 Difference]: Start difference. First operand 3138 states and 13068 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:09,976 INFO L93 Difference]: Finished difference Result 3600 states and 14833 transitions. [2021-08-06 14:48:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:48:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:09,986 INFO L225 Difference]: With dead ends: 3600 [2021-08-06 14:48:09,986 INFO L226 Difference]: Without dead ends: 3579 [2021-08-06 14:48:09,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 708.7ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:48:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-08-06 14:48:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3134. [2021-08-06 14:48:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3133 states have (on average 4.165336737950846) internal successors, (13050), 3133 states have internal predecessors, (13050), 0 states have call successors, (0), 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 14:48:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 13050 transitions. [2021-08-06 14:48:10,038 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 13050 transitions. Word has length 23 [2021-08-06 14:48:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:10,038 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 13050 transitions. [2021-08-06 14:48:10,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 13050 transitions. [2021-08-06 14:48:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:10,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:10,044 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:10,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 14:48:10,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 14:48:10,244 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1730602444, now seen corresponding path program 47 times [2021-08-06 14:48:10,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:10,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793515202] [2021-08-06 14:48:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:10,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:10,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:10,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793515202] [2021-08-06 14:48:10,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793515202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:10,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100605550] [2021-08-06 14:48:10,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:10,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:10,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:10,423 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:10,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:48:12,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:48:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:48:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:12,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-08-06 14:48:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:12,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100605550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:12,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:12,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:48:12,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090138932] [2021-08-06 14:48:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:48:12,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:48:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:48:12,693 INFO L87 Difference]: Start difference. First operand 3134 states and 13050 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:48:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:13,326 INFO L93 Difference]: Finished difference Result 3512 states and 14480 transitions. [2021-08-06 14:48:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:48:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 14:48:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:13,339 INFO L225 Difference]: With dead ends: 3512 [2021-08-06 14:48:13,339 INFO L226 Difference]: Without dead ends: 3503 [2021-08-06 14:48:13,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:48:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-08-06 14:48:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3216. [2021-08-06 14:48:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 4.168895800933126) internal successors, (13403), 3215 states have internal predecessors, (13403), 0 states have call successors, (0), 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 14:48:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 13403 transitions. [2021-08-06 14:48:13,422 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 13403 transitions. Word has length 23 [2021-08-06 14:48:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:13,423 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 13403 transitions. [2021-08-06 14:48:13,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:48:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 13403 transitions. [2021-08-06 14:48:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:13,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:13,430 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:13,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 14:48:13,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 14:48:13,633 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -815520956, now seen corresponding path program 48 times [2021-08-06 14:48:13,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:13,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245772665] [2021-08-06 14:48:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:13,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:13,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:13,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245772665] [2021-08-06 14:48:13,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245772665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:13,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221223935] [2021-08-06 14:48:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:13,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:13,848 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:13,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:48:15,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:48:15,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:48:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:16,006 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-08-06 14:48:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 46 [2021-08-06 14:48:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221223935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:16,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:48:16,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855787132] [2021-08-06 14:48:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:48:16,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:48:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:16,167 INFO L87 Difference]: Start difference. First operand 3216 states and 13403 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:16,905 INFO L93 Difference]: Finished difference Result 3663 states and 15124 transitions. [2021-08-06 14:48:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:48:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:16,915 INFO L225 Difference]: With dead ends: 3663 [2021-08-06 14:48:16,915 INFO L226 Difference]: Without dead ends: 3654 [2021-08-06 14:48:16,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:48:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-08-06 14:48:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3220. [2021-08-06 14:48:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3220 states, 3219 states have (on average 4.168685927306617) internal successors, (13419), 3219 states have internal predecessors, (13419), 0 states have call successors, (0), 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 14:48:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 13419 transitions. [2021-08-06 14:48:16,972 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 13419 transitions. Word has length 23 [2021-08-06 14:48:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:16,972 INFO L470 AbstractCegarLoop]: Abstraction has 3220 states and 13419 transitions. [2021-08-06 14:48:16,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 13419 transitions. [2021-08-06 14:48:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:16,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:16,978 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:17,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 14:48:17,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 14:48:17,179 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash -661083438, now seen corresponding path program 49 times [2021-08-06 14:48:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:17,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434982256] [2021-08-06 14:48:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:17,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:17,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:17,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434982256] [2021-08-06 14:48:17,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434982256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:17,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56789620] [2021-08-06 14:48:17,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:17,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:17,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:17,340 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:17,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:48:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:19,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:48:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56789620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:19,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:19,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:19,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934766969] [2021-08-06 14:48:19,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:19,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:19,871 INFO L87 Difference]: Start difference. First operand 3220 states and 13419 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:20,646 INFO L93 Difference]: Finished difference Result 3778 states and 15576 transitions. [2021-08-06 14:48:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:48:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:20,656 INFO L225 Difference]: With dead ends: 3778 [2021-08-06 14:48:20,656 INFO L226 Difference]: Without dead ends: 3769 [2021-08-06 14:48:20,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:48:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-08-06 14:48:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3224. [2021-08-06 14:48:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.169097114489606) internal successors, (13437), 3223 states have internal predecessors, (13437), 0 states have call successors, (0), 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 14:48:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13437 transitions. [2021-08-06 14:48:20,714 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13437 transitions. Word has length 23 [2021-08-06 14:48:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13437 transitions. [2021-08-06 14:48:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13437 transitions. [2021-08-06 14:48:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:20,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:20,720 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:20,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 14:48:20,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:20,921 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash -579684382, now seen corresponding path program 50 times [2021-08-06 14:48:20,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:20,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121471215] [2021-08-06 14:48:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:20,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:21,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:21,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121471215] [2021-08-06 14:48:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121471215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:21,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40647723] [2021-08-06 14:48:21,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:21,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:21,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:21,161 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:21,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:48:23,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:48:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:48:23,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-08-06 14:48:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:23,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40647723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:23,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:23,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:23,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079997948] [2021-08-06 14:48:23,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:23,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:23,559 INFO L87 Difference]: Start difference. First operand 3224 states and 13437 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:24,136 INFO L93 Difference]: Finished difference Result 3632 states and 15000 transitions. [2021-08-06 14:48:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:48:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:24,146 INFO L225 Difference]: With dead ends: 3632 [2021-08-06 14:48:24,146 INFO L226 Difference]: Without dead ends: 3623 [2021-08-06 14:48:24,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 498.9ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:48:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-08-06 14:48:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3228. [2021-08-06 14:48:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 4.1688875116207) internal successors, (13453), 3227 states have internal predecessors, (13453), 0 states have call successors, (0), 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 14:48:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 13453 transitions. [2021-08-06 14:48:24,204 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 13453 transitions. Word has length 23 [2021-08-06 14:48:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:24,204 INFO L470 AbstractCegarLoop]: Abstraction has 3228 states and 13453 transitions. [2021-08-06 14:48:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 13453 transitions. [2021-08-06 14:48:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:24,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:24,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:24,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:48:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:24,413 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1033882352, now seen corresponding path program 51 times [2021-08-06 14:48:24,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:24,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022177123] [2021-08-06 14:48:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:24,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:24,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:24,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022177123] [2021-08-06 14:48:24,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022177123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:24,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774028744] [2021-08-06 14:48:24,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:24,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:24,655 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:24,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:48:26,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:48:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:26,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:48:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:27,038 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-08-06 14:48:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 47 [2021-08-06 14:48:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:27,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774028744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:27,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:27,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:48:27,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294836888] [2021-08-06 14:48:27,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:48:27,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:48:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:27,268 INFO L87 Difference]: Start difference. First operand 3228 states and 13453 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:28,163 INFO L93 Difference]: Finished difference Result 3693 states and 15244 transitions. [2021-08-06 14:48:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:48:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:28,174 INFO L225 Difference]: With dead ends: 3693 [2021-08-06 14:48:28,174 INFO L226 Difference]: Without dead ends: 3682 [2021-08-06 14:48:28,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 735.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:48:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-08-06 14:48:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3234. [2021-08-06 14:48:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 4.168574079802042) internal successors, (13477), 3233 states have internal predecessors, (13477), 0 states have call successors, (0), 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 14:48:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 13477 transitions. [2021-08-06 14:48:28,234 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 13477 transitions. Word has length 23 [2021-08-06 14:48:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:28,234 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 13477 transitions. [2021-08-06 14:48:28,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 13477 transitions. [2021-08-06 14:48:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:28,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:28,241 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:28,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:48:28,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:28,442 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash 370110242, now seen corresponding path program 52 times [2021-08-06 14:48:28,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:28,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486899180] [2021-08-06 14:48:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:28,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:28,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:28,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486899180] [2021-08-06 14:48:28,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486899180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:28,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933937902] [2021-08-06 14:48:28,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:28,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:28,692 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:28,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:48:30,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:30,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:48:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933937902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:31,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:31,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:31,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000910502] [2021-08-06 14:48:31,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:31,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:31,218 INFO L87 Difference]: Start difference. First operand 3234 states and 13477 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:32,348 INFO L93 Difference]: Finished difference Result 3847 states and 15879 transitions. [2021-08-06 14:48:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:48:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:32,358 INFO L225 Difference]: With dead ends: 3847 [2021-08-06 14:48:32,358 INFO L226 Difference]: Without dead ends: 3825 [2021-08-06 14:48:32,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:48:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-08-06 14:48:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3234. [2021-08-06 14:48:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 4.168574079802042) internal successors, (13477), 3233 states have internal predecessors, (13477), 0 states have call successors, (0), 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 14:48:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 13477 transitions. [2021-08-06 14:48:32,419 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 13477 transitions. Word has length 23 [2021-08-06 14:48:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:32,419 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 13477 transitions. [2021-08-06 14:48:32,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 13477 transitions. [2021-08-06 14:48:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:32,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:32,425 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:32,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 14:48:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-08-06 14:48:32,626 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1725956368, now seen corresponding path program 53 times [2021-08-06 14:48:32,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:32,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087359962] [2021-08-06 14:48:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:32,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:32,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:32,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087359962] [2021-08-06 14:48:32,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087359962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:32,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686410098] [2021-08-06 14:48:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:32,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:32,870 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:32,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:48:34,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:48:34,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:34,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:35,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:35,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:35,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686410098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:35,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:35,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:35,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542173479] [2021-08-06 14:48:35,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:35,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:35,459 INFO L87 Difference]: Start difference. First operand 3234 states and 13477 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:36,514 INFO L93 Difference]: Finished difference Result 3712 states and 15321 transitions. [2021-08-06 14:48:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:48:36,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:36,524 INFO L225 Difference]: With dead ends: 3712 [2021-08-06 14:48:36,524 INFO L226 Difference]: Without dead ends: 3691 [2021-08-06 14:48:36,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:48:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3691 states. [2021-08-06 14:48:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3691 to 3226. [2021-08-06 14:48:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3225 states have (on average 4.1683720930232555) internal successors, (13443), 3225 states have internal predecessors, (13443), 0 states have call successors, (0), 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 14:48:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 13443 transitions. [2021-08-06 14:48:36,582 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 13443 transitions. Word has length 23 [2021-08-06 14:48:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:36,583 INFO L470 AbstractCegarLoop]: Abstraction has 3226 states and 13443 transitions. [2021-08-06 14:48:36,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 13443 transitions. [2021-08-06 14:48:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:36,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:36,589 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:36,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 14:48:36,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:36,789 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:36,790 INFO L82 PathProgramCache]: Analyzing trace with hash 719607620, now seen corresponding path program 54 times [2021-08-06 14:48:36,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:36,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424268103] [2021-08-06 14:48:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:36,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:36,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:36,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424268103] [2021-08-06 14:48:36,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424268103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:36,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332519336] [2021-08-06 14:48:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:48:36,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:36,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:36,957 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:36,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:48:38,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:48:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:38,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:39,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:39,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:48:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:39,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332519336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:39,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:39,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:39,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750440938] [2021-08-06 14:48:39,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:39,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:39,572 INFO L87 Difference]: Start difference. First operand 3226 states and 13443 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:40,293 INFO L93 Difference]: Finished difference Result 3937 states and 16213 transitions. [2021-08-06 14:48:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:48:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:40,303 INFO L225 Difference]: With dead ends: 3937 [2021-08-06 14:48:40,303 INFO L226 Difference]: Without dead ends: 3907 [2021-08-06 14:48:40,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:48:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-08-06 14:48:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3226. [2021-08-06 14:48:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3225 states have (on average 4.1683720930232555) internal successors, (13443), 3225 states have internal predecessors, (13443), 0 states have call successors, (0), 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 14:48:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 13443 transitions. [2021-08-06 14:48:40,365 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 13443 transitions. Word has length 23 [2021-08-06 14:48:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:40,365 INFO L470 AbstractCegarLoop]: Abstraction has 3226 states and 13443 transitions. [2021-08-06 14:48:40,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 13443 transitions. [2021-08-06 14:48:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:40,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:40,371 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:40,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 14:48:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:40,572 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1880393886, now seen corresponding path program 55 times [2021-08-06 14:48:40,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:40,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487612799] [2021-08-06 14:48:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:40,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:40,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:40,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487612799] [2021-08-06 14:48:40,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487612799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:40,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935763444] [2021-08-06 14:48:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:48:40,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:40,757 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:48:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:43,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:43,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935763444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:43,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:43,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904935235] [2021-08-06 14:48:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:43,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:43,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:43,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:43,562 INFO L87 Difference]: Start difference. First operand 3226 states and 13443 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:44,464 INFO L93 Difference]: Finished difference Result 3740 states and 15441 transitions. [2021-08-06 14:48:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:48:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:44,473 INFO L225 Difference]: With dead ends: 3740 [2021-08-06 14:48:44,473 INFO L226 Difference]: Without dead ends: 3719 [2021-08-06 14:48:44,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 716.9ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:48:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-08-06 14:48:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3214. [2021-08-06 14:48:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3213 states have (on average 4.167133520074697) internal successors, (13389), 3213 states have internal predecessors, (13389), 0 states have call successors, (0), 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 14:48:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 13389 transitions. [2021-08-06 14:48:44,533 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 13389 transitions. Word has length 23 [2021-08-06 14:48:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:44,533 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 13389 transitions. [2021-08-06 14:48:44,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 13389 transitions. [2021-08-06 14:48:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:44,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:44,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:44,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 14:48:44,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-06 14:48:44,740 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash 495060066, now seen corresponding path program 56 times [2021-08-06 14:48:44,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:44,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207764834] [2021-08-06 14:48:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:44,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:44,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:44,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207764834] [2021-08-06 14:48:44,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207764834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:44,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343026853] [2021-08-06 14:48:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:48:44,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:44,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:44,904 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:44,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:48:47,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:48:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:47,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:47,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:48:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:47,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343026853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:47,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:47,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:47,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789123244] [2021-08-06 14:48:47,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:47,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:47,615 INFO L87 Difference]: Start difference. First operand 3214 states and 13389 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:48,102 INFO L93 Difference]: Finished difference Result 3602 states and 14877 transitions. [2021-08-06 14:48:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:48:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:48,113 INFO L225 Difference]: With dead ends: 3602 [2021-08-06 14:48:48,113 INFO L226 Difference]: Without dead ends: 3568 [2021-08-06 14:48:48,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:48:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-08-06 14:48:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3218. [2021-08-06 14:48:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 4.166925707180603) internal successors, (13405), 3217 states have internal predecessors, (13405), 0 states have call successors, (0), 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 14:48:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 13405 transitions. [2021-08-06 14:48:48,174 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 13405 transitions. Word has length 23 [2021-08-06 14:48:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 13405 transitions. [2021-08-06 14:48:48,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 13405 transitions. [2021-08-06 14:48:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:48,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:48,181 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:48,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:48:48,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 14:48:48,381 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash 649497584, now seen corresponding path program 57 times [2021-08-06 14:48:48,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:48,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560656995] [2021-08-06 14:48:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:48,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:48,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:48,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560656995] [2021-08-06 14:48:48,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560656995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:48,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277467773] [2021-08-06 14:48:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:48:48,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:48,544 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:48,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:48:50,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:48:50,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:48:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:51,006 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-08-06 14:48:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 46 [2021-08-06 14:48:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277467773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:51,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:48:51,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804063042] [2021-08-06 14:48:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:48:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:48:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:48:51,159 INFO L87 Difference]: Start difference. First operand 3218 states and 13405 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:51,951 INFO L93 Difference]: Finished difference Result 3752 states and 15469 transitions. [2021-08-06 14:48:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:48:51,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:51,961 INFO L225 Difference]: With dead ends: 3752 [2021-08-06 14:48:51,961 INFO L226 Difference]: Without dead ends: 3722 [2021-08-06 14:48:51,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:48:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-08-06 14:48:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3218. [2021-08-06 14:48:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 4.166925707180603) internal successors, (13405), 3217 states have internal predecessors, (13405), 0 states have call successors, (0), 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 14:48:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 13405 transitions. [2021-08-06 14:48:52,021 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 13405 transitions. Word has length 23 [2021-08-06 14:48:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:52,021 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 13405 transitions. [2021-08-06 14:48:52,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:48:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 13405 transitions. [2021-08-06 14:48:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:52,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:52,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:52,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 14:48:52,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:52,228 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash 730896640, now seen corresponding path program 58 times [2021-08-06 14:48:52,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:52,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007006369] [2021-08-06 14:48:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:52,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:52,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:52,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007006369] [2021-08-06 14:48:52,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007006369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:52,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546944753] [2021-08-06 14:48:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:48:52,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:52,415 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:52,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:48:54,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:48:54,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:54,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:54,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:55,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546944753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:55,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:55,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:55,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412576269] [2021-08-06 14:48:55,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:55,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:55,223 INFO L87 Difference]: Start difference. First operand 3218 states and 13405 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:48:55,854 INFO L93 Difference]: Finished difference Result 3591 states and 14848 transitions. [2021-08-06 14:48:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:48:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:48:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:48:55,864 INFO L225 Difference]: With dead ends: 3591 [2021-08-06 14:48:55,864 INFO L226 Difference]: Without dead ends: 3565 [2021-08-06 14:48:55,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:48:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-08-06 14:48:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 3226. [2021-08-06 14:48:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3225 states have (on average 4.167131782945736) internal successors, (13439), 3225 states have internal predecessors, (13439), 0 states have call successors, (0), 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 14:48:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 13439 transitions. [2021-08-06 14:48:55,920 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 13439 transitions. Word has length 23 [2021-08-06 14:48:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:48:55,921 INFO L470 AbstractCegarLoop]: Abstraction has 3226 states and 13439 transitions. [2021-08-06 14:48:55,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:48:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 13439 transitions. [2021-08-06 14:48:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:48:55,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:48:55,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:48:55,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 14:48:56,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:56,127 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:48:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:48:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1950503922, now seen corresponding path program 59 times [2021-08-06 14:48:56,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:48:56,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167555920] [2021-08-06 14:48:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:48:56,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:48:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:48:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:56,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:48:56,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167555920] [2021-08-06 14:48:56,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167555920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:56,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423817384] [2021-08-06 14:48:56,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:48:56,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:48:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:48:56,314 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:48:56,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:48:58,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:48:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:48:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:48:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:48:58,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:48:58,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:48:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:48:59,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423817384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:48:59,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:48:59,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:48:59,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97862695] [2021-08-06 14:48:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:48:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:48:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:48:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:48:59,285 INFO L87 Difference]: Start difference. First operand 3226 states and 13439 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:00,073 INFO L93 Difference]: Finished difference Result 3635 states and 15023 transitions. [2021-08-06 14:49:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:49:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:00,084 INFO L225 Difference]: With dead ends: 3635 [2021-08-06 14:49:00,084 INFO L226 Difference]: Without dead ends: 3614 [2021-08-06 14:49:00,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:49:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2021-08-06 14:49:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3210. [2021-08-06 14:49:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 4.166718603926457) internal successors, (13371), 3209 states have internal predecessors, (13371), 0 states have call successors, (0), 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 14:49:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 13371 transitions. [2021-08-06 14:49:00,152 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 13371 transitions. Word has length 23 [2021-08-06 14:49:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:00,152 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 13371 transitions. [2021-08-06 14:49:00,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 13371 transitions. [2021-08-06 14:49:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:00,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:00,159 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:00,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:00,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-06 14:49:00,361 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1539290320, now seen corresponding path program 60 times [2021-08-06 14:49:00,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:00,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731481489] [2021-08-06 14:49:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:00,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:00,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:00,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731481489] [2021-08-06 14:49:00,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731481489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:00,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31237116] [2021-08-06 14:49:00,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:49:00,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:00,638 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:00,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:49:02,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:49:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:49:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:03,220 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 14:49:03,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-08-06 14:49:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31237116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:03,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:49:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908045092] [2021-08-06 14:49:03,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:03,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:03,336 INFO L87 Difference]: Start difference. First operand 3210 states and 13371 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:04,463 INFO L93 Difference]: Finished difference Result 3763 states and 15507 transitions. [2021-08-06 14:49:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:49:04,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:04,492 INFO L225 Difference]: With dead ends: 3763 [2021-08-06 14:49:04,492 INFO L226 Difference]: Without dead ends: 3741 [2021-08-06 14:49:04,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:49:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2021-08-06 14:49:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3214. [2021-08-06 14:49:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3213 states have (on average 4.167133520074697) internal successors, (13389), 3213 states have internal predecessors, (13389), 0 states have call successors, (0), 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 14:49:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 13389 transitions. [2021-08-06 14:49:04,564 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 13389 transitions. Word has length 23 [2021-08-06 14:49:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:04,564 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 13389 transitions. [2021-08-06 14:49:04,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 13389 transitions. [2021-08-06 14:49:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:04,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:04,570 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:04,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:49:04,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:04,771 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -953956368, now seen corresponding path program 61 times [2021-08-06 14:49:04,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:04,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729643057] [2021-08-06 14:49:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:04,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:05,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:05,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729643057] [2021-08-06 14:49:05,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729643057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:05,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263666714] [2021-08-06 14:49:05,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:49:05,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:05,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:05,060 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:05,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:49:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:07,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:07,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263666714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:07,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:07,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:07,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142546205] [2021-08-06 14:49:07,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:07,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:07,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:07,967 INFO L87 Difference]: Start difference. First operand 3214 states and 13389 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:08,791 INFO L93 Difference]: Finished difference Result 3758 states and 15498 transitions. [2021-08-06 14:49:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:49:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:08,801 INFO L225 Difference]: With dead ends: 3758 [2021-08-06 14:49:08,801 INFO L226 Difference]: Without dead ends: 3732 [2021-08-06 14:49:08,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:49:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-08-06 14:49:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3218. [2021-08-06 14:49:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 4.166925707180603) internal successors, (13405), 3217 states have internal predecessors, (13405), 0 states have call successors, (0), 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 14:49:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 13405 transitions. [2021-08-06 14:49:08,909 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 13405 transitions. Word has length 23 [2021-08-06 14:49:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:08,909 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 13405 transitions. [2021-08-06 14:49:08,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 13405 transitions. [2021-08-06 14:49:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:08,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:08,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:08,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 14:49:09,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:09,141 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 659610366, now seen corresponding path program 62 times [2021-08-06 14:49:09,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:09,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912395564] [2021-08-06 14:49:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:09,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:09,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:09,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912395564] [2021-08-06 14:49:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912395564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:09,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316865665] [2021-08-06 14:49:09,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:09,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:09,380 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:09,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:49:11,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:11,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:11,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:11,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316865665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:12,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:12,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:12,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515833814] [2021-08-06 14:49:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:12,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:12,270 INFO L87 Difference]: Start difference. First operand 3218 states and 13405 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:13,196 INFO L93 Difference]: Finished difference Result 3667 states and 15137 transitions. [2021-08-06 14:49:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:49:13,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:13,206 INFO L225 Difference]: With dead ends: 3667 [2021-08-06 14:49:13,206 INFO L226 Difference]: Without dead ends: 3646 [2021-08-06 14:49:13,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:49:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-08-06 14:49:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3210. [2021-08-06 14:49:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 4.166718603926457) internal successors, (13371), 3209 states have internal predecessors, (13371), 0 states have call successors, (0), 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 14:49:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 13371 transitions. [2021-08-06 14:49:13,310 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 13371 transitions. Word has length 23 [2021-08-06 14:49:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:13,310 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 13371 transitions. [2021-08-06 14:49:13,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 13371 transitions. [2021-08-06 14:49:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:13,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:13,317 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:13,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 14:49:13,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-06 14:49:13,517 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1108393886, now seen corresponding path program 63 times [2021-08-06 14:49:13,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:13,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633472736] [2021-08-06 14:49:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:13,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:13,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:13,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633472736] [2021-08-06 14:49:13,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633472736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:13,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303802207] [2021-08-06 14:49:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:49:13,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:13,686 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:49:16,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:49:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:16,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:16,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303802207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:16,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:16,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:16,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695495186] [2021-08-06 14:49:16,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:16,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:16,635 INFO L87 Difference]: Start difference. First operand 3210 states and 13371 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:17,429 INFO L93 Difference]: Finished difference Result 3734 states and 15411 transitions. [2021-08-06 14:49:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:49:17,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:17,439 INFO L225 Difference]: With dead ends: 3734 [2021-08-06 14:49:17,439 INFO L226 Difference]: Without dead ends: 3708 [2021-08-06 14:49:17,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:49:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-08-06 14:49:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3214. [2021-08-06 14:49:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3213 states have (on average 4.16651104886399) internal successors, (13387), 3213 states have internal predecessors, (13387), 0 states have call successors, (0), 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 14:49:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 13387 transitions. [2021-08-06 14:49:17,498 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 13387 transitions. Word has length 23 [2021-08-06 14:49:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:17,498 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 13387 transitions. [2021-08-06 14:49:17,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 13387 transitions. [2021-08-06 14:49:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:17,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:17,534 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:17,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 14:49:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:17,734 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 505172848, now seen corresponding path program 64 times [2021-08-06 14:49:17,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:17,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591130933] [2021-08-06 14:49:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:17,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:17,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:17,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591130933] [2021-08-06 14:49:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591130933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:17,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935458791] [2021-08-06 14:49:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:49:17,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:17,900 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:17,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:49:20,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:49:20,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:20,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935458791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:20,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869261814] [2021-08-06 14:49:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:20,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:20,852 INFO L87 Difference]: Start difference. First operand 3214 states and 13387 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:21,738 INFO L93 Difference]: Finished difference Result 3679 states and 15197 transitions. [2021-08-06 14:49:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:49:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:21,748 INFO L225 Difference]: With dead ends: 3679 [2021-08-06 14:49:21,748 INFO L226 Difference]: Without dead ends: 3658 [2021-08-06 14:49:21,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:49:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-08-06 14:49:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3202. [2021-08-06 14:49:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 4.165260855982505) internal successors, (13333), 3201 states have internal predecessors, (13333), 0 states have call successors, (0), 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 14:49:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 13333 transitions. [2021-08-06 14:49:21,847 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 13333 transitions. Word has length 23 [2021-08-06 14:49:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:21,847 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 13333 transitions. [2021-08-06 14:49:21,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 13333 transitions. [2021-08-06 14:49:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:21,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:21,853 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:21,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 14:49:22,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:22,054 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:22,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:22,055 INFO L82 PathProgramCache]: Analyzing trace with hash -624208832, now seen corresponding path program 65 times [2021-08-06 14:49:22,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:22,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518144077] [2021-08-06 14:49:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:22,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:22,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518144077] [2021-08-06 14:49:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518144077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619344851] [2021-08-06 14:49:22,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:49:22,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:22,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:22,297 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:22,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:49:24,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:49:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:25,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:25,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:49:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:25,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619344851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:25,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:25,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:25,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361768996] [2021-08-06 14:49:25,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:25,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:25,281 INFO L87 Difference]: Start difference. First operand 3202 states and 13333 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:26,054 INFO L93 Difference]: Finished difference Result 3724 states and 15384 transitions. [2021-08-06 14:49:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:49:26,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:26,064 INFO L225 Difference]: With dead ends: 3724 [2021-08-06 14:49:26,064 INFO L226 Difference]: Without dead ends: 3702 [2021-08-06 14:49:26,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:49:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-08-06 14:49:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3210. [2021-08-06 14:49:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 4.165472109691493) internal successors, (13367), 3209 states have internal predecessors, (13367), 0 states have call successors, (0), 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 14:49:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 13367 transitions. [2021-08-06 14:49:26,125 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 13367 transitions. Word has length 23 [2021-08-06 14:49:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:26,125 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 13367 transitions. [2021-08-06 14:49:26,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 13367 transitions. [2021-08-06 14:49:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:26,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:26,132 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:26,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 14:49:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:26,333 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -38874880, now seen corresponding path program 66 times [2021-08-06 14:49:26,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:26,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453670650] [2021-08-06 14:49:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:26,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:26,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453670650] [2021-08-06 14:49:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453670650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132736380] [2021-08-06 14:49:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:49:26,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:26,567 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:49:29,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:49:29,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:49:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:29,347 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 14:49:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 75 [2021-08-06 14:49:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:29,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132736380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:29,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:29,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:49:29,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629340637] [2021-08-06 14:49:29,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:29,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:29,656 INFO L87 Difference]: Start difference. First operand 3210 states and 13367 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:30,841 INFO L93 Difference]: Finished difference Result 3732 states and 15381 transitions. [2021-08-06 14:49:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:49:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:30,851 INFO L225 Difference]: With dead ends: 3732 [2021-08-06 14:49:30,851 INFO L226 Difference]: Without dead ends: 3706 [2021-08-06 14:49:30,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:49:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-08-06 14:49:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3214. [2021-08-06 14:49:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3213 states have (on average 4.165266106442577) internal successors, (13383), 3213 states have internal predecessors, (13383), 0 states have call successors, (0), 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 14:49:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 13383 transitions. [2021-08-06 14:49:30,912 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 13383 transitions. Word has length 23 [2021-08-06 14:49:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:30,913 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 13383 transitions. [2021-08-06 14:49:30,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 13383 transitions. [2021-08-06 14:49:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:30,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:30,919 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:30,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:31,120 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:31,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1574691854, now seen corresponding path program 67 times [2021-08-06 14:49:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:31,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517363063] [2021-08-06 14:49:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:31,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:31,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:31,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517363063] [2021-08-06 14:49:31,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517363063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:31,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738541885] [2021-08-06 14:49:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:49:31,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:31,356 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:31,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:49:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:34,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:34,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738541885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:34,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:34,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:34,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631103387] [2021-08-06 14:49:34,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:34,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:34,488 INFO L87 Difference]: Start difference. First operand 3214 states and 13383 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:35,395 INFO L93 Difference]: Finished difference Result 3609 states and 14907 transitions. [2021-08-06 14:49:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:49:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:35,405 INFO L225 Difference]: With dead ends: 3609 [2021-08-06 14:49:35,405 INFO L226 Difference]: Without dead ends: 3588 [2021-08-06 14:49:35,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:49:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2021-08-06 14:49:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3206. [2021-08-06 14:49:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 4.165054602184087) internal successors, (13349), 3205 states have internal predecessors, (13349), 0 states have call successors, (0), 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 14:49:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 13349 transitions. [2021-08-06 14:49:35,466 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 13349 transitions. Word has length 23 [2021-08-06 14:49:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:35,466 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 13349 transitions. [2021-08-06 14:49:35,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 13349 transitions. [2021-08-06 14:49:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:35,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:35,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:49:35,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 14:49:35,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:35,673 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash -469771314, now seen corresponding path program 68 times [2021-08-06 14:49:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114597761] [2021-08-06 14:49:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:35,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:35,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:35,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114597761] [2021-08-06 14:49:35,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114597761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:35,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033699727] [2021-08-06 14:49:35,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:35,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:35,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:35,925 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:35,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:49:38,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:38,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:38,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:49:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033699727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:39,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89703954] [2021-08-06 14:49:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:39,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:39,180 INFO L87 Difference]: Start difference. First operand 3206 states and 13349 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:39,751 INFO L93 Difference]: Finished difference Result 3608 states and 14926 transitions. [2021-08-06 14:49:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:49:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:39,761 INFO L225 Difference]: With dead ends: 3608 [2021-08-06 14:49:39,761 INFO L226 Difference]: Without dead ends: 3585 [2021-08-06 14:49:39,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:49:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-08-06 14:49:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3212. [2021-08-06 14:49:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 4.165369043911554) internal successors, (13375), 3211 states have internal predecessors, (13375), 0 states have call successors, (0), 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 14:49:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 13375 transitions. [2021-08-06 14:49:39,823 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 13375 transitions. Word has length 23 [2021-08-06 14:49:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:39,823 INFO L470 AbstractCegarLoop]: Abstraction has 3212 states and 13375 transitions. [2021-08-06 14:49:39,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 14:49:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 13375 transitions. [2021-08-06 14:49:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:39,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:39,831 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, 1] [2021-08-06 14:49:39,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 14:49:40,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 14:49:40,031 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1298904722, now seen corresponding path program 1 times [2021-08-06 14:49:40,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:40,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472892470] [2021-08-06 14:49:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:40,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:40,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472892470] [2021-08-06 14:49:40,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472892470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861652397] [2021-08-06 14:49:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:40,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:40,243 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:40,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:49:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:43,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:43,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:49:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861652397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:43,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:43,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:43,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610639850] [2021-08-06 14:49:43,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:43,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:43,365 INFO L87 Difference]: Start difference. First operand 3212 states and 13375 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:43,996 INFO L93 Difference]: Finished difference Result 3555 states and 14712 transitions. [2021-08-06 14:49:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:49:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:44,006 INFO L225 Difference]: With dead ends: 3555 [2021-08-06 14:49:44,006 INFO L226 Difference]: Without dead ends: 3540 [2021-08-06 14:49:44,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:49:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2021-08-06 14:49:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3218. [2021-08-06 14:49:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 4.165371464096984) internal successors, (13400), 3217 states have internal predecessors, (13400), 0 states have call successors, (0), 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 14:49:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 13400 transitions. [2021-08-06 14:49:44,120 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 13400 transitions. Word has length 23 [2021-08-06 14:49:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:44,120 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 13400 transitions. [2021-08-06 14:49:44,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 13400 transitions. [2021-08-06 14:49:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:44,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:44,127 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, 1] [2021-08-06 14:49:44,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 14:49:44,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 14:49:44,327 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1433692626, now seen corresponding path program 2 times [2021-08-06 14:49:44,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:44,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368326927] [2021-08-06 14:49:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:44,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:44,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:44,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368326927] [2021-08-06 14:49:44,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368326927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:44,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351302386] [2021-08-06 14:49:44,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:49:44,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:44,533 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:44,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:49:47,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:49:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:49:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:47,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:47,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-08-06 14:49:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:47,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351302386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:47,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:47,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:49:47,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60370889] [2021-08-06 14:49:47,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:49:47,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:49:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:49:47,545 INFO L87 Difference]: Start difference. First operand 3218 states and 13400 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:49:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:48,203 INFO L93 Difference]: Finished difference Result 3553 states and 14704 transitions. [2021-08-06 14:49:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:49:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:48,213 INFO L225 Difference]: With dead ends: 3553 [2021-08-06 14:49:48,213 INFO L226 Difference]: Without dead ends: 3538 [2021-08-06 14:49:48,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:49:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-08-06 14:49:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 3232. [2021-08-06 14:49:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 3231 states have (on average 4.166202414113277) internal successors, (13461), 3231 states have internal predecessors, (13461), 0 states have call successors, (0), 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 14:49:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 13461 transitions. [2021-08-06 14:49:48,279 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 13461 transitions. Word has length 23 [2021-08-06 14:49:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:48,279 INFO L470 AbstractCegarLoop]: Abstraction has 3232 states and 13461 transitions. [2021-08-06 14:49:48,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:49:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 13461 transitions. [2021-08-06 14:49:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:48,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:48,286 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, 1] [2021-08-06 14:49:48,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:48,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:48,486 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -848358674, now seen corresponding path program 3 times [2021-08-06 14:49:48,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:48,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488811985] [2021-08-06 14:49:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:48,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:48,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:48,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488811985] [2021-08-06 14:49:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488811985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:48,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522166571] [2021-08-06 14:49:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:49:48,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:48,763 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:48,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:49:51,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:49:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:49:51,807 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-06 14:49:51,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2021-08-06 14:49:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522166571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:52,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:49:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163381716] [2021-08-06 14:49:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:49:52,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:49:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:49:52,010 INFO L87 Difference]: Start difference. First operand 3232 states and 13461 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:52,969 INFO L93 Difference]: Finished difference Result 3648 states and 15076 transitions. [2021-08-06 14:49:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:49:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:49:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:52,981 INFO L225 Difference]: With dead ends: 3648 [2021-08-06 14:49:52,981 INFO L226 Difference]: Without dead ends: 3626 [2021-08-06 14:49:52,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 777.3ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:49:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2021-08-06 14:49:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3244. [2021-08-06 14:49:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 4.166204131976565) internal successors, (13511), 3243 states have internal predecessors, (13511), 0 states have call successors, (0), 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 14:49:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 13511 transitions. [2021-08-06 14:49:53,042 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 13511 transitions. Word has length 23 [2021-08-06 14:49:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:53,042 INFO L470 AbstractCegarLoop]: Abstraction has 3244 states and 13511 transitions. [2021-08-06 14:49:53,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:49:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 13511 transitions. [2021-08-06 14:49:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:53,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:53,049 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, 1] [2021-08-06 14:49:53,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 14:49:53,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:53,249 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 765208060, now seen corresponding path program 4 times [2021-08-06 14:49:53,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:53,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276575950] [2021-08-06 14:49:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:53,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:53,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:53,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276575950] [2021-08-06 14:49:53,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276575950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:53,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50577570] [2021-08-06 14:49:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:49:53,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:53,473 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:53,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:49:56,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:49:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:49:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:49:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:49:56,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:49:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:49:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:56,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50577570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:56,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:49:56,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:49:56,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601854553] [2021-08-06 14:49:56,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:49:56,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:49:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:49:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:49:56,763 INFO L87 Difference]: Start difference. First operand 3244 states and 13511 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:49:57,732 INFO L93 Difference]: Finished difference Result 3502 states and 14498 transitions. [2021-08-06 14:49:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:49:57,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:49:57,743 INFO L225 Difference]: With dead ends: 3502 [2021-08-06 14:49:57,743 INFO L226 Difference]: Without dead ends: 3487 [2021-08-06 14:49:57,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:49:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2021-08-06 14:49:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3240. [2021-08-06 14:49:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 4.165791911083668) internal successors, (13493), 3239 states have internal predecessors, (13493), 0 states have call successors, (0), 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 14:49:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 13493 transitions. [2021-08-06 14:49:57,806 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 13493 transitions. Word has length 23 [2021-08-06 14:49:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:49:57,806 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 13493 transitions. [2021-08-06 14:49:57,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:49:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 13493 transitions. [2021-08-06 14:49:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:49:57,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:49:57,813 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, 1] [2021-08-06 14:49:57,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 14:49:58,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:58,013 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:49:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:49:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1279255108, now seen corresponding path program 5 times [2021-08-06 14:49:58,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:49:58,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611107518] [2021-08-06 14:49:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:49:58,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:49:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:49:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:49:58,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:49:58,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611107518] [2021-08-06 14:49:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611107518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:49:58,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050949883] [2021-08-06 14:49:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:49:58,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:49:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:49:58,225 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:49:58,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:50:00,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:01,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:01,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:50:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050949883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:01,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:01,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:01,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280483426] [2021-08-06 14:50:01,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:01,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:01,511 INFO L87 Difference]: Start difference. First operand 3240 states and 13493 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:02,182 INFO L93 Difference]: Finished difference Result 3550 states and 14692 transitions. [2021-08-06 14:50:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:50:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:02,191 INFO L225 Difference]: With dead ends: 3550 [2021-08-06 14:50:02,191 INFO L226 Difference]: Without dead ends: 3535 [2021-08-06 14:50:02,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:50:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2021-08-06 14:50:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3232. [2021-08-06 14:50:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 3231 states have (on average 4.165583410708759) internal successors, (13459), 3231 states have internal predecessors, (13459), 0 states have call successors, (0), 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 14:50:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 13459 transitions. [2021-08-06 14:50:02,250 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 13459 transitions. Word has length 23 [2021-08-06 14:50:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:02,250 INFO L470 AbstractCegarLoop]: Abstraction has 3232 states and 13459 transitions. [2021-08-06 14:50:02,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 13459 transitions. [2021-08-06 14:50:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:02,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:02,257 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, 1] [2021-08-06 14:50:02,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 14:50:02,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:02,458 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash -439373552, now seen corresponding path program 6 times [2021-08-06 14:50:02,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:02,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303170999] [2021-08-06 14:50:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:02,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:02,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:02,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303170999] [2021-08-06 14:50:02,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303170999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:02,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650219767] [2021-08-06 14:50:02,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:50:02,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:02,692 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:02,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:50:05,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:50:05,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:05,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:50:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:06,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650219767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:06,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:06,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:06,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417611712] [2021-08-06 14:50:06,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:06,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:06,010 INFO L87 Difference]: Start difference. First operand 3232 states and 13459 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:06,918 INFO L93 Difference]: Finished difference Result 3923 states and 16180 transitions. [2021-08-06 14:50:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:50:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:06,929 INFO L225 Difference]: With dead ends: 3923 [2021-08-06 14:50:06,929 INFO L226 Difference]: Without dead ends: 3901 [2021-08-06 14:50:06,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:50:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-08-06 14:50:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 3252. [2021-08-06 14:50:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 4.167640725930483) internal successors, (13549), 3251 states have internal predecessors, (13549), 0 states have call successors, (0), 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 14:50:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 13549 transitions. [2021-08-06 14:50:06,996 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 13549 transitions. Word has length 23 [2021-08-06 14:50:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:06,996 INFO L470 AbstractCegarLoop]: Abstraction has 3252 states and 13549 transitions. [2021-08-06 14:50:06,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 13549 transitions. [2021-08-06 14:50:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:07,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:07,003 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, 1] [2021-08-06 14:50:07,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:07,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:07,203 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 145960400, now seen corresponding path program 7 times [2021-08-06 14:50:07,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:07,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147604551] [2021-08-06 14:50:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:07,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:07,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:07,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147604551] [2021-08-06 14:50:07,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147604551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:07,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231863002] [2021-08-06 14:50:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:50:07,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:07,528 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:07,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:50:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:10,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:50:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231863002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:10,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:10,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722118031] [2021-08-06 14:50:10,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:10,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:10,906 INFO L87 Difference]: Start difference. First operand 3252 states and 13549 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:11,835 INFO L93 Difference]: Finished difference Result 3794 states and 15654 transitions. [2021-08-06 14:50:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:50:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:11,845 INFO L225 Difference]: With dead ends: 3794 [2021-08-06 14:50:11,845 INFO L226 Difference]: Without dead ends: 3768 [2021-08-06 14:50:11,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:50:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-08-06 14:50:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3256. [2021-08-06 14:50:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 4.167434715821813) internal successors, (13565), 3255 states have internal predecessors, (13565), 0 states have call successors, (0), 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 14:50:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 13565 transitions. [2021-08-06 14:50:11,910 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 13565 transitions. Word has length 23 [2021-08-06 14:50:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:11,910 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 13565 transitions. [2021-08-06 14:50:11,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 13565 transitions. [2021-08-06 14:50:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:11,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:11,917 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, 1] [2021-08-06 14:50:11,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 14:50:12,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 14:50:12,121 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1759527134, now seen corresponding path program 8 times [2021-08-06 14:50:12,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:12,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478228440] [2021-08-06 14:50:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:12,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:12,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:12,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478228440] [2021-08-06 14:50:12,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478228440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:12,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137302976] [2021-08-06 14:50:12,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:50:12,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:12,360 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:12,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:50:15,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:15,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:15,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:50:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:15,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137302976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:15,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:15,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:15,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615153165] [2021-08-06 14:50:15,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:15,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:15,735 INFO L87 Difference]: Start difference. First operand 3256 states and 13565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:16,741 INFO L93 Difference]: Finished difference Result 3766 states and 15542 transitions. [2021-08-06 14:50:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:50:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:16,751 INFO L225 Difference]: With dead ends: 3766 [2021-08-06 14:50:16,752 INFO L226 Difference]: Without dead ends: 3745 [2021-08-06 14:50:16,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:50:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-08-06 14:50:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3248. [2021-08-06 14:50:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.1672312904219275) internal successors, (13531), 3247 states have internal predecessors, (13531), 0 states have call successors, (0), 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 14:50:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13531 transitions. [2021-08-06 14:50:16,840 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13531 transitions. Word has length 23 [2021-08-06 14:50:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:16,840 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13531 transitions. [2021-08-06 14:50:16,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13531 transitions. [2021-08-06 14:50:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:16,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:16,849 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, 1] [2021-08-06 14:50:16,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 14:50:17,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:17,077 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -89876174, now seen corresponding path program 9 times [2021-08-06 14:50:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:17,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312673858] [2021-08-06 14:50:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:17,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:17,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312673858] [2021-08-06 14:50:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312673858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272051281] [2021-08-06 14:50:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:50:17,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:17,287 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:17,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:50:20,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:50:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:50:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:50:20,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:20,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 33 [2021-08-06 14:50:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:20,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272051281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:20,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:20,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:20,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773777323] [2021-08-06 14:50:20,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:20,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:20,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:20,612 INFO L87 Difference]: Start difference. First operand 3248 states and 13531 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:21,214 INFO L93 Difference]: Finished difference Result 3931 states and 16211 transitions. [2021-08-06 14:50:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:50:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:21,226 INFO L225 Difference]: With dead ends: 3931 [2021-08-06 14:50:21,227 INFO L226 Difference]: Without dead ends: 3900 [2021-08-06 14:50:21,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:50:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-08-06 14:50:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3259. [2021-08-06 14:50:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.166666666666667) internal successors, (13575), 3258 states have internal predecessors, (13575), 0 states have call successors, (0), 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 14:50:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13575 transitions. [2021-08-06 14:50:21,288 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13575 transitions. Word has length 23 [2021-08-06 14:50:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:21,289 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13575 transitions. [2021-08-06 14:50:21,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13575 transitions. [2021-08-06 14:50:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:21,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:21,295 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, 1] [2021-08-06 14:50:21,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:50:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:21,496 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -8477118, now seen corresponding path program 10 times [2021-08-06 14:50:21,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:21,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852255551] [2021-08-06 14:50:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:21,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:21,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852255551] [2021-08-06 14:50:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852255551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233735524] [2021-08-06 14:50:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:50:21,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:21,737 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:21,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:50:24,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:50:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:24,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:50:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:25,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233735524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:25,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:25,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:25,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327514100] [2021-08-06 14:50:25,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:25,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:25,232 INFO L87 Difference]: Start difference. First operand 3259 states and 13575 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:26,212 INFO L93 Difference]: Finished difference Result 3815 states and 15740 transitions. [2021-08-06 14:50:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:50:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:26,224 INFO L225 Difference]: With dead ends: 3815 [2021-08-06 14:50:26,224 INFO L226 Difference]: Without dead ends: 3789 [2021-08-06 14:50:26,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 922.5ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:50:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-08-06 14:50:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3267. [2021-08-06 14:50:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.166870789957134) internal successors, (13609), 3266 states have internal predecessors, (13609), 0 states have call successors, (0), 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 14:50:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13609 transitions. [2021-08-06 14:50:26,290 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13609 transitions. Word has length 23 [2021-08-06 14:50:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:26,290 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13609 transitions. [2021-08-06 14:50:26,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13609 transitions. [2021-08-06 14:50:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:26,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:26,298 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, 1] [2021-08-06 14:50:26,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:26,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-06 14:50:26,505 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1605089616, now seen corresponding path program 11 times [2021-08-06 14:50:26,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:26,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702459844] [2021-08-06 14:50:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:26,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:26,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:26,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702459844] [2021-08-06 14:50:26,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702459844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529201417] [2021-08-06 14:50:26,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:50:26,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:26,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:26,750 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:26,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:50:29,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:50:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:50:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:29,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-08-06 14:50:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:30,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529201417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:30,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:30,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:50:30,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086506440] [2021-08-06 14:50:30,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:50:30,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:50:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:50:30,278 INFO L87 Difference]: Start difference. First operand 3267 states and 13609 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:50:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:32,192 INFO L93 Difference]: Finished difference Result 3783 states and 15615 transitions. [2021-08-06 14:50:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:50:32,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 14:50:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:32,202 INFO L225 Difference]: With dead ends: 3783 [2021-08-06 14:50:32,202 INFO L226 Difference]: Without dead ends: 3762 [2021-08-06 14:50:32,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1908.9ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:50:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-08-06 14:50:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3255. [2021-08-06 14:50:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 4.165642286416718) internal successors, (13555), 3254 states have internal predecessors, (13555), 0 states have call successors, (0), 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 14:50:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 13555 transitions. [2021-08-06 14:50:32,260 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 13555 transitions. Word has length 23 [2021-08-06 14:50:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:32,260 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 13555 transitions. [2021-08-06 14:50:32,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:50:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 13555 transitions. [2021-08-06 14:50:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:32,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:32,266 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, 1] [2021-08-06 14:50:32,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 14:50:32,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:32,467 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash 475707936, now seen corresponding path program 12 times [2021-08-06 14:50:32,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:32,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762567361] [2021-08-06 14:50:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:32,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:32,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:32,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762567361] [2021-08-06 14:50:32,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762567361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:32,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688025211] [2021-08-06 14:50:32,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:50:32,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:32,696 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:32,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:50:35,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:50:35,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:35,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:35,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:50:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688025211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:36,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:36,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:36,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199260276] [2021-08-06 14:50:36,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:36,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:36,148 INFO L87 Difference]: Start difference. First operand 3255 states and 13555 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:36,910 INFO L93 Difference]: Finished difference Result 3743 states and 15458 transitions. [2021-08-06 14:50:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:50:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:36,920 INFO L225 Difference]: With dead ends: 3743 [2021-08-06 14:50:36,920 INFO L226 Difference]: Without dead ends: 3721 [2021-08-06 14:50:36,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 519.2ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:50:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-08-06 14:50:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3263. [2021-08-06 14:50:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 4.165849172286941) internal successors, (13589), 3262 states have internal predecessors, (13589), 0 states have call successors, (0), 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 14:50:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 13589 transitions. [2021-08-06 14:50:36,984 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 13589 transitions. Word has length 23 [2021-08-06 14:50:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:36,985 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 13589 transitions. [2021-08-06 14:50:36,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 13589 transitions. [2021-08-06 14:50:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:36,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:36,991 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, 1] [2021-08-06 14:50:37,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:50:37,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:37,192 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:37,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1061041888, now seen corresponding path program 13 times [2021-08-06 14:50:37,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:37,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320261259] [2021-08-06 14:50:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:37,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:37,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320261259] [2021-08-06 14:50:37,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320261259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:37,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927664213] [2021-08-06 14:50:37,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:50:37,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:37,418 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:37,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:50:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:40,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:50:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:40,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927664213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:40,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:40,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:40,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663265526] [2021-08-06 14:50:40,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:40,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:40,986 INFO L87 Difference]: Start difference. First operand 3263 states and 13589 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:41,859 INFO L93 Difference]: Finished difference Result 3659 states and 15114 transitions. [2021-08-06 14:50:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:50:41,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:41,868 INFO L225 Difference]: With dead ends: 3659 [2021-08-06 14:50:41,868 INFO L226 Difference]: Without dead ends: 3633 [2021-08-06 14:50:41,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:50:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-08-06 14:50:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3267. [2021-08-06 14:50:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.165646050214329) internal successors, (13605), 3266 states have internal predecessors, (13605), 0 states have call successors, (0), 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 14:50:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13605 transitions. [2021-08-06 14:50:41,927 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13605 transitions. Word has length 23 [2021-08-06 14:50:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13605 transitions. [2021-08-06 14:50:41,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13605 transitions. [2021-08-06 14:50:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:41,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:41,934 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, 1] [2021-08-06 14:50:41,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 14:50:42,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 14:50:42,135 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1620358674, now seen corresponding path program 14 times [2021-08-06 14:50:42,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:42,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904665448] [2021-08-06 14:50:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:42,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:42,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:42,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904665448] [2021-08-06 14:50:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904665448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:42,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296022812] [2021-08-06 14:50:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:50:42,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:42,347 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:42,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:50:45,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:45,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:45,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:45,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:50:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:45,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296022812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:45,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:50:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994328941] [2021-08-06 14:50:45,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:50:45,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:50:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:50:45,931 INFO L87 Difference]: Start difference. First operand 3267 states and 13605 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:46,732 INFO L93 Difference]: Finished difference Result 3631 states and 15006 transitions. [2021-08-06 14:50:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:50:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:46,742 INFO L225 Difference]: With dead ends: 3631 [2021-08-06 14:50:46,743 INFO L226 Difference]: Without dead ends: 3610 [2021-08-06 14:50:46,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:50:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-08-06 14:50:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3259. [2021-08-06 14:50:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.165438919582566) internal successors, (13571), 3258 states have internal predecessors, (13571), 0 states have call successors, (0), 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 14:50:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13571 transitions. [2021-08-06 14:50:46,825 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13571 transitions. Word has length 23 [2021-08-06 14:50:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:46,826 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13571 transitions. [2021-08-06 14:50:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:50:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13571 transitions. [2021-08-06 14:50:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:46,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:46,832 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, 1] [2021-08-06 14:50:46,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 14:50:47,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 14:50:47,032 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash 630145454, now seen corresponding path program 15 times [2021-08-06 14:50:47,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311945673] [2021-08-06 14:50:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:47,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:47,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:47,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311945673] [2021-08-06 14:50:47,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311945673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:47,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550572316] [2021-08-06 14:50:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:50:47,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:47,257 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:47,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:50:50,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:50:50,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:50:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:50:50,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:50:50,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:50,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-08-06 14:50:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:50,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550572316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:50,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:50,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:50:50,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587327641] [2021-08-06 14:50:50,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:50:50,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:50:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:50:50,929 INFO L87 Difference]: Start difference. First operand 3259 states and 13571 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:50:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:51,338 INFO L93 Difference]: Finished difference Result 3557 states and 14725 transitions. [2021-08-06 14:50:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:50:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 23 [2021-08-06 14:50:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:51,347 INFO L225 Difference]: With dead ends: 3557 [2021-08-06 14:50:51,348 INFO L226 Difference]: Without dead ends: 3534 [2021-08-06 14:50:51,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:50:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-08-06 14:50:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 3247. [2021-08-06 14:50:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 4.164202094886013) internal successors, (13517), 3246 states have internal predecessors, (13517), 0 states have call successors, (0), 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 14:50:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 13517 transitions. [2021-08-06 14:50:51,400 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 13517 transitions. Word has length 23 [2021-08-06 14:50:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:51,401 INFO L470 AbstractCegarLoop]: Abstraction has 3247 states and 13517 transitions. [2021-08-06 14:50:51,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:50:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 13517 transitions. [2021-08-06 14:50:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:51,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:51,406 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:51,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:50:51,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 14:50:51,607 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1608187924, now seen corresponding path program 7 times [2021-08-06 14:50:51,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:51,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98334254] [2021-08-06 14:50:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:51,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:51,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:51,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98334254] [2021-08-06 14:50:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98334254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:51,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746778726] [2021-08-06 14:50:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:50:51,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:51,840 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:51,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:50:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:50:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:50:55,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:50:55,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-08-06 14:50:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:55,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746778726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:55,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:50:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:50:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021528811] [2021-08-06 14:50:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:50:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:50:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:50:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:50:55,675 INFO L87 Difference]: Start difference. First operand 3247 states and 13517 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:50:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:50:56,348 INFO L93 Difference]: Finished difference Result 3617 states and 14959 transitions. [2021-08-06 14:50:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:50:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 23 [2021-08-06 14:50:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:50:56,357 INFO L225 Difference]: With dead ends: 3617 [2021-08-06 14:50:56,357 INFO L226 Difference]: Without dead ends: 3600 [2021-08-06 14:50:56,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:50:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-08-06 14:50:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3279. [2021-08-06 14:50:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 3278 states have (on average 4.165954850518609) internal successors, (13656), 3278 states have internal predecessors, (13656), 0 states have call successors, (0), 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 14:50:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 13656 transitions. [2021-08-06 14:50:56,415 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 13656 transitions. Word has length 23 [2021-08-06 14:50:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:50:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 13656 transitions. [2021-08-06 14:50:56,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:50:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 13656 transitions. [2021-08-06 14:50:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:50:56,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:50:56,423 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:50:56,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 14:50:56,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:56,623 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:50:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:50:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2030122192, now seen corresponding path program 8 times [2021-08-06 14:50:56,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:50:56,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290998656] [2021-08-06 14:50:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:50:56,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:50:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:50:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:50:56,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:50:56,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290998656] [2021-08-06 14:50:56,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290998656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:50:56,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741955111] [2021-08-06 14:50:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:50:56,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:50:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:50:56,856 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:50:56,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:50:59,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:50:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:50:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:50:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:51:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:51:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:51:00,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:00,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-08-06 14:51:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741955111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:00,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:00,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:51:00,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305807814] [2021-08-06 14:51:00,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:51:00,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:51:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:51:00,544 INFO L87 Difference]: Start difference. First operand 3279 states and 13656 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) 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 14:51:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:00,985 INFO L93 Difference]: Finished difference Result 3829 states and 15790 transitions. [2021-08-06 14:51:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:51:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) 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 23 [2021-08-06 14:51:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:00,994 INFO L225 Difference]: With dead ends: 3829 [2021-08-06 14:51:00,994 INFO L226 Difference]: Without dead ends: 3788 [2021-08-06 14:51:00,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:51:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-08-06 14:51:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3315. [2021-08-06 14:51:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 4.168376584188292) internal successors, (13814), 3314 states have internal predecessors, (13814), 0 states have call successors, (0), 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 14:51:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 13814 transitions. [2021-08-06 14:51:01,053 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 13814 transitions. Word has length 23 [2021-08-06 14:51:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:01,053 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 13814 transitions. [2021-08-06 14:51:01,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) 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 14:51:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 13814 transitions. [2021-08-06 14:51:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:01,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:01,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:01,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 14:51:01,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-06 14:51:01,260 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1358684144, now seen corresponding path program 9 times [2021-08-06 14:51:01,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:01,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164399098] [2021-08-06 14:51:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:01,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:01,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:01,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164399098] [2021-08-06 14:51:01,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164399098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:01,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631333839] [2021-08-06 14:51:01,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:51:01,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:01,468 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:01,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:51:04,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:51:04,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:04,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:51:04,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:51:04,926 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-06 14:51:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2021-08-06 14:51:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:05,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631333839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:05,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:51:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013868488] [2021-08-06 14:51:05,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:05,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:05,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:05,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:05,136 INFO L87 Difference]: Start difference. First operand 3315 states and 13814 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:51:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:06,120 INFO L93 Difference]: Finished difference Result 4108 states and 16902 transitions. [2021-08-06 14:51:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:51:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:51:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:06,132 INFO L225 Difference]: With dead ends: 4108 [2021-08-06 14:51:06,132 INFO L226 Difference]: Without dead ends: 4052 [2021-08-06 14:51:06,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 735.2ms TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:51:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-08-06 14:51:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3338. [2021-08-06 14:51:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 4.167216062331436) internal successors, (13906), 3337 states have internal predecessors, (13906), 0 states have call successors, (0), 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 14:51:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 13906 transitions. [2021-08-06 14:51:06,193 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 13906 transitions. Word has length 23 [2021-08-06 14:51:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:06,193 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 13906 transitions. [2021-08-06 14:51:06,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:51:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 13906 transitions. [2021-08-06 14:51:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:06,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:06,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:06,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 14:51:06,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 14:51:06,400 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1860571996, now seen corresponding path program 10 times [2021-08-06 14:51:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:06,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683017485] [2021-08-06 14:51:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:06,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:06,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683017485] [2021-08-06 14:51:06,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683017485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986739571] [2021-08-06 14:51:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:51:06,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:06,596 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:06,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:51:09,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:51:09,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:10,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:10,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-08-06 14:51:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:10,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986739571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:10,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:10,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:51:10,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753448077] [2021-08-06 14:51:10,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:51:10,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:51:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:51:10,608 INFO L87 Difference]: Start difference. First operand 3338 states and 13906 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:51:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:11,699 INFO L93 Difference]: Finished difference Result 3790 states and 15673 transitions. [2021-08-06 14:51:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:51:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:51:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:11,709 INFO L225 Difference]: With dead ends: 3790 [2021-08-06 14:51:11,709 INFO L226 Difference]: Without dead ends: 3767 [2021-08-06 14:51:11,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:51:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-08-06 14:51:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3332. [2021-08-06 14:51:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 4.167517262083458) internal successors, (13882), 3331 states have internal predecessors, (13882), 0 states have call successors, (0), 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 14:51:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 13882 transitions. [2021-08-06 14:51:11,766 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 13882 transitions. Word has length 23 [2021-08-06 14:51:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:11,767 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 13882 transitions. [2021-08-06 14:51:11,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:51:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 13882 transitions. [2021-08-06 14:51:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:11,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:11,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:11,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:11,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:11,973 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:11,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:11,974 INFO L82 PathProgramCache]: Analyzing trace with hash 936147684, now seen corresponding path program 11 times [2021-08-06 14:51:11,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:11,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217628986] [2021-08-06 14:51:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:11,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:12,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:12,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217628986] [2021-08-06 14:51:12,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217628986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:12,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256222709] [2021-08-06 14:51:12,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:51:12,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:12,169 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:12,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:51:15,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:51:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:15,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:15,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:15,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-08-06 14:51:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256222709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:16,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:51:16,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670874951] [2021-08-06 14:51:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:51:16,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:51:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:51:16,170 INFO L87 Difference]: Start difference. First operand 3332 states and 13882 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:51:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:16,936 INFO L93 Difference]: Finished difference Result 3858 states and 15949 transitions. [2021-08-06 14:51:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:51:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:51:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:16,945 INFO L225 Difference]: With dead ends: 3858 [2021-08-06 14:51:16,945 INFO L226 Difference]: Without dead ends: 3833 [2021-08-06 14:51:16,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 619.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:51:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-08-06 14:51:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3336. [2021-08-06 14:51:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 4.1673163418290855) internal successors, (13898), 3335 states have internal predecessors, (13898), 0 states have call successors, (0), 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 14:51:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 13898 transitions. [2021-08-06 14:51:17,000 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 13898 transitions. Word has length 23 [2021-08-06 14:51:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 13898 transitions. [2021-08-06 14:51:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:51:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 13898 transitions. [2021-08-06 14:51:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:17,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:17,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:17,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 14:51:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:17,207 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 921284856, now seen corresponding path program 12 times [2021-08-06 14:51:17,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:17,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900699961] [2021-08-06 14:51:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:17,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:17,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:17,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900699961] [2021-08-06 14:51:17,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900699961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:17,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795349402] [2021-08-06 14:51:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:51:17,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:17,471 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:17,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:51:20,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:51:20,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:21,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:51:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:21,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795349402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:21,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:21,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:21,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033960223] [2021-08-06 14:51:21,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:21,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:21,326 INFO L87 Difference]: Start difference. First operand 3336 states and 13898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:22,015 INFO L93 Difference]: Finished difference Result 4205 states and 17270 transitions. [2021-08-06 14:51:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:51:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:22,026 INFO L225 Difference]: With dead ends: 4205 [2021-08-06 14:51:22,026 INFO L226 Difference]: Without dead ends: 4170 [2021-08-06 14:51:22,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:51:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-08-06 14:51:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3364. [2021-08-06 14:51:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 4.167707404103479) internal successors, (14016), 3363 states have internal predecessors, (14016), 0 states have call successors, (0), 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 14:51:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 14016 transitions. [2021-08-06 14:51:22,088 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 14016 transitions. Word has length 23 [2021-08-06 14:51:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 14016 transitions. [2021-08-06 14:51:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 14016 transitions. [2021-08-06 14:51:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:22,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:22,096 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:22,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:51:22,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-06 14:51:22,296 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1509030178, now seen corresponding path program 13 times [2021-08-06 14:51:22,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:22,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124920948] [2021-08-06 14:51:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:22,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:22,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:22,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124920948] [2021-08-06 14:51:22,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124920948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:22,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917798027] [2021-08-06 14:51:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:51:22,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:22,538 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:22,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:51:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:26,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:51:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:26,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917798027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:26,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:26,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:26,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956625409] [2021-08-06 14:51:26,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:26,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:26,494 INFO L87 Difference]: Start difference. First operand 3364 states and 14016 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:27,341 INFO L93 Difference]: Finished difference Result 4010 states and 16520 transitions. [2021-08-06 14:51:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:51:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:27,352 INFO L225 Difference]: With dead ends: 4010 [2021-08-06 14:51:27,352 INFO L226 Difference]: Without dead ends: 3982 [2021-08-06 14:51:27,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 700.8ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:51:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2021-08-06 14:51:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3370. [2021-08-06 14:51:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 4.167408726625111) internal successors, (14040), 3369 states have internal predecessors, (14040), 0 states have call successors, (0), 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 14:51:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 14040 transitions. [2021-08-06 14:51:27,415 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 14040 transitions. Word has length 23 [2021-08-06 14:51:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:27,415 INFO L470 AbstractCegarLoop]: Abstraction has 3370 states and 14040 transitions. [2021-08-06 14:51:27,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 14040 transitions. [2021-08-06 14:51:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:27,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:27,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:27,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:27,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:27,622 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1710225962, now seen corresponding path program 14 times [2021-08-06 14:51:27,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:27,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500304475] [2021-08-06 14:51:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:27,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:27,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:27,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500304475] [2021-08-06 14:51:27,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500304475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:27,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965025092] [2021-08-06 14:51:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:51:27,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:27,873 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:27,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:51:31,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:51:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:31,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:31,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:51:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:31,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965025092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:31,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:31,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935011422] [2021-08-06 14:51:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:31,748 INFO L87 Difference]: Start difference. First operand 3370 states and 14040 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:32,486 INFO L93 Difference]: Finished difference Result 3989 states and 16452 transitions. [2021-08-06 14:51:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:51:32,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:32,496 INFO L225 Difference]: With dead ends: 3989 [2021-08-06 14:51:32,496 INFO L226 Difference]: Without dead ends: 3966 [2021-08-06 14:51:32,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:51:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-08-06 14:51:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3374. [2021-08-06 14:51:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 4.167210198636229) internal successors, (14056), 3373 states have internal predecessors, (14056), 0 states have call successors, (0), 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 14:51:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 14056 transitions. [2021-08-06 14:51:32,566 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 14056 transitions. Word has length 23 [2021-08-06 14:51:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:32,566 INFO L470 AbstractCegarLoop]: Abstraction has 3374 states and 14056 transitions. [2021-08-06 14:51:32,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 14056 transitions. [2021-08-06 14:51:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:32,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:32,573 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:32,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:32,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 14:51:32,777 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -865529710, now seen corresponding path program 15 times [2021-08-06 14:51:32,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:32,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841067273] [2021-08-06 14:51:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:32,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:32,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:32,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841067273] [2021-08-06 14:51:32,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841067273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:32,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052407574] [2021-08-06 14:51:32,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:51:32,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:32,966 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:32,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:51:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:51:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 14:51:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:36,678 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-08-06 14:51:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 46 [2021-08-06 14:51:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052407574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:36,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:36,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:51:36,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240903102] [2021-08-06 14:51:36,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:51:36,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:51:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:51:36,792 INFO L87 Difference]: Start difference. First operand 3374 states and 14056 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:51:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:37,603 INFO L93 Difference]: Finished difference Result 4187 states and 17275 transitions. [2021-08-06 14:51:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:51:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:51:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:37,613 INFO L225 Difference]: With dead ends: 4187 [2021-08-06 14:51:37,614 INFO L226 Difference]: Without dead ends: 4163 [2021-08-06 14:51:37,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:51:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-08-06 14:51:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3398. [2021-08-06 14:51:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 4.16985575507801) internal successors, (14165), 3397 states have internal predecessors, (14165), 0 states have call successors, (0), 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 14:51:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 14165 transitions. [2021-08-06 14:51:37,675 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 14165 transitions. Word has length 23 [2021-08-06 14:51:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:37,675 INFO L470 AbstractCegarLoop]: Abstraction has 3398 states and 14165 transitions. [2021-08-06 14:51:37,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:51:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 14165 transitions. [2021-08-06 14:51:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:37,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:37,681 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:37,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 14:51:37,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 14:51:37,882 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1771690670, now seen corresponding path program 16 times [2021-08-06 14:51:37,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:37,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500692163] [2021-08-06 14:51:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:37,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:38,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:38,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500692163] [2021-08-06 14:51:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500692163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:38,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574014704] [2021-08-06 14:51:38,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:51:38,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:38,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:38,124 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:38,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:51:41,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:51:41,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:41,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:51:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:42,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574014704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:42,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:42,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:42,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659379793] [2021-08-06 14:51:42,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:42,090 INFO L87 Difference]: Start difference. First operand 3398 states and 14165 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:42,881 INFO L93 Difference]: Finished difference Result 3935 states and 16251 transitions. [2021-08-06 14:51:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:51:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:42,890 INFO L225 Difference]: With dead ends: 3935 [2021-08-06 14:51:42,890 INFO L226 Difference]: Without dead ends: 3907 [2021-08-06 14:51:42,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 680.1ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:51:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-08-06 14:51:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3404. [2021-08-06 14:51:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 4.169556273875992) internal successors, (14189), 3403 states have internal predecessors, (14189), 0 states have call successors, (0), 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 14:51:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 14189 transitions. [2021-08-06 14:51:42,947 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 14189 transitions. Word has length 23 [2021-08-06 14:51:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:42,947 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 14189 transitions. [2021-08-06 14:51:42,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 14189 transitions. [2021-08-06 14:51:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:42,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:42,953 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:42,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 14:51:43,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:43,154 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash -695979514, now seen corresponding path program 17 times [2021-08-06 14:51:43,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:43,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254256829] [2021-08-06 14:51:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:43,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:43,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:43,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254256829] [2021-08-06 14:51:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254256829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:43,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47022593] [2021-08-06 14:51:43,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:51:43,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:43,357 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:43,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:51:46,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:51:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:47,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:51:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47022593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:47,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:47,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:47,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136540668] [2021-08-06 14:51:47,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:47,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:47,457 INFO L87 Difference]: Start difference. First operand 3404 states and 14189 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:48,229 INFO L93 Difference]: Finished difference Result 3956 states and 16339 transitions. [2021-08-06 14:51:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:51:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:48,239 INFO L225 Difference]: With dead ends: 3956 [2021-08-06 14:51:48,239 INFO L226 Difference]: Without dead ends: 3933 [2021-08-06 14:51:48,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:51:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-08-06 14:51:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3392. [2021-08-06 14:51:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 4.169271601297552) internal successors, (14138), 3391 states have internal predecessors, (14138), 0 states have call successors, (0), 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 14:51:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 14138 transitions. [2021-08-06 14:51:48,297 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 14138 transitions. Word has length 23 [2021-08-06 14:51:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 3392 states and 14138 transitions. [2021-08-06 14:51:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 14138 transitions. [2021-08-06 14:51:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:48,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:48,304 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:48,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 14:51:48,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:51:48,505 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1030738572, now seen corresponding path program 18 times [2021-08-06 14:51:48,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:48,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226719402] [2021-08-06 14:51:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:48,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:48,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:48,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226719402] [2021-08-06 14:51:48,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226719402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:48,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136433482] [2021-08-06 14:51:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:51:48,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:48,684 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:48,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:51:52,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:51:52,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:51:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:52,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:51:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:52,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136433482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:52,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:52,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:52,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502100949] [2021-08-06 14:51:52,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:52,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:52,931 INFO L87 Difference]: Start difference. First operand 3392 states and 14138 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:53,719 INFO L93 Difference]: Finished difference Result 4260 states and 17525 transitions. [2021-08-06 14:51:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:51:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:53,729 INFO L225 Difference]: With dead ends: 4260 [2021-08-06 14:51:53,729 INFO L226 Difference]: Without dead ends: 4229 [2021-08-06 14:51:53,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:51:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-08-06 14:51:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3405. [2021-08-06 14:51:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 3404 states have (on average 4.174500587544066) internal successors, (14210), 3404 states have internal predecessors, (14210), 0 states have call successors, (0), 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 14:51:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 14210 transitions. [2021-08-06 14:51:53,797 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 14210 transitions. Word has length 23 [2021-08-06 14:51:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:53,797 INFO L470 AbstractCegarLoop]: Abstraction has 3405 states and 14210 transitions. [2021-08-06 14:51:53,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 14210 transitions. [2021-08-06 14:51:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:53,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:53,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:53,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 14:51:54,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 14:51:54,005 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -442993250, now seen corresponding path program 19 times [2021-08-06 14:51:54,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:54,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275724378] [2021-08-06 14:51:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:54,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:54,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:54,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275724378] [2021-08-06 14:51:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275724378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:54,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231905706] [2021-08-06 14:51:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:51:54,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:54,194 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:54,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:51:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:51:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:51:57,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:51:57,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:51:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:58,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231905706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:58,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:51:58,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:51:58,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99911943] [2021-08-06 14:51:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:51:58,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:51:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:51:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:51:58,248 INFO L87 Difference]: Start difference. First operand 3405 states and 14210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:51:59,048 INFO L93 Difference]: Finished difference Result 4019 states and 16591 transitions. [2021-08-06 14:51:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:51:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:51:59,057 INFO L225 Difference]: With dead ends: 4019 [2021-08-06 14:51:59,057 INFO L226 Difference]: Without dead ends: 3991 [2021-08-06 14:51:59,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:51:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3991 states. [2021-08-06 14:51:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3991 to 3411. [2021-08-06 14:51:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 4.174193548387096) internal successors, (14234), 3410 states have internal predecessors, (14234), 0 states have call successors, (0), 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 14:51:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 14234 transitions. [2021-08-06 14:51:59,116 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 14234 transitions. Word has length 23 [2021-08-06 14:51:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:51:59,116 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 14234 transitions. [2021-08-06 14:51:59,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:51:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 14234 transitions. [2021-08-06 14:51:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:51:59,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:51:59,122 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:51:59,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 14:51:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:59,323 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:51:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:51:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash 632717906, now seen corresponding path program 20 times [2021-08-06 14:51:59,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:51:59,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688511647] [2021-08-06 14:51:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:51:59,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:51:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:51:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:51:59,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:51:59,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688511647] [2021-08-06 14:51:59,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688511647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:51:59,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430765950] [2021-08-06 14:51:59,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:51:59,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:51:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:51:59,575 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:51:59,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:52:03,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:52:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:03,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430765950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:03,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272650584] [2021-08-06 14:52:03,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:03,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:03,719 INFO L87 Difference]: Start difference. First operand 3411 states and 14234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:04,510 INFO L93 Difference]: Finished difference Result 4073 states and 16821 transitions. [2021-08-06 14:52:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:52:04,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:04,520 INFO L225 Difference]: With dead ends: 4073 [2021-08-06 14:52:04,520 INFO L226 Difference]: Without dead ends: 4050 [2021-08-06 14:52:04,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:52:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2021-08-06 14:52:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 3401. [2021-08-06 14:52:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 4.175588235294118) internal successors, (14197), 3400 states have internal predecessors, (14197), 0 states have call successors, (0), 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 14:52:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 14197 transitions. [2021-08-06 14:52:04,578 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 14197 transitions. Word has length 23 [2021-08-06 14:52:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:04,578 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 14197 transitions. [2021-08-06 14:52:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 14197 transitions. [2021-08-06 14:52:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:04,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:04,584 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:04,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 14:52:04,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:04,785 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1039608366, now seen corresponding path program 21 times [2021-08-06 14:52:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:04,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60770059] [2021-08-06 14:52:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:04,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:04,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:04,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60770059] [2021-08-06 14:52:04,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60770059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:04,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809022801] [2021-08-06 14:52:04,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:52:04,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:04,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:04,964 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:52:08,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:52:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:08,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:08,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:52:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:09,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809022801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:09,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:09,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:09,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785022579] [2021-08-06 14:52:09,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:09,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:09,098 INFO L87 Difference]: Start difference. First operand 3401 states and 14197 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:09,583 INFO L93 Difference]: Finished difference Result 3879 states and 16058 transitions. [2021-08-06 14:52:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:52:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:09,592 INFO L225 Difference]: With dead ends: 3879 [2021-08-06 14:52:09,592 INFO L226 Difference]: Without dead ends: 3845 [2021-08-06 14:52:09,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:52:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2021-08-06 14:52:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 3422. [2021-08-06 14:52:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 4.1742180648933065) internal successors, (14280), 3421 states have internal predecessors, (14280), 0 states have call successors, (0), 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 14:52:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 14280 transitions. [2021-08-06 14:52:09,651 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 14280 transitions. Word has length 23 [2021-08-06 14:52:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 14280 transitions. [2021-08-06 14:52:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 14280 transitions. [2021-08-06 14:52:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:09,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:09,657 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:09,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 14:52:09,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-06 14:52:09,858 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1926661510, now seen corresponding path program 22 times [2021-08-06 14:52:09,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:09,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730290477] [2021-08-06 14:52:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:09,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:10,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:10,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730290477] [2021-08-06 14:52:10,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730290477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:10,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426438430] [2021-08-06 14:52:10,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:52:10,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:10,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:10,039 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:10,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:52:13,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:52:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:13,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:52:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:14,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426438430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:14,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:14,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:14,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501302396] [2021-08-06 14:52:14,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:14,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:14,207 INFO L87 Difference]: Start difference. First operand 3422 states and 14280 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:14,929 INFO L93 Difference]: Finished difference Result 4084 states and 16851 transitions. [2021-08-06 14:52:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:52:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:14,939 INFO L225 Difference]: With dead ends: 4084 [2021-08-06 14:52:14,939 INFO L226 Difference]: Without dead ends: 4053 [2021-08-06 14:52:14,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:52:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-08-06 14:52:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3428. [2021-08-06 14:52:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 4.175080245112343) internal successors, (14308), 3427 states have internal predecessors, (14308), 0 states have call successors, (0), 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 14:52:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 14308 transitions. [2021-08-06 14:52:14,999 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 14308 transitions. Word has length 23 [2021-08-06 14:52:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:14,999 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 14308 transitions. [2021-08-06 14:52:14,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 14308 transitions. [2021-08-06 14:52:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:15,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:15,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:15,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-06 14:52:15,205 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:15,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1780560464, now seen corresponding path program 23 times [2021-08-06 14:52:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:15,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465448409] [2021-08-06 14:52:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:15,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:15,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:15,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465448409] [2021-08-06 14:52:15,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465448409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:15,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275334271] [2021-08-06 14:52:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:52:15,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:15,390 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:15,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:52:19,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:52:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:52:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:19,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-08-06 14:52:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:19,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275334271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:19,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:19,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:52:19,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630504755] [2021-08-06 14:52:19,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:52:19,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:52:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:52:19,447 INFO L87 Difference]: Start difference. First operand 3428 states and 14308 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:52:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:19,957 INFO L93 Difference]: Finished difference Result 3926 states and 16222 transitions. [2021-08-06 14:52:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:52:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 14:52:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:19,967 INFO L225 Difference]: With dead ends: 3926 [2021-08-06 14:52:19,967 INFO L226 Difference]: Without dead ends: 3898 [2021-08-06 14:52:19,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:52:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-08-06 14:52:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3434. [2021-08-06 14:52:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 4.174774249927178) internal successors, (14332), 3433 states have internal predecessors, (14332), 0 states have call successors, (0), 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 14:52:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 14332 transitions. [2021-08-06 14:52:20,036 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 14332 transitions. Word has length 23 [2021-08-06 14:52:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:20,036 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 14332 transitions. [2021-08-06 14:52:20,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:52:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 14332 transitions. [2021-08-06 14:52:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:20,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:20,043 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:20,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 14:52:20,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:20,244 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash -704849308, now seen corresponding path program 24 times [2021-08-06 14:52:20,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:20,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013965575] [2021-08-06 14:52:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:20,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:20,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:20,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013965575] [2021-08-06 14:52:20,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013965575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:20,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508018616] [2021-08-06 14:52:20,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:52:20,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:20,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:20,443 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:20,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:52:24,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:52:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:24,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:24,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:24,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:24,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508018616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:24,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:24,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:24,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077221867] [2021-08-06 14:52:24,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:24,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:24,654 INFO L87 Difference]: Start difference. First operand 3434 states and 14332 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:25,384 INFO L93 Difference]: Finished difference Result 3985 states and 16472 transitions. [2021-08-06 14:52:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:52:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:25,394 INFO L225 Difference]: With dead ends: 3985 [2021-08-06 14:52:25,394 INFO L226 Difference]: Without dead ends: 3962 [2021-08-06 14:52:25,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:52:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2021-08-06 14:52:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3422. [2021-08-06 14:52:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 4.1742180648933065) internal successors, (14280), 3421 states have internal predecessors, (14280), 0 states have call successors, (0), 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 14:52:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 14280 transitions. [2021-08-06 14:52:25,455 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 14280 transitions. Word has length 23 [2021-08-06 14:52:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:25,456 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 14280 transitions. [2021-08-06 14:52:25,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 14280 transitions. [2021-08-06 14:52:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:25,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:25,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:25,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 14:52:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:25,663 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:25,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2138463418, now seen corresponding path program 25 times [2021-08-06 14:52:25,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:25,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408193565] [2021-08-06 14:52:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:25,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:25,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:25,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408193565] [2021-08-06 14:52:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408193565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:25,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227313147] [2021-08-06 14:52:25,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:52:25,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:25,879 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:25,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:52:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:29,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:52:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:30,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227313147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:30,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:30,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596379698] [2021-08-06 14:52:30,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:30,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:30,107 INFO L87 Difference]: Start difference. First operand 3422 states and 14280 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:30,740 INFO L93 Difference]: Finished difference Result 4189 states and 17304 transitions. [2021-08-06 14:52:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:52:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:30,750 INFO L225 Difference]: With dead ends: 4189 [2021-08-06 14:52:30,750 INFO L226 Difference]: Without dead ends: 4165 [2021-08-06 14:52:30,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:52:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-08-06 14:52:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3440. [2021-08-06 14:52:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 4.177377144518755) internal successors, (14366), 3439 states have internal predecessors, (14366), 0 states have call successors, (0), 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 14:52:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 14366 transitions. [2021-08-06 14:52:30,812 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 14366 transitions. Word has length 23 [2021-08-06 14:52:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 14366 transitions. [2021-08-06 14:52:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 14366 transitions. [2021-08-06 14:52:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:30,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:30,818 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:30,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 14:52:31,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:31,019 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1250342918, now seen corresponding path program 26 times [2021-08-06 14:52:31,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:31,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88459498] [2021-08-06 14:52:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:31,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:31,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:31,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88459498] [2021-08-06 14:52:31,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88459498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:31,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181097330] [2021-08-06 14:52:31,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:52:31,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:31,204 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:52:34,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:52:34,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:34,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:35,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:35,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181097330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:35,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68878185] [2021-08-06 14:52:35,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:35,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:35,517 INFO L87 Difference]: Start difference. First operand 3440 states and 14366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:36,337 INFO L93 Difference]: Finished difference Result 4044 states and 16708 transitions. [2021-08-06 14:52:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:52:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:36,348 INFO L225 Difference]: With dead ends: 4044 [2021-08-06 14:52:36,348 INFO L226 Difference]: Without dead ends: 4016 [2021-08-06 14:52:36,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 676.7ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:52:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-08-06 14:52:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3446. [2021-08-06 14:52:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 4.177068214804064) internal successors, (14390), 3445 states have internal predecessors, (14390), 0 states have call successors, (0), 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 14:52:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 14390 transitions. [2021-08-06 14:52:36,410 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 14390 transitions. Word has length 23 [2021-08-06 14:52:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 14390 transitions. [2021-08-06 14:52:36,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 14390 transitions. [2021-08-06 14:52:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:36,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:36,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:36,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 14:52:36,620 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1968913222, now seen corresponding path program 27 times [2021-08-06 14:52:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:36,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940821427] [2021-08-06 14:52:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:36,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:36,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:36,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940821427] [2021-08-06 14:52:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940821427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:36,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391182595] [2021-08-06 14:52:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:52:36,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:36,814 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:36,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:52:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:52:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:40,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:40,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:40,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:41,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391182595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:41,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:41,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:41,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915691081] [2021-08-06 14:52:41,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:41,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:41,205 INFO L87 Difference]: Start difference. First operand 3446 states and 14390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:41,925 INFO L93 Difference]: Finished difference Result 3978 states and 16459 transitions. [2021-08-06 14:52:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:52:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:41,935 INFO L225 Difference]: With dead ends: 3978 [2021-08-06 14:52:41,935 INFO L226 Difference]: Without dead ends: 3955 [2021-08-06 14:52:41,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:52:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-08-06 14:52:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3434. [2021-08-06 14:52:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 4.1768132828429945) internal successors, (14339), 3433 states have internal predecessors, (14339), 0 states have call successors, (0), 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 14:52:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 14339 transitions. [2021-08-06 14:52:41,992 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 14339 transitions. Word has length 23 [2021-08-06 14:52:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:41,992 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 14339 transitions. [2021-08-06 14:52:41,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 14339 transitions. [2021-08-06 14:52:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:42,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:42,000 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:42,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 14:52:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:52:42,225 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1991295016, now seen corresponding path program 28 times [2021-08-06 14:52:42,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:42,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307331185] [2021-08-06 14:52:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:42,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:42,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307331185] [2021-08-06 14:52:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307331185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350930306] [2021-08-06 14:52:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:52:42,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:42,412 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:42,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:52:46,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:52:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:46,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:52:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:46,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350930306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:46,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:46,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:46,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831790199] [2021-08-06 14:52:46,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:46,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:46,820 INFO L87 Difference]: Start difference. First operand 3434 states and 14339 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:47,725 INFO L93 Difference]: Finished difference Result 4352 states and 17925 transitions. [2021-08-06 14:52:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:52:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:47,737 INFO L225 Difference]: With dead ends: 4352 [2021-08-06 14:52:47,738 INFO L226 Difference]: Without dead ends: 4321 [2021-08-06 14:52:47,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:52:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-08-06 14:52:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3440. [2021-08-06 14:52:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 4.177667926722885) internal successors, (14367), 3439 states have internal predecessors, (14367), 0 states have call successors, (0), 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 14:52:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 14367 transitions. [2021-08-06 14:52:47,810 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 14367 transitions. Word has length 23 [2021-08-06 14:52:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:47,810 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 14367 transitions. [2021-08-06 14:52:47,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 14367 transitions. [2021-08-06 14:52:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:47,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:47,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:47,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 14:52:48,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:52:48,018 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1715926958, now seen corresponding path program 29 times [2021-08-06 14:52:48,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:48,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794790000] [2021-08-06 14:52:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:48,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:48,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794790000] [2021-08-06 14:52:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794790000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:48,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633030227] [2021-08-06 14:52:48,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:52:48,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:48,220 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:52:52,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:52:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:52,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:52,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:52,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633030227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:52,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:52,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:52,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164270387] [2021-08-06 14:52:52,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:52,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:52,794 INFO L87 Difference]: Start difference. First operand 3440 states and 14367 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:53,777 INFO L93 Difference]: Finished difference Result 4090 states and 16883 transitions. [2021-08-06 14:52:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:52:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:53,788 INFO L225 Difference]: With dead ends: 4090 [2021-08-06 14:52:53,788 INFO L226 Difference]: Without dead ends: 4062 [2021-08-06 14:52:53,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:52:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2021-08-06 14:52:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 3446. [2021-08-06 14:52:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 4.1773584905660375) internal successors, (14391), 3445 states have internal predecessors, (14391), 0 states have call successors, (0), 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 14:52:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 14391 transitions. [2021-08-06 14:52:53,857 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 14391 transitions. Word has length 23 [2021-08-06 14:52:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:53,857 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 14391 transitions. [2021-08-06 14:52:53,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 14391 transitions. [2021-08-06 14:52:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:53,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:53,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:53,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 14:52:54,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:54,066 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash -640215802, now seen corresponding path program 30 times [2021-08-06 14:52:54,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:54,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232755] [2021-08-06 14:52:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:54,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:52:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:52:54,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232755] [2021-08-06 14:52:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:54,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31572624] [2021-08-06 14:52:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:52:54,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:52:54,255 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:52:54,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:52:58,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:52:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:52:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:52:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:52:58,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:52:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:52:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:52:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31572624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:52:58,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:52:58,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:52:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883063431] [2021-08-06 14:52:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:52:58,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:52:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:52:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:52:58,824 INFO L87 Difference]: Start difference. First operand 3446 states and 14391 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:52:59,562 INFO L93 Difference]: Finished difference Result 4008 states and 16580 transitions. [2021-08-06 14:52:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:52:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:52:59,573 INFO L225 Difference]: With dead ends: 4008 [2021-08-06 14:52:59,573 INFO L226 Difference]: Without dead ends: 3985 [2021-08-06 14:52:59,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:52:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2021-08-06 14:52:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3428. [2021-08-06 14:52:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 4.175080245112343) internal successors, (14308), 3427 states have internal predecessors, (14308), 0 states have call successors, (0), 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 14:52:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 14308 transitions. [2021-08-06 14:52:59,636 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 14308 transitions. Word has length 23 [2021-08-06 14:52:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:52:59,637 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 14308 transitions. [2021-08-06 14:52:59,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:52:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 14308 transitions. [2021-08-06 14:52:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:52:59,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:52:59,643 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:52:59,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 14:52:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:52:59,845 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:52:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:52:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash 44075248, now seen corresponding path program 31 times [2021-08-06 14:52:59,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:52:59,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355451522] [2021-08-06 14:52:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:52:59,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:52:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:00,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355451522] [2021-08-06 14:53:00,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355451522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:00,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835556792] [2021-08-06 14:53:00,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:53:00,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:00,044 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:00,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:53:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:04,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:53:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:04,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835556792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:04,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:04,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:04,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187834384] [2021-08-06 14:53:04,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:04,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:04,560 INFO L87 Difference]: Start difference. First operand 3428 states and 14308 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:05,137 INFO L93 Difference]: Finished difference Result 4003 states and 16565 transitions. [2021-08-06 14:53:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:53:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:05,147 INFO L225 Difference]: With dead ends: 4003 [2021-08-06 14:53:05,147 INFO L226 Difference]: Without dead ends: 3979 [2021-08-06 14:53:05,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:53:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-08-06 14:53:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3440. [2021-08-06 14:53:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 4.1753416690898515) internal successors, (14359), 3439 states have internal predecessors, (14359), 0 states have call successors, (0), 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 14:53:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 14359 transitions. [2021-08-06 14:53:05,206 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 14359 transitions. Word has length 23 [2021-08-06 14:53:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:05,206 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 14359 transitions. [2021-08-06 14:53:05,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 14359 transitions. [2021-08-06 14:53:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:05,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:05,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:05,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 14:53:05,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 14:53:05,417 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash -862085712, now seen corresponding path program 32 times [2021-08-06 14:53:05,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:05,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527318205] [2021-08-06 14:53:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:05,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:05,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:05,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527318205] [2021-08-06 14:53:05,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527318205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:05,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270364261] [2021-08-06 14:53:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:53:05,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:05,665 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:05,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:53:09,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:53:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:09,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:09,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:53:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270364261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:10,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144378182] [2021-08-06 14:53:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:10,230 INFO L87 Difference]: Start difference. First operand 3440 states and 14359 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:11,013 INFO L93 Difference]: Finished difference Result 3953 states and 16340 transitions. [2021-08-06 14:53:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:53:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:11,023 INFO L225 Difference]: With dead ends: 3953 [2021-08-06 14:53:11,023 INFO L226 Difference]: Without dead ends: 3925 [2021-08-06 14:53:11,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:53:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-08-06 14:53:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3446. [2021-08-06 14:53:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 4.175036284470247) internal successors, (14383), 3445 states have internal predecessors, (14383), 0 states have call successors, (0), 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 14:53:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 14383 transitions. [2021-08-06 14:53:11,080 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 14383 transitions. Word has length 23 [2021-08-06 14:53:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:11,080 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 14383 transitions. [2021-08-06 14:53:11,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 14383 transitions. [2021-08-06 14:53:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:11,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:11,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:11,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:53:11,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 14:53:11,289 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash 213625444, now seen corresponding path program 33 times [2021-08-06 14:53:11,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:11,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268707585] [2021-08-06 14:53:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:11,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:11,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268707585] [2021-08-06 14:53:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268707585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365749760] [2021-08-06 14:53:11,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:53:11,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:11,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:11,493 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:11,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:53:15,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:53:15,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:15,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:53:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365749760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:16,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:16,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:16,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318262288] [2021-08-06 14:53:16,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:16,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:16,197 INFO L87 Difference]: Start difference. First operand 3446 states and 14383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:16,900 INFO L93 Difference]: Finished difference Result 3851 states and 15955 transitions. [2021-08-06 14:53:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:53:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:16,909 INFO L225 Difference]: With dead ends: 3851 [2021-08-06 14:53:16,909 INFO L226 Difference]: Without dead ends: 3828 [2021-08-06 14:53:16,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:53:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-08-06 14:53:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 3434. [2021-08-06 14:53:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 4.174774249927178) internal successors, (14332), 3433 states have internal predecessors, (14332), 0 states have call successors, (0), 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 14:53:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 14332 transitions. [2021-08-06 14:53:16,967 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 14332 transitions. Word has length 23 [2021-08-06 14:53:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:16,967 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 14332 transitions. [2021-08-06 14:53:16,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 14332 transitions. [2021-08-06 14:53:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:16,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:16,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:53:17,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:17,174 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1284622172, now seen corresponding path program 34 times [2021-08-06 14:53:17,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:17,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040858982] [2021-08-06 14:53:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:17,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:17,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:17,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040858982] [2021-08-06 14:53:17,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040858982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:17,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048755136] [2021-08-06 14:53:17,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:53:17,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:17,343 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:17,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:53:21,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:53:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:21,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:53:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048755136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:21,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:21,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:21,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815327457] [2021-08-06 14:53:21,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:21,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:21,961 INFO L87 Difference]: Start difference. First operand 3434 states and 14332 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:22,439 INFO L93 Difference]: Finished difference Result 3854 states and 15970 transitions. [2021-08-06 14:53:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:53:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:22,448 INFO L225 Difference]: With dead ends: 3854 [2021-08-06 14:53:22,449 INFO L226 Difference]: Without dead ends: 3829 [2021-08-06 14:53:22,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:53:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-08-06 14:53:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3426. [2021-08-06 14:53:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 4.175766423357664) internal successors, (14302), 3425 states have internal predecessors, (14302), 0 states have call successors, (0), 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 14:53:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 14302 transitions. [2021-08-06 14:53:22,506 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 14302 transitions. Word has length 23 [2021-08-06 14:53:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:22,506 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 14302 transitions. [2021-08-06 14:53:22,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 14302 transitions. [2021-08-06 14:53:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:22,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:22,512 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, 1] [2021-08-06 14:53:22,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:53:22,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:22,712 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1577602254, now seen corresponding path program 16 times [2021-08-06 14:53:22,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:22,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310900113] [2021-08-06 14:53:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:22,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:22,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:22,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310900113] [2021-08-06 14:53:22,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310900113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:22,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048954363] [2021-08-06 14:53:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:53:22,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:22,904 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:53:27,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:53:27,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:27,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:27,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:53:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:27,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048954363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:27,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:27,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:27,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176066772] [2021-08-06 14:53:27,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:27,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:27,617 INFO L87 Difference]: Start difference. First operand 3426 states and 14302 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:28,134 INFO L93 Difference]: Finished difference Result 3604 states and 14964 transitions. [2021-08-06 14:53:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:53:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:28,143 INFO L225 Difference]: With dead ends: 3604 [2021-08-06 14:53:28,143 INFO L226 Difference]: Without dead ends: 3589 [2021-08-06 14:53:28,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:53:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-08-06 14:53:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 3426. [2021-08-06 14:53:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 4.175766423357664) internal successors, (14302), 3425 states have internal predecessors, (14302), 0 states have call successors, (0), 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 14:53:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 14302 transitions. [2021-08-06 14:53:28,198 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 14302 transitions. Word has length 23 [2021-08-06 14:53:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:28,198 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 14302 transitions. [2021-08-06 14:53:28,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 14302 transitions. [2021-08-06 14:53:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:28,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:28,204 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, 1] [2021-08-06 14:53:28,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 14:53:28,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-06 14:53:28,405 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1127056206, now seen corresponding path program 17 times [2021-08-06 14:53:28,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:28,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288986177] [2021-08-06 14:53:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:28,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:28,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:28,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288986177] [2021-08-06 14:53:28,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288986177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:28,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831422112] [2021-08-06 14:53:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:53:28,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:28,616 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:53:32,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:53:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:33,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:33,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:53:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831422112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:33,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196829527] [2021-08-06 14:53:33,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:33,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:33,382 INFO L87 Difference]: Start difference. First operand 3426 states and 14302 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:34,158 INFO L93 Difference]: Finished difference Result 3589 states and 14908 transitions. [2021-08-06 14:53:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:53:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:34,167 INFO L225 Difference]: With dead ends: 3589 [2021-08-06 14:53:34,167 INFO L226 Difference]: Without dead ends: 3567 [2021-08-06 14:53:34,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 703.0ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:53:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-08-06 14:53:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3418. [2021-08-06 14:53:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 4.175592625109745) internal successors, (14268), 3417 states have internal predecessors, (14268), 0 states have call successors, (0), 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 14:53:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 14268 transitions. [2021-08-06 14:53:34,222 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 14268 transitions. Word has length 23 [2021-08-06 14:53:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:34,222 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 14268 transitions. [2021-08-06 14:53:34,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 14268 transitions. [2021-08-06 14:53:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:34,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:34,229 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, 1] [2021-08-06 14:53:34,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 14:53:34,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 14:53:34,429 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1557952640, now seen corresponding path program 18 times [2021-08-06 14:53:34,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:34,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26594961] [2021-08-06 14:53:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:34,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:34,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:34,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26594961] [2021-08-06 14:53:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26594961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:34,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031895329] [2021-08-06 14:53:34,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:53:34,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:34,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:34,623 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:34,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:53:38,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:53:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 14:53:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:39,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:53:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:53:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:53:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:53:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-08-06 14:53:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:39,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031895329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:39,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:39,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:53:39,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115261894] [2021-08-06 14:53:39,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:53:39,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:53:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:53:39,369 INFO L87 Difference]: Start difference. First operand 3418 states and 14268 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:53:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:39,919 INFO L93 Difference]: Finished difference Result 3803 states and 15727 transitions. [2021-08-06 14:53:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:53:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:53:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:39,928 INFO L225 Difference]: With dead ends: 3803 [2021-08-06 14:53:39,928 INFO L226 Difference]: Without dead ends: 3768 [2021-08-06 14:53:39,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:53:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-08-06 14:53:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3466. [2021-08-06 14:53:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 3465 states have (on average 4.185281385281385) internal successors, (14502), 3465 states have internal predecessors, (14502), 0 states have call successors, (0), 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 14:53:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 14502 transitions. [2021-08-06 14:53:40,016 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 14502 transitions. Word has length 23 [2021-08-06 14:53:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:40,016 INFO L470 AbstractCegarLoop]: Abstraction has 3466 states and 14502 transitions. [2021-08-06 14:53:40,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:53:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 14502 transitions. [2021-08-06 14:53:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:40,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:40,022 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, 1] [2021-08-06 14:53:40,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 14:53:40,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:53:40,223 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash -894016338, now seen corresponding path program 19 times [2021-08-06 14:53:40,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:40,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400356539] [2021-08-06 14:53:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:40,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:40,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:40,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400356539] [2021-08-06 14:53:40,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400356539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:40,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336996632] [2021-08-06 14:53:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:53:40,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:40,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:40,418 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:53:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:53:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:44,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:53:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:45,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336996632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:45,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:45,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:53:45,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26200884] [2021-08-06 14:53:45,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:53:45,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:53:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:53:45,170 INFO L87 Difference]: Start difference. First operand 3466 states and 14502 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:45,694 INFO L93 Difference]: Finished difference Result 3681 states and 15316 transitions. [2021-08-06 14:53:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:53:45,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:45,703 INFO L225 Difference]: With dead ends: 3681 [2021-08-06 14:53:45,703 INFO L226 Difference]: Without dead ends: 3666 [2021-08-06 14:53:45,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:53:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-08-06 14:53:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3470. [2021-08-06 14:53:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 4.185644277889882) internal successors, (14520), 3469 states have internal predecessors, (14520), 0 states have call successors, (0), 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 14:53:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 14520 transitions. [2021-08-06 14:53:45,765 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 14520 transitions. Word has length 23 [2021-08-06 14:53:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:45,765 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 14520 transitions. [2021-08-06 14:53:45,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:53:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 14520 transitions. [2021-08-06 14:53:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:45,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:45,772 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, 1] [2021-08-06 14:53:45,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:45,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:53:45,972 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1315950606, now seen corresponding path program 20 times [2021-08-06 14:53:45,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:45,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887124297] [2021-08-06 14:53:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:45,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:46,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:46,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887124297] [2021-08-06 14:53:46,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887124297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:46,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996590131] [2021-08-06 14:53:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:53:46,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:46,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:46,221 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:46,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:53:50,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:53:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:53:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:50,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:53:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-08-06 14:53:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:50,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996590131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:50,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:50,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:53:50,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574872946] [2021-08-06 14:53:50,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:53:50,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:53:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:53:50,847 INFO L87 Difference]: Start difference. First operand 3470 states and 14520 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:53:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:51,297 INFO L93 Difference]: Finished difference Result 3702 states and 15392 transitions. [2021-08-06 14:53:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:53:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:53:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:51,306 INFO L225 Difference]: With dead ends: 3702 [2021-08-06 14:53:51,306 INFO L226 Difference]: Without dead ends: 3687 [2021-08-06 14:53:51,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:53:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-08-06 14:53:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3478. [2021-08-06 14:53:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 4.185792349726776) internal successors, (14554), 3477 states have internal predecessors, (14554), 0 states have call successors, (0), 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 14:53:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 14554 transitions. [2021-08-06 14:53:51,363 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 14554 transitions. Word has length 23 [2021-08-06 14:53:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:51,363 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 14554 transitions. [2021-08-06 14:53:51,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:53:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 14554 transitions. [2021-08-06 14:53:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:51,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:51,369 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, 1] [2021-08-06 14:53:51,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:51,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 14:53:51,570 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2072855730, now seen corresponding path program 21 times [2021-08-06 14:53:51,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:51,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837810588] [2021-08-06 14:53:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:51,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:51,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:51,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837810588] [2021-08-06 14:53:51,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837810588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:51,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891945378] [2021-08-06 14:53:51,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:53:51,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:51,766 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:53:56,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:53:56,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:53:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:53:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:53:56,321 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-08-06 14:53:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2021-08-06 14:53:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:56,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891945378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:56,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:53:56,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:53:56,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40983162] [2021-08-06 14:53:56,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:53:56,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:53:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:53:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:53:56,560 INFO L87 Difference]: Start difference. First operand 3478 states and 14554 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:53:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:53:57,163 INFO L93 Difference]: Finished difference Result 3850 states and 15989 transitions. [2021-08-06 14:53:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:53:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 14:53:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:53:57,173 INFO L225 Difference]: With dead ends: 3850 [2021-08-06 14:53:57,173 INFO L226 Difference]: Without dead ends: 3829 [2021-08-06 14:53:57,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:53:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-08-06 14:53:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3482. [2021-08-06 14:53:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3481 states have (on average 4.1855788566503875) internal successors, (14570), 3481 states have internal predecessors, (14570), 0 states have call successors, (0), 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 14:53:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 14570 transitions. [2021-08-06 14:53:57,229 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 14570 transitions. Word has length 23 [2021-08-06 14:53:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:53:57,229 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 14570 transitions. [2021-08-06 14:53:57,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:53:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 14570 transitions. [2021-08-06 14:53:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:53:57,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:53:57,235 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, 1] [2021-08-06 14:53:57,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 14:53:57,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-06 14:53:57,436 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:53:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:53:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1146400410, now seen corresponding path program 22 times [2021-08-06 14:53:57,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:53:57,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598547056] [2021-08-06 14:53:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:53:57,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:53:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:53:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:53:57,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:53:57,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598547056] [2021-08-06 14:53:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598547056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:53:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359727482] [2021-08-06 14:53:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:53:57,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:53:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:53:57,682 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:53:57,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:54:02,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:54:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:02,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:02,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359727482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:02,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769614043] [2021-08-06 14:54:02,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:02,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:02,630 INFO L87 Difference]: Start difference. First operand 3482 states and 14570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:03,322 INFO L93 Difference]: Finished difference Result 3699 states and 15378 transitions. [2021-08-06 14:54:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:54:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:03,332 INFO L225 Difference]: With dead ends: 3699 [2021-08-06 14:54:03,332 INFO L226 Difference]: Without dead ends: 3684 [2021-08-06 14:54:03,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:54:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-08-06 14:54:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3474. [2021-08-06 14:54:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 3473 states have (on average 4.185430463576159) internal successors, (14536), 3473 states have internal predecessors, (14536), 0 states have call successors, (0), 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 14:54:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 14536 transitions. [2021-08-06 14:54:03,390 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 14536 transitions. Word has length 23 [2021-08-06 14:54:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:03,390 INFO L470 AbstractCegarLoop]: Abstraction has 3474 states and 14536 transitions. [2021-08-06 14:54:03,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 14536 transitions. [2021-08-06 14:54:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:03,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:03,396 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, 1] [2021-08-06 14:54:03,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:03,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 14:54:03,597 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1650319270, now seen corresponding path program 23 times [2021-08-06 14:54:03,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:03,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866708470] [2021-08-06 14:54:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:03,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:03,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:03,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866708470] [2021-08-06 14:54:03,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866708470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:03,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689880755] [2021-08-06 14:54:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:54:03,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:03,821 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:03,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:54:08,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:54:08,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:08,596 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 14:54:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 74 [2021-08-06 14:54:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:08,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689880755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:08,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:08,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:54:08,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51270817] [2021-08-06 14:54:08,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:54:08,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:54:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:54:08,901 INFO L87 Difference]: Start difference. First operand 3474 states and 14536 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:54:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:09,873 INFO L93 Difference]: Finished difference Result 3963 states and 16433 transitions. [2021-08-06 14:54:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:54:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:54:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:09,884 INFO L225 Difference]: With dead ends: 3963 [2021-08-06 14:54:09,884 INFO L226 Difference]: Without dead ends: 3937 [2021-08-06 14:54:09,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:54:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-08-06 14:54:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3512. [2021-08-06 14:54:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 3511 states have (on average 4.189404727997721) internal successors, (14709), 3511 states have internal predecessors, (14709), 0 states have call successors, (0), 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 14:54:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 14709 transitions. [2021-08-06 14:54:09,941 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 14709 transitions. Word has length 23 [2021-08-06 14:54:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:09,941 INFO L470 AbstractCegarLoop]: Abstraction has 3512 states and 14709 transitions. [2021-08-06 14:54:09,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:54:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 14709 transitions. [2021-08-06 14:54:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:09,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:09,947 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, 1] [2021-08-06 14:54:09,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:54:10,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 14:54:10,148 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1104393394, now seen corresponding path program 24 times [2021-08-06 14:54:10,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:10,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125417450] [2021-08-06 14:54:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:10,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:10,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:10,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125417450] [2021-08-06 14:54:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125417450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:10,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506467480] [2021-08-06 14:54:10,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:54:10,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:10,361 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:10,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:54:14,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:54:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:15,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:54:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:15,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506467480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:15,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:15,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:15,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195016174] [2021-08-06 14:54:15,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:15,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:15,430 INFO L87 Difference]: Start difference. First operand 3512 states and 14709 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:16,021 INFO L93 Difference]: Finished difference Result 3741 states and 15579 transitions. [2021-08-06 14:54:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:54:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:16,031 INFO L225 Difference]: With dead ends: 3741 [2021-08-06 14:54:16,031 INFO L226 Difference]: Without dead ends: 3726 [2021-08-06 14:54:16,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:54:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2021-08-06 14:54:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 3520. [2021-08-06 14:54:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 4.189826655299801) internal successors, (14744), 3519 states have internal predecessors, (14744), 0 states have call successors, (0), 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 14:54:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 14744 transitions. [2021-08-06 14:54:16,093 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 14744 transitions. Word has length 23 [2021-08-06 14:54:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:16,093 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 14744 transitions. [2021-08-06 14:54:16,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 14744 transitions. [2021-08-06 14:54:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:16,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:16,100 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, 1] [2021-08-06 14:54:16,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 14:54:16,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:16,301 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:16,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1689727346, now seen corresponding path program 25 times [2021-08-06 14:54:16,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:16,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065199727] [2021-08-06 14:54:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:16,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:16,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:16,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065199727] [2021-08-06 14:54:16,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065199727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:16,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719142989] [2021-08-06 14:54:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:54:16,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:16,514 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:16,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:54:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:21,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:21,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719142989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:21,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:21,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058292790] [2021-08-06 14:54:21,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:21,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:21,565 INFO L87 Difference]: Start difference. First operand 3520 states and 14744 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:22,252 INFO L93 Difference]: Finished difference Result 3711 states and 15461 transitions. [2021-08-06 14:54:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:54:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:22,261 INFO L225 Difference]: With dead ends: 3711 [2021-08-06 14:54:22,261 INFO L226 Difference]: Without dead ends: 3689 [2021-08-06 14:54:22,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:54:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2021-08-06 14:54:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 3524. [2021-08-06 14:54:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.189611126880499) internal successors, (14760), 3523 states have internal predecessors, (14760), 0 states have call successors, (0), 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 14:54:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 14760 transitions. [2021-08-06 14:54:22,321 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 14760 transitions. Word has length 23 [2021-08-06 14:54:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:22,321 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 14760 transitions. [2021-08-06 14:54:22,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 14760 transitions. [2021-08-06 14:54:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:22,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:22,327 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, 1] [2021-08-06 14:54:22,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 14:54:22,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:22,528 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -991673216, now seen corresponding path program 26 times [2021-08-06 14:54:22,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:22,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844565981] [2021-08-06 14:54:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:22,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:22,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:22,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844565981] [2021-08-06 14:54:22,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844565981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:22,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74349671] [2021-08-06 14:54:22,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:54:22,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:22,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:22,741 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:22,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:54:27,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:54:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:27,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:27,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74349671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:27,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:27,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:27,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715028495] [2021-08-06 14:54:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:27,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:27,811 INFO L87 Difference]: Start difference. First operand 3524 states and 14760 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:28,477 INFO L93 Difference]: Finished difference Result 3681 states and 15344 transitions. [2021-08-06 14:54:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:54:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:28,486 INFO L225 Difference]: With dead ends: 3681 [2021-08-06 14:54:28,486 INFO L226 Difference]: Without dead ends: 3666 [2021-08-06 14:54:28,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:54:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-08-06 14:54:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3516. [2021-08-06 14:54:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3516 states, 3515 states have (on average 4.189473684210526) internal successors, (14726), 3515 states have internal predecessors, (14726), 0 states have call successors, (0), 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 14:54:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 14726 transitions. [2021-08-06 14:54:28,545 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 14726 transitions. Word has length 23 [2021-08-06 14:54:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:28,546 INFO L470 AbstractCegarLoop]: Abstraction has 3516 states and 14726 transitions. [2021-08-06 14:54:28,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 14726 transitions. [2021-08-06 14:54:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:28,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:28,552 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, 1] [2021-08-06 14:54:28,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:28,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:28,753 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash 877172014, now seen corresponding path program 27 times [2021-08-06 14:54:28,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:28,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864311100] [2021-08-06 14:54:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:28,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:28,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:28,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864311100] [2021-08-06 14:54:28,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864311100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:28,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41221749] [2021-08-06 14:54:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:54:28,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:28,952 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:28,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:54:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:54:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:33,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:54:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:33,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41221749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:33,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:33,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:33,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131298251] [2021-08-06 14:54:33,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:33,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:33,970 INFO L87 Difference]: Start difference. First operand 3516 states and 14726 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:34,459 INFO L93 Difference]: Finished difference Result 3756 states and 15635 transitions. [2021-08-06 14:54:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:54:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:34,468 INFO L225 Difference]: With dead ends: 3756 [2021-08-06 14:54:34,468 INFO L226 Difference]: Without dead ends: 3741 [2021-08-06 14:54:34,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:54:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2021-08-06 14:54:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3520. [2021-08-06 14:54:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 4.189826655299801) internal successors, (14744), 3519 states have internal predecessors, (14744), 0 states have call successors, (0), 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 14:54:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 14744 transitions. [2021-08-06 14:54:34,527 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 14744 transitions. Word has length 23 [2021-08-06 14:54:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:34,527 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 14744 transitions. [2021-08-06 14:54:34,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 14744 transitions. [2021-08-06 14:54:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:34,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:34,534 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, 1] [2021-08-06 14:54:34,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:34,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:34,735 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1390698866, now seen corresponding path program 28 times [2021-08-06 14:54:34,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:34,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598595102] [2021-08-06 14:54:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:34,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:35,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:35,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598595102] [2021-08-06 14:54:35,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598595102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:35,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513156641] [2021-08-06 14:54:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:54:35,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:35,019 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:35,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:54:39,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:54:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:39,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:39,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:40,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513156641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:40,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:40,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:40,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033081219] [2021-08-06 14:54:40,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:40,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:40,086 INFO L87 Difference]: Start difference. First operand 3520 states and 14744 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:40,808 INFO L93 Difference]: Finished difference Result 3716 states and 15482 transitions. [2021-08-06 14:54:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:54:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:40,817 INFO L225 Difference]: With dead ends: 3716 [2021-08-06 14:54:40,817 INFO L226 Difference]: Without dead ends: 3695 [2021-08-06 14:54:40,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:54:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-08-06 14:54:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3524. [2021-08-06 14:54:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.189611126880499) internal successors, (14760), 3523 states have internal predecessors, (14760), 0 states have call successors, (0), 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 14:54:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 14760 transitions. [2021-08-06 14:54:40,876 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 14760 transitions. Word has length 23 [2021-08-06 14:54:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:40,876 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 14760 transitions. [2021-08-06 14:54:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 14760 transitions. [2021-08-06 14:54:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:40,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:40,883 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, 1] [2021-08-06 14:54:40,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:41,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:54:41,083 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1828557274, now seen corresponding path program 29 times [2021-08-06 14:54:41,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:41,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252575167] [2021-08-06 14:54:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:41,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:41,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:41,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252575167] [2021-08-06 14:54:41,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252575167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:41,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578947801] [2021-08-06 14:54:41,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:54:41,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:41,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:41,291 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:41,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:54:45,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:54:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:46,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:46,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:46,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578947801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:46,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:46,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:46,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750220523] [2021-08-06 14:54:46,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:46,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:46,522 INFO L87 Difference]: Start difference. First operand 3524 states and 14760 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:47,042 INFO L93 Difference]: Finished difference Result 3702 states and 15428 transitions. [2021-08-06 14:54:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:54:47,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:47,052 INFO L225 Difference]: With dead ends: 3702 [2021-08-06 14:54:47,052 INFO L226 Difference]: Without dead ends: 3687 [2021-08-06 14:54:47,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:54:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-08-06 14:54:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3516. [2021-08-06 14:54:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3516 states, 3515 states have (on average 4.189473684210526) internal successors, (14726), 3515 states have internal predecessors, (14726), 0 states have call successors, (0), 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 14:54:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 14726 transitions. [2021-08-06 14:54:47,112 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 14726 transitions. Word has length 23 [2021-08-06 14:54:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:47,112 INFO L470 AbstractCegarLoop]: Abstraction has 3516 states and 14726 transitions. [2021-08-06 14:54:47,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 14726 transitions. [2021-08-06 14:54:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:47,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:47,119 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, 1] [2021-08-06 14:54:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 14:54:47,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:47,319 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1547561422, now seen corresponding path program 30 times [2021-08-06 14:54:47,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:47,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453786907] [2021-08-06 14:54:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:47,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:47,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:47,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453786907] [2021-08-06 14:54:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453786907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:47,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123413123] [2021-08-06 14:54:47,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:54:47,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:47,536 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:47,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:54:52,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:54:52,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:54:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:52,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:52,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:52,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123413123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:52,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:52,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:52,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266821890] [2021-08-06 14:54:52,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:52,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:52,826 INFO L87 Difference]: Start difference. First operand 3516 states and 14726 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:53,348 INFO L93 Difference]: Finished difference Result 3730 states and 15542 transitions. [2021-08-06 14:54:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:54:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:53,357 INFO L225 Difference]: With dead ends: 3730 [2021-08-06 14:54:53,357 INFO L226 Difference]: Without dead ends: 3708 [2021-08-06 14:54:53,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:54:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-08-06 14:54:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3525. [2021-08-06 14:54:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3524 states have (on average 4.187854710556186) internal successors, (14758), 3524 states have internal predecessors, (14758), 0 states have call successors, (0), 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 14:54:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 14758 transitions. [2021-08-06 14:54:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 14758 transitions. Word has length 23 [2021-08-06 14:54:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:53,417 INFO L470 AbstractCegarLoop]: Abstraction has 3525 states and 14758 transitions. [2021-08-06 14:54:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 14758 transitions. [2021-08-06 14:54:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:53,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:53,423 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, 1] [2021-08-06 14:54:53,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 14:54:53,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:54:53,624 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:54:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:54:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1705829806, now seen corresponding path program 31 times [2021-08-06 14:54:53,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:54:53,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836180809] [2021-08-06 14:54:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:54:53,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:54:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:53,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:54:53,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836180809] [2021-08-06 14:54:53,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836180809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:53,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391973190] [2021-08-06 14:54:53,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:54:53,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:54:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:54:53,845 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:54:53,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:54:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:54:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:54:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:54:58,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:54:58,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:54:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:54:59,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391973190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:54:59,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:54:59,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:54:59,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079390045] [2021-08-06 14:54:59,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:54:59,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:54:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:54:59,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:54:59,174 INFO L87 Difference]: Start difference. First operand 3525 states and 14758 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:54:59,802 INFO L93 Difference]: Finished difference Result 3737 states and 15565 transitions. [2021-08-06 14:54:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:54:59,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:54:59,811 INFO L225 Difference]: With dead ends: 3737 [2021-08-06 14:54:59,811 INFO L226 Difference]: Without dead ends: 3713 [2021-08-06 14:54:59,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:54:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-08-06 14:54:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3522. [2021-08-06 14:54:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:54:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:54:59,868 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:54:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:54:59,868 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:54:59,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:54:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:54:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:54:59,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:54:59,875 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, 1] [2021-08-06 14:54:59,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 14:55:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:55:00,075 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1418708454, now seen corresponding path program 32 times [2021-08-06 14:55:00,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:00,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662420380] [2021-08-06 14:55:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:00,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:00,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:00,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662420380] [2021-08-06 14:55:00,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662420380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:00,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425322231] [2021-08-06 14:55:00,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:55:00,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:00,299 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:00,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:55:05,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:55:05,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:05,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:55:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:05,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425322231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:05,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:05,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:05,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964840198] [2021-08-06 14:55:05,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:05,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:05,711 INFO L87 Difference]: Start difference. First operand 3522 states and 14750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:06,433 INFO L93 Difference]: Finished difference Result 3687 states and 15367 transitions. [2021-08-06 14:55:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:55:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:06,443 INFO L225 Difference]: With dead ends: 3687 [2021-08-06 14:55:06,443 INFO L226 Difference]: Without dead ends: 3665 [2021-08-06 14:55:06,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:55:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-08-06 14:55:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3526. [2021-08-06 14:55:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 4.188936170212766) internal successors, (14766), 3525 states have internal predecessors, (14766), 0 states have call successors, (0), 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 14:55:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 14766 transitions. [2021-08-06 14:55:06,501 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 14766 transitions. Word has length 23 [2021-08-06 14:55:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:06,501 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 14766 transitions. [2021-08-06 14:55:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 14766 transitions. [2021-08-06 14:55:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:06,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:06,508 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, 1] [2021-08-06 14:55:06,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:06,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:06,708 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 925491068, now seen corresponding path program 33 times [2021-08-06 14:55:06,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:06,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525052954] [2021-08-06 14:55:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:06,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525052954] [2021-08-06 14:55:06,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525052954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517094790] [2021-08-06 14:55:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:55:06,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:06,946 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:06,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:55:11,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:55:11,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:11,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:55:12,012 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-06 14:55:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-08-06 14:55:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517094790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:12,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:12,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 14:55:12,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133627394] [2021-08-06 14:55:12,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:55:12,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:12,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:55:12,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:55:12,295 INFO L87 Difference]: Start difference. First operand 3526 states and 14766 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:55:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:13,127 INFO L93 Difference]: Finished difference Result 3807 states and 15857 transitions. [2021-08-06 14:55:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:55:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:55:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:13,137 INFO L225 Difference]: With dead ends: 3807 [2021-08-06 14:55:13,137 INFO L226 Difference]: Without dead ends: 3792 [2021-08-06 14:55:13,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:55:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-08-06 14:55:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3522. [2021-08-06 14:55:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:55:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:55:13,195 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:55:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:13,196 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:55:13,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 14:55:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:55:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:13,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:13,202 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, 1] [2021-08-06 14:55:13,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 14:55:13,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 14:55:13,402 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1860267324, now seen corresponding path program 34 times [2021-08-06 14:55:13,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:13,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425292819] [2021-08-06 14:55:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:13,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:13,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:13,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425292819] [2021-08-06 14:55:13,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425292819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:13,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581028308] [2021-08-06 14:55:13,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:55:13,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:13,633 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:13,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:55:18,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:55:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:18,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:55:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:19,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581028308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:19,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:19,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012898052] [2021-08-06 14:55:19,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:19,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:19,129 INFO L87 Difference]: Start difference. First operand 3522 states and 14750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:19,780 INFO L93 Difference]: Finished difference Result 3677 states and 15326 transitions. [2021-08-06 14:55:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:55:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:19,790 INFO L225 Difference]: With dead ends: 3677 [2021-08-06 14:55:19,791 INFO L226 Difference]: Without dead ends: 3656 [2021-08-06 14:55:19,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 576.4ms TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:55:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-08-06 14:55:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3526. [2021-08-06 14:55:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 4.188936170212766) internal successors, (14766), 3525 states have internal predecessors, (14766), 0 states have call successors, (0), 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 14:55:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 14766 transitions. [2021-08-06 14:55:19,851 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 14766 transitions. Word has length 23 [2021-08-06 14:55:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:19,851 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 14766 transitions. [2021-08-06 14:55:19,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 14766 transitions. [2021-08-06 14:55:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:19,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:19,857 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, 1] [2021-08-06 14:55:19,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:55:20,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:20,058 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 847574792, now seen corresponding path program 35 times [2021-08-06 14:55:20,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:20,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204440838] [2021-08-06 14:55:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:20,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:20,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:20,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204440838] [2021-08-06 14:55:20,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204440838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:20,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304601273] [2021-08-06 14:55:20,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:55:20,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:20,322 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:20,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:55:25,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:55:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:25,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:55:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304601273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:25,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:25,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:25,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979394015] [2021-08-06 14:55:25,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:25,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:25,836 INFO L87 Difference]: Start difference. First operand 3526 states and 14766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:26,318 INFO L93 Difference]: Finished difference Result 3666 states and 15284 transitions. [2021-08-06 14:55:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:55:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:26,328 INFO L225 Difference]: With dead ends: 3666 [2021-08-06 14:55:26,328 INFO L226 Difference]: Without dead ends: 3651 [2021-08-06 14:55:26,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:55:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-08-06 14:55:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3522. [2021-08-06 14:55:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:55:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:55:26,385 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:55:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:26,385 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:55:26,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:55:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:26,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:26,391 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, 1] [2021-08-06 14:55:26,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:26,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:26,592 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -168540314, now seen corresponding path program 36 times [2021-08-06 14:55:26,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:26,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039344062] [2021-08-06 14:55:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:26,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:26,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:26,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039344062] [2021-08-06 14:55:26,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039344062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:26,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298870012] [2021-08-06 14:55:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:55:26,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:26,788 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:26,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:55:31,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:55:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:31,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:31,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:31,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:55:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:32,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298870012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:32,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:32,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:32,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435725568] [2021-08-06 14:55:32,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:32,261 INFO L87 Difference]: Start difference. First operand 3522 states and 14750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:32,772 INFO L93 Difference]: Finished difference Result 3728 states and 15528 transitions. [2021-08-06 14:55:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:55:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:32,782 INFO L225 Difference]: With dead ends: 3728 [2021-08-06 14:55:32,782 INFO L226 Difference]: Without dead ends: 3713 [2021-08-06 14:55:32,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:55:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-08-06 14:55:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3530. [2021-08-06 14:55:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 4.189288750354208) internal successors, (14784), 3529 states have internal predecessors, (14784), 0 states have call successors, (0), 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 14:55:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 14784 transitions. [2021-08-06 14:55:32,842 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 14784 transitions. Word has length 23 [2021-08-06 14:55:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:32,868 INFO L470 AbstractCegarLoop]: Abstraction has 3530 states and 14784 transitions. [2021-08-06 14:55:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 14784 transitions. [2021-08-06 14:55:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:32,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:32,875 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, 1] [2021-08-06 14:55:32,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 14:55:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:33,076 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash 416793638, now seen corresponding path program 37 times [2021-08-06 14:55:33,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:33,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698954653] [2021-08-06 14:55:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:33,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698954653] [2021-08-06 14:55:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698954653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026058185] [2021-08-06 14:55:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:55:33,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:33,288 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:33,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:55:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:38,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:38,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:55:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:38,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026058185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:38,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:38,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:38,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110561354] [2021-08-06 14:55:38,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:38,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:38,768 INFO L87 Difference]: Start difference. First operand 3530 states and 14784 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:39,561 INFO L93 Difference]: Finished difference Result 3709 states and 15453 transitions. [2021-08-06 14:55:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:55:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:39,570 INFO L225 Difference]: With dead ends: 3709 [2021-08-06 14:55:39,570 INFO L226 Difference]: Without dead ends: 3687 [2021-08-06 14:55:39,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 742.1ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:55:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-08-06 14:55:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3534. [2021-08-06 14:55:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 4.1890744409849985) internal successors, (14800), 3533 states have internal predecessors, (14800), 0 states have call successors, (0), 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 14:55:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 14800 transitions. [2021-08-06 14:55:39,629 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 14800 transitions. Word has length 23 [2021-08-06 14:55:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:39,630 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 14800 transitions. [2021-08-06 14:55:39,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 14800 transitions. [2021-08-06 14:55:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:39,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:39,636 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, 1] [2021-08-06 14:55:39,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 14:55:39,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:39,837 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2030360372, now seen corresponding path program 38 times [2021-08-06 14:55:39,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:39,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14451107] [2021-08-06 14:55:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:39,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:40,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:40,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14451107] [2021-08-06 14:55:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14451107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:40,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098801060] [2021-08-06 14:55:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:55:40,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:40,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:40,049 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:40,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:55:45,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:55:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:45,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:55:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:45,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098801060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:45,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:45,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:45,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647662719] [2021-08-06 14:55:45,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:45,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:45,627 INFO L87 Difference]: Start difference. First operand 3534 states and 14800 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:46,227 INFO L93 Difference]: Finished difference Result 3666 states and 15284 transitions. [2021-08-06 14:55:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:55:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:46,236 INFO L225 Difference]: With dead ends: 3666 [2021-08-06 14:55:46,236 INFO L226 Difference]: Without dead ends: 3651 [2021-08-06 14:55:46,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:55:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-08-06 14:55:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3526. [2021-08-06 14:55:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 4.188936170212766) internal successors, (14766), 3525 states have internal predecessors, (14766), 0 states have call successors, (0), 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 14:55:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 14766 transitions. [2021-08-06 14:55:46,308 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 14766 transitions. Word has length 23 [2021-08-06 14:55:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:46,308 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 14766 transitions. [2021-08-06 14:55:46,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 14766 transitions. [2021-08-06 14:55:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:46,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:46,314 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, 1] [2021-08-06 14:55:46,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 14:55:46,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:46,515 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1704045700, now seen corresponding path program 39 times [2021-08-06 14:55:46,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:46,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80244019] [2021-08-06 14:55:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:46,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:46,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:46,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80244019] [2021-08-06 14:55:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80244019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:46,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180580388] [2021-08-06 14:55:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:55:46,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:46,713 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:46,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:55:51,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:55:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:52,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:55:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180580388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:52,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:52,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309041512] [2021-08-06 14:55:52,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:52,278 INFO L87 Difference]: Start difference. First operand 3526 states and 14766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:52,734 INFO L93 Difference]: Finished difference Result 3703 states and 15426 transitions. [2021-08-06 14:55:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:55:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:52,743 INFO L225 Difference]: With dead ends: 3703 [2021-08-06 14:55:52,743 INFO L226 Difference]: Without dead ends: 3688 [2021-08-06 14:55:52,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:55:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-08-06 14:55:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3522. [2021-08-06 14:55:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:55:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:55:52,808 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:55:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:55:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:55:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:52,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:52,815 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, 1] [2021-08-06 14:55:52,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 14:55:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:53,016 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1032228548, now seen corresponding path program 40 times [2021-08-06 14:55:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:53,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573459776] [2021-08-06 14:55:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:53,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:53,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:53,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573459776] [2021-08-06 14:55:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573459776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:53,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554361532] [2021-08-06 14:55:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:55:53,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:53,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:53,248 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:55:58,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:55:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:55:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:55:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:55:58,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:55:58,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:55:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554361532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:58,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:55:58,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:55:58,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678362563] [2021-08-06 14:55:58,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:55:58,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:55:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:55:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:55:58,848 INFO L87 Difference]: Start difference. First operand 3522 states and 14750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:55:59,429 INFO L93 Difference]: Finished difference Result 3744 states and 15586 transitions. [2021-08-06 14:55:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:55:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:55:59,438 INFO L225 Difference]: With dead ends: 3744 [2021-08-06 14:55:59,439 INFO L226 Difference]: Without dead ends: 3729 [2021-08-06 14:55:59,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:55:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-08-06 14:55:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3530. [2021-08-06 14:55:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 4.189288750354208) internal successors, (14784), 3529 states have internal predecessors, (14784), 0 states have call successors, (0), 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 14:55:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 14784 transitions. [2021-08-06 14:55:59,502 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 14784 transitions. Word has length 23 [2021-08-06 14:55:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:55:59,502 INFO L470 AbstractCegarLoop]: Abstraction has 3530 states and 14784 transitions. [2021-08-06 14:55:59,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:55:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 14784 transitions. [2021-08-06 14:55:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:55:59,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:55:59,510 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, 1] [2021-08-06 14:55:59,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 14:55:59,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 14:55:59,711 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:55:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:55:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -518701696, now seen corresponding path program 41 times [2021-08-06 14:55:59,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:55:59,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19009886] [2021-08-06 14:55:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:55:59,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:55:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:55:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:55:59,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:55:59,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19009886] [2021-08-06 14:55:59,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19009886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:55:59,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312013650] [2021-08-06 14:55:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:55:59,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:55:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:55:59,908 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:55:59,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:56:05,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:56:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:05,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:56:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:05,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312013650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:05,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:05,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:05,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388358179] [2021-08-06 14:56:05,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:05,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:05,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:05,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:05,618 INFO L87 Difference]: Start difference. First operand 3530 states and 14784 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:06,265 INFO L93 Difference]: Finished difference Result 3711 states and 15460 transitions. [2021-08-06 14:56:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:56:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:06,274 INFO L225 Difference]: With dead ends: 3711 [2021-08-06 14:56:06,274 INFO L226 Difference]: Without dead ends: 3690 [2021-08-06 14:56:06,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:56:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-08-06 14:56:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3534. [2021-08-06 14:56:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 4.1890744409849985) internal successors, (14800), 3533 states have internal predecessors, (14800), 0 states have call successors, (0), 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 14:56:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 14800 transitions. [2021-08-06 14:56:06,331 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 14800 transitions. Word has length 23 [2021-08-06 14:56:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:06,331 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 14800 transitions. [2021-08-06 14:56:06,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 14800 transitions. [2021-08-06 14:56:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:06,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:06,338 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, 1] [2021-08-06 14:56:06,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 14:56:06,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:56:06,538 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash 557009460, now seen corresponding path program 42 times [2021-08-06 14:56:06,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:06,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775404585] [2021-08-06 14:56:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:06,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:06,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:06,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775404585] [2021-08-06 14:56:06,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775404585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:06,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413397206] [2021-08-06 14:56:06,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:56:06,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:06,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:06,743 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:06,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:56:11,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:56:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:12,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:12,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:56:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:12,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413397206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:12,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:12,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:12,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990159642] [2021-08-06 14:56:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:12,451 INFO L87 Difference]: Start difference. First operand 3534 states and 14800 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:13,001 INFO L93 Difference]: Finished difference Result 3692 states and 15387 transitions. [2021-08-06 14:56:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:56:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:13,011 INFO L225 Difference]: With dead ends: 3692 [2021-08-06 14:56:13,011 INFO L226 Difference]: Without dead ends: 3677 [2021-08-06 14:56:13,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:56:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-08-06 14:56:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3526. [2021-08-06 14:56:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 4.188936170212766) internal successors, (14766), 3525 states have internal predecessors, (14766), 0 states have call successors, (0), 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 14:56:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 14766 transitions. [2021-08-06 14:56:13,071 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 14766 transitions. Word has length 23 [2021-08-06 14:56:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:13,071 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 14766 transitions. [2021-08-06 14:56:13,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 14766 transitions. [2021-08-06 14:56:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:13,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:13,078 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, 1] [2021-08-06 14:56:13,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:56:13,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:56:13,278 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash 727824392, now seen corresponding path program 43 times [2021-08-06 14:56:13,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:13,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850665247] [2021-08-06 14:56:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:13,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:13,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:13,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850665247] [2021-08-06 14:56:13,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850665247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:13,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306977838] [2021-08-06 14:56:13,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:56:13,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:13,485 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:13,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:56:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:18,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:18,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:18,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:56:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:19,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306977838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:19,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:19,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:19,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620468201] [2021-08-06 14:56:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:19,152 INFO L87 Difference]: Start difference. First operand 3526 states and 14766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:19,561 INFO L93 Difference]: Finished difference Result 3693 states and 15386 transitions. [2021-08-06 14:56:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:56:19,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:19,571 INFO L225 Difference]: With dead ends: 3693 [2021-08-06 14:56:19,571 INFO L226 Difference]: Without dead ends: 3678 [2021-08-06 14:56:19,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:56:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-08-06 14:56:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3522. [2021-08-06 14:56:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:56:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:56:19,627 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:56:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:56:19,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:56:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:19,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:19,633 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, 1] [2021-08-06 14:56:19,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:19,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:19,834 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash 981570640, now seen corresponding path program 44 times [2021-08-06 14:56:19,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:19,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035398833] [2021-08-06 14:56:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:19,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:20,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:20,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035398833] [2021-08-06 14:56:20,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035398833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:20,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846457346] [2021-08-06 14:56:20,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:56:20,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:20,045 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:20,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:56:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:56:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:56:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:25,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:25,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-08-06 14:56:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:25,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846457346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:25,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:25,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:56:25,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485982535] [2021-08-06 14:56:25,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:56:25,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:56:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:56:25,704 INFO L87 Difference]: Start difference. First operand 3522 states and 14750 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:56:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:26,386 INFO L93 Difference]: Finished difference Result 4148 states and 17203 transitions. [2021-08-06 14:56:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:56:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:56:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:26,397 INFO L225 Difference]: With dead ends: 4148 [2021-08-06 14:56:26,397 INFO L226 Difference]: Without dead ends: 4126 [2021-08-06 14:56:26,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:56:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-08-06 14:56:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3534. [2021-08-06 14:56:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 4.19077271440702) internal successors, (14806), 3533 states have internal predecessors, (14806), 0 states have call successors, (0), 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 14:56:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 14806 transitions. [2021-08-06 14:56:26,459 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 14806 transitions. Word has length 23 [2021-08-06 14:56:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:26,459 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 14806 transitions. [2021-08-06 14:56:26,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 14:56:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 14806 transitions. [2021-08-06 14:56:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:26,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:26,466 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, 1] [2021-08-06 14:56:26,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:26,666 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1566904592, now seen corresponding path program 45 times [2021-08-06 14:56:26,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:26,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173563528] [2021-08-06 14:56:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:26,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:26,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:26,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173563528] [2021-08-06 14:56:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173563528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:26,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88588646] [2021-08-06 14:56:26,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:56:26,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:26,884 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:26,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 14:56:32,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:56:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:56:32,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:32,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:32,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-08-06 14:56:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88588646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:32,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:32,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:56:32,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629871843] [2021-08-06 14:56:32,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:56:32,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:56:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:56:32,804 INFO L87 Difference]: Start difference. First operand 3534 states and 14806 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:56:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:34,785 INFO L93 Difference]: Finished difference Result 3976 states and 16514 transitions. [2021-08-06 14:56:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:56:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 14:56:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:34,796 INFO L225 Difference]: With dead ends: 3976 [2021-08-06 14:56:34,796 INFO L226 Difference]: Without dead ends: 3950 [2021-08-06 14:56:34,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1118.4ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:56:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-08-06 14:56:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3538. [2021-08-06 14:56:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 4.190556969182923) internal successors, (14822), 3537 states have internal predecessors, (14822), 0 states have call successors, (0), 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 14:56:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 14822 transitions. [2021-08-06 14:56:34,866 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 14822 transitions. Word has length 23 [2021-08-06 14:56:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:34,866 INFO L470 AbstractCegarLoop]: Abstraction has 3538 states and 14822 transitions. [2021-08-06 14:56:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 14:56:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 14822 transitions. [2021-08-06 14:56:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:34,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:34,873 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, 1] [2021-08-06 14:56:34,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-06 14:56:35,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-06 14:56:35,073 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1114495970, now seen corresponding path program 46 times [2021-08-06 14:56:35,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:35,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362117219] [2021-08-06 14:56:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:35,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:35,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:35,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362117219] [2021-08-06 14:56:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362117219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:35,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256957016] [2021-08-06 14:56:35,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:56:35,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:35,292 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:35,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 14:56:40,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:56:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:40,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:56:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:41,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256957016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:41,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:41,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:41,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467498426] [2021-08-06 14:56:41,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:41,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:41,083 INFO L87 Difference]: Start difference. First operand 3538 states and 14822 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:41,937 INFO L93 Difference]: Finished difference Result 4035 states and 16740 transitions. [2021-08-06 14:56:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:56:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:41,949 INFO L225 Difference]: With dead ends: 4035 [2021-08-06 14:56:41,949 INFO L226 Difference]: Without dead ends: 4014 [2021-08-06 14:56:41,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:56:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2021-08-06 14:56:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3530. [2021-08-06 14:56:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 4.190422215925191) internal successors, (14788), 3529 states have internal predecessors, (14788), 0 states have call successors, (0), 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 14:56:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 14788 transitions. [2021-08-06 14:56:42,045 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 14788 transitions. Word has length 23 [2021-08-06 14:56:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 3530 states and 14788 transitions. [2021-08-06 14:56:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 14788 transitions. [2021-08-06 14:56:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:42,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:42,055 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, 1] [2021-08-06 14:56:42,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 14:56:42,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:42,269 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1331068018, now seen corresponding path program 47 times [2021-08-06 14:56:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:42,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637563619] [2021-08-06 14:56:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:42,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:42,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:42,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637563619] [2021-08-06 14:56:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637563619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:42,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503508953] [2021-08-06 14:56:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:56:42,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:42,477 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:42,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 14:56:47,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:56:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:48,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:48,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-06 14:56:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:48,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503508953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:48,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:48,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:48,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585658574] [2021-08-06 14:56:48,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:48,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:48,321 INFO L87 Difference]: Start difference. First operand 3530 states and 14788 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:49,139 INFO L93 Difference]: Finished difference Result 4195 states and 17378 transitions. [2021-08-06 14:56:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:56:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:49,150 INFO L225 Difference]: With dead ends: 4195 [2021-08-06 14:56:49,150 INFO L226 Difference]: Without dead ends: 4160 [2021-08-06 14:56:49,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:56:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-08-06 14:56:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3536. [2021-08-06 14:56:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3535 states have (on average 4.1912305516265915) internal successors, (14816), 3535 states have internal predecessors, (14816), 0 states have call successors, (0), 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 14:56:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 14816 transitions. [2021-08-06 14:56:49,219 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 14816 transitions. Word has length 23 [2021-08-06 14:56:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 3536 states and 14816 transitions. [2021-08-06 14:56:49,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 14816 transitions. [2021-08-06 14:56:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:49,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:49,226 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, 1] [2021-08-06 14:56:49,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-06 14:56:49,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:49,426 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1412467074, now seen corresponding path program 48 times [2021-08-06 14:56:49,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:49,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991745240] [2021-08-06 14:56:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:49,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:49,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:49,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991745240] [2021-08-06 14:56:49,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991745240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:49,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276168849] [2021-08-06 14:56:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:56:49,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:49,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:49,669 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:49,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 14:56:55,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:56:55,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:56:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:56:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:56:55,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:56:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:56:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276168849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:55,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:56:55,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:56:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92695687] [2021-08-06 14:56:55,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:56:55,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:56:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:56:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:56:55,674 INFO L87 Difference]: Start difference. First operand 3536 states and 14816 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:56:56,598 INFO L93 Difference]: Finished difference Result 4009 states and 16647 transitions. [2021-08-06 14:56:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:56:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:56:56,608 INFO L225 Difference]: With dead ends: 4009 [2021-08-06 14:56:56,608 INFO L226 Difference]: Without dead ends: 3983 [2021-08-06 14:56:56,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:56:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2021-08-06 14:56:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3542. [2021-08-06 14:56:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3541 states have (on average 4.190341711380966) internal successors, (14838), 3541 states have internal predecessors, (14838), 0 states have call successors, (0), 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 14:56:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 14838 transitions. [2021-08-06 14:56:56,674 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 14838 transitions. Word has length 23 [2021-08-06 14:56:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:56:56,674 INFO L470 AbstractCegarLoop]: Abstraction has 3542 states and 14838 transitions. [2021-08-06 14:56:56,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:56:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 14838 transitions. [2021-08-06 14:56:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:56:56,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:56:56,680 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, 1] [2021-08-06 14:56:56,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-06 14:56:56,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-08-06 14:56:56,881 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:56:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:56:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1268933488, now seen corresponding path program 49 times [2021-08-06 14:56:56,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:56:56,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625157502] [2021-08-06 14:56:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:56:56,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:56:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:56:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:56:57,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:56:57,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625157502] [2021-08-06 14:56:57,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625157502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:56:57,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005278572] [2021-08-06 14:56:57,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:56:57,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:56:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:56:57,106 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:56:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 14:57:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:57:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:02,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:57:02,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-06 14:57:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:03,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005278572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:03,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:03,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:57:03,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767682995] [2021-08-06 14:57:03,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:57:03,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:57:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:57:03,057 INFO L87 Difference]: Start difference. First operand 3542 states and 14838 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:57:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:03,836 INFO L93 Difference]: Finished difference Result 4064 states and 16857 transitions. [2021-08-06 14:57:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:57:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:57:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:03,846 INFO L225 Difference]: With dead ends: 4064 [2021-08-06 14:57:03,847 INFO L226 Difference]: Without dead ends: 4043 [2021-08-06 14:57:03,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:57:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-08-06 14:57:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3522. [2021-08-06 14:57:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 4.189150809429139) internal successors, (14750), 3521 states have internal predecessors, (14750), 0 states have call successors, (0), 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 14:57:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 14750 transitions. [2021-08-06 14:57:03,913 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 14750 transitions. Word has length 23 [2021-08-06 14:57:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:03,913 INFO L470 AbstractCegarLoop]: Abstraction has 3522 states and 14750 transitions. [2021-08-06 14:57:03,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 14:57:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 14750 transitions. [2021-08-06 14:57:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:57:03,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:03,920 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, 1] [2021-08-06 14:57:03,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-06 14:57:04,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:04,121 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:57:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1132683500, now seen corresponding path program 50 times [2021-08-06 14:57:04,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:04,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143975840] [2021-08-06 14:57:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:04,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:04,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:04,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143975840] [2021-08-06 14:57:04,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143975840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:04,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416547213] [2021-08-06 14:57:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:57:04,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:04,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:04,371 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:57:04,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:57:07,496 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:57:07,496 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:57:08,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:57:08,540 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 [2021-08-06 14:57:08,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-06 14:57:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 14:57:08,715 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. [2021-08-06 14:57:08,717 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:57:08,717 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:57:08,717 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:57:08,717 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 14:57:08,721 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:57:08,721 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:57:08,722 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:57:08 BasicIcfg [2021-08-06 14:57:08,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:57:08,723 INFO L168 Benchmark]: Toolchain (without parser) took 684401.45 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 194.7 MB in the beginning and 677.7 MB in the end (delta: -483.0 MB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. [2021-08-06 14:57:08,723 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 215.0 MB. Free memory is still 195.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:57:08,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.63 ms. Allocated memory is still 215.0 MB. Free memory was 194.7 MB in the beginning and 193.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:57:08,723 INFO L168 Benchmark]: Boogie Preprocessor took 18.86 ms. Allocated memory is still 215.0 MB. Free memory was 193.1 MB in the beginning and 192.2 MB in the end (delta: 883.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:57:08,723 INFO L168 Benchmark]: RCFGBuilder took 302.42 ms. Allocated memory is still 215.0 MB. Free memory was 192.1 MB in the beginning and 176.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 14:57:08,723 INFO L168 Benchmark]: TraceAbstraction took 684047.59 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 176.2 MB in the beginning and 677.7 MB in the end (delta: -501.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. [2021-08-06 14:57:08,724 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 0.11 ms. Allocated memory is still 215.0 MB. Free memory is still 195.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.63 ms. Allocated memory is still 215.0 MB. Free memory was 194.7 MB in the beginning and 193.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.86 ms. Allocated memory is still 215.0 MB. Free memory was 193.1 MB in the beginning and 192.2 MB in the end (delta: 883.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 302.42 ms. Allocated memory is still 215.0 MB. Free memory was 192.1 MB in the beginning and 176.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 684047.59 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 176.2 MB in the beginning and 677.7 MB in the end (delta: -501.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 683926.7ms, OverallIterations: 167, TraceHistogramMax: 3, EmptinessCheckTime: 1001.2ms, AutomataDifference: 113885.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9752 SDtfs, 25745 SDslu, 87684 SDs, 0 SdLazy, 96641 SolverSat, 8133 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 40500.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6758 GetRequests, 2333 SyntacticMatches, 146 SemanticMatches, 4279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24623 ImplicationChecksByTransitivity, 89596.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3542occurred in iteration=165, InterpolantAutomatonStates: 3751, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9577.5ms AutomataMinimizationTime, 166 MinimizatonAttempts, 69531 StatesRemovedByMinimization, 166 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 656.7ms SsaConstructionTime, 2658.7ms SatisfiabilityAnalysisTime, 113724.9ms InterpolantComputationTime, 7377 NumberOfCodeBlocks, 7377 NumberOfCodeBlocksAsserted, 531 NumberOfCheckSat, 7046 ConstructedInterpolants, 19 QuantifiedInterpolants, 126163 SizeOfPredicates, 1099 NumberOfNonLiveVariables, 14121 ConjunctsInSsa, 4680 ConjunctsInUnsatCore, 331 InterpolantComputations, 4 PerfectInterpolantSequences, 32/2114 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown