/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:06:16,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:06:16,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:06:16,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 13:06:16,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 13:06:16,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 13:06:16,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 13:06:16,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 13:06:16,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 13:06:16,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 13:06:16,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 13:06:16,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-21 13:06:16,841 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 [2021-08-21 13:06:16,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:06:16,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:06:16,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:06:16,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:06:16,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:06:16,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:06:16,868 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:06:16,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:06:16,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:06:16,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:06:16,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:06:16,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:06:16,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:06:16,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:06:17,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:06:17,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:06:17,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:06:17,142 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:06:17,143 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:06:17,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-08-21 13:06:17,144 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-08-21 13:06:17,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:06:17,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:06:17,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:06:17,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:06:17,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:06:17,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:06:17,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:06:17,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:06:17,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:06:17,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:06:17,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:06:17,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:06:17,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:06:17,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/1) ... [2021-08-21 13:06:17,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:06:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:17,244 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) [2021-08-21 13:06:17,246 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 [2021-08-21 13:06:17,272 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:06:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:06:17,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:06:17,272 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:06:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:06:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:06:17,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:06:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:06:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:06:17,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:06:17,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:06:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:06:17,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 13:06:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 13:06:17,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 13:06:17,275 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 13:06:17,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:06:17,484 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:06:17,486 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:06:17 BoogieIcfgContainer [2021-08-21 13:06:17,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:06:17,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:06:17,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:06:17,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:06:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:06:17" (1/2) ... [2021-08-21 13:06:17,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25be9788 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:06:17, skipping insertion in model container [2021-08-21 13:06:17,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:06:17" (2/2) ... [2021-08-21 13:06:17,490 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-08-21 13:06:17,493 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:06:17,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:06:17,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:06:17,493 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:06:17,543 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 13:06:17,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:06:17,588 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 [2021-08-21 13:06:17,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 13:06:17,598 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-08-21 13:06:17,650 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 13:06:17,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:17,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:17,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2021-08-21 13:06:17,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:17,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450476187] [2021-08-21 13:06:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:17,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:17,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:17,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450476187] [2021-08-21 13:06:17,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450476187] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:17,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:17,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:06:17,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574248242] [2021-08-21 13:06:17,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:06:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:06:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:06:17,824 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:17,861 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-08-21 13:06:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:06:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 13:06:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:17,883 INFO L225 Difference]: With dead ends: 1236 [2021-08-21 13:06:17,883 INFO L226 Difference]: Without dead ends: 1109 [2021-08-21 13:06:17,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:06:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-21 13:06:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-08-21 13:06:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-08-21 13:06:18,007 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-08-21 13:06:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:18,008 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-08-21 13:06:18,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-08-21 13:06:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:06:18,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:18,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:18,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:06:18,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:18,012 INFO L82 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2021-08-21 13:06:18,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:18,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408174735] [2021-08-21 13:06:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:18,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:18,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:18,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408174735] [2021-08-21 13:06:18,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408174735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:18,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:18,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:18,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879913107] [2021-08-21 13:06:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:18,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:18,054 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-21 13:06:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:18,100 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-08-21 13:06:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-08-21 13:06:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:18,107 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 13:06:18,107 INFO L226 Difference]: Without dead ends: 1418 [2021-08-21 13:06:18,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-21 13:06:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-08-21 13:06:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-08-21 13:06:18,170 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-08-21 13:06:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-08-21 13:06:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-21 13:06:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-08-21 13:06:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 13:06:18,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:18,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:06:18,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:18,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2021-08-21 13:06:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:18,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919354917] [2021-08-21 13:06:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:18,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:18,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:18,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919354917] [2021-08-21 13:06:18,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919354917] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:18,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:18,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:18,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202922429] [2021-08-21 13:06:18,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:18,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:18,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:18,237 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-21 13:06:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:18,275 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-08-21 13:06:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-08-21 13:06:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:18,287 INFO L225 Difference]: With dead ends: 2017 [2021-08-21 13:06:18,291 INFO L226 Difference]: Without dead ends: 1875 [2021-08-21 13:06:18,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-08-21 13:06:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-08-21 13:06:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-08-21 13:06:18,331 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-08-21 13:06:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:18,332 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-08-21 13:06:18,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-21 13:06:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-08-21 13:06:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:06:18,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:18,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:06:18,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2021-08-21 13:06:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:18,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301807522] [2021-08-21 13:06:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:18,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:18,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:18,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301807522] [2021-08-21 13:06:18,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301807522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:18,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582311219] [2021-08-21 13:06:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:18,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:18,432 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) [2021-08-21 13:06:18,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 13:06:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 13:06:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:18,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582311219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:18,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:18,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-21 13:06:18,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088935823] [2021-08-21 13:06:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:06:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:18,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:06:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:06:18,640 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:18,760 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-08-21 13:06:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:06:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:06:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:18,770 INFO L225 Difference]: With dead ends: 2308 [2021-08-21 13:06:18,770 INFO L226 Difference]: Without dead ends: 2108 [2021-08-21 13:06:18,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:06:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-08-21 13:06:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-08-21 13:06:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-08-21 13:06:18,822 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-08-21 13:06:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-08-21 13:06:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-08-21 13:06:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:06:18,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:18,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:18,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:19,041 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2021-08-21 13:06:19,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740665971] [2021-08-21 13:06:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:19,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740665971] [2021-08-21 13:06:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740665971] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:19,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:19,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:19,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467445945] [2021-08-21 13:06:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:19,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:19,073 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:19,134 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-08-21 13:06:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:06:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:06:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:19,143 INFO L225 Difference]: With dead ends: 1950 [2021-08-21 13:06:19,143 INFO L226 Difference]: Without dead ends: 1860 [2021-08-21 13:06:19,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-21 13:06:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-08-21 13:06:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-08-21 13:06:19,181 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-08-21 13:06:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:19,181 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-08-21 13:06:19,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-08-21 13:06:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:06:19,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:19,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:19,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 13:06:19,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2021-08-21 13:06:19,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725728589] [2021-08-21 13:06:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:19,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:19,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725728589] [2021-08-21 13:06:19,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725728589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:19,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:19,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:19,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933318847] [2021-08-21 13:06:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:19,220 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:19,273 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-08-21 13:06:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:06:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:06:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:19,280 INFO L225 Difference]: With dead ends: 1308 [2021-08-21 13:06:19,280 INFO L226 Difference]: Without dead ends: 1308 [2021-08-21 13:06:19,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-08-21 13:06:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-08-21 13:06:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-08-21 13:06:19,306 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-08-21 13:06:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:19,306 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-08-21 13:06:19,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-08-21 13:06:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:06:19,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:19,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 13:06:19,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2021-08-21 13:06:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712023618] [2021-08-21 13:06:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:19,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:19,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712023618] [2021-08-21 13:06:19,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712023618] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:19,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:19,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:19,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851693458] [2021-08-21 13:06:19,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:19,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:19,340 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:19,380 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-08-21 13:06:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:06:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:19,385 INFO L225 Difference]: With dead ends: 1142 [2021-08-21 13:06:19,385 INFO L226 Difference]: Without dead ends: 1120 [2021-08-21 13:06:19,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-08-21 13:06:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-08-21 13:06:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-08-21 13:06:19,409 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-08-21 13:06:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-08-21 13:06:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-08-21 13:06:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:06:19,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:19,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:19,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 13:06:19,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2021-08-21 13:06:19,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482596302] [2021-08-21 13:06:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482596302] [2021-08-21 13:06:19,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482596302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:19,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:19,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:06:19,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389816655] [2021-08-21 13:06:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:19,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:19,451 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:19,467 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-08-21 13:06:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:06:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:19,474 INFO L225 Difference]: With dead ends: 1334 [2021-08-21 13:06:19,474 INFO L226 Difference]: Without dead ends: 1334 [2021-08-21 13:06:19,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:06:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-08-21 13:06:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-08-21 13:06:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-08-21 13:06:19,495 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-08-21 13:06:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-08-21 13:06:19,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-08-21 13:06:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:06:19,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:19,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:19,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 13:06:19,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2021-08-21 13:06:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461448812] [2021-08-21 13:06:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:19,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:19,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461448812] [2021-08-21 13:06:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461448812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:19,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218544998] [2021-08-21 13:06:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:19,534 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) [2021-08-21 13:06:19,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 13:06:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 13:06:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:19,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218544998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:19,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 13:06:19,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-21 13:06:19,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665392811] [2021-08-21 13:06:19,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:19,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:19,668 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:19,686 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-08-21 13:06:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:06:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:19,704 INFO L225 Difference]: With dead ends: 1658 [2021-08-21 13:06:19,704 INFO L226 Difference]: Without dead ends: 1658 [2021-08-21 13:06:19,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-08-21 13:06:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-08-21 13:06:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-08-21 13:06:19,728 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-08-21 13:06:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:19,728 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-08-21 13:06:19,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-08-21 13:06:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:19,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:19,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:19,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:19,947 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,SelfDestructingSolverStorable8 [2021-08-21 13:06:19,947 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2021-08-21 13:06:19,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:19,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322076987] [2021-08-21 13:06:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:19,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:20,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:20,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322076987] [2021-08-21 13:06:20,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322076987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:20,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078906051] [2021-08-21 13:06:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:20,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:20,097 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) [2021-08-21 13:06:20,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:06:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:20,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:06:20,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:20,455 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 13 treesize of output 9 [2021-08-21 13:06:20,496 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 11 [2021-08-21 13:06:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:20,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078906051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:20,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160284636] [2021-08-21 13:06:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:20,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:20,666 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:20,800 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2021-08-21 13:06:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:06:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:06:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:20,807 INFO L225 Difference]: With dead ends: 2387 [2021-08-21 13:06:20,807 INFO L226 Difference]: Without dead ends: 2308 [2021-08-21 13:06:20,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-08-21 13:06:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2021-08-21 13:06:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2021-08-21 13:06:20,838 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2021-08-21 13:06:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:20,839 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2021-08-21 13:06:20,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2021-08-21 13:06:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:20,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:20,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:20,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:21,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:21,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2021-08-21 13:06:21,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:21,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644962996] [2021-08-21 13:06:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:21,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:21,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644962996] [2021-08-21 13:06:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644962996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999193885] [2021-08-21 13:06:21,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:06:21,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:21,175 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) [2021-08-21 13:06:21,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 13:06:21,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:06:21,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:06:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:06:21,573 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 11 [2021-08-21 13:06:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999193885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:21,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:21,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:21,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072188357] [2021-08-21 13:06:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:21,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:21,699 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:21,817 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2021-08-21 13:06:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:06:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:06:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:21,826 INFO L225 Difference]: With dead ends: 2792 [2021-08-21 13:06:21,826 INFO L226 Difference]: Without dead ends: 2713 [2021-08-21 13:06:21,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-08-21 13:06:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2021-08-21 13:06:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2021-08-21 13:06:21,868 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2021-08-21 13:06:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:21,869 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2021-08-21 13:06:21,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2021-08-21 13:06:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:21,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:21,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:21,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:22,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:22,089 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2021-08-21 13:06:22,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:22,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755954292] [2021-08-21 13:06:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:22,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:22,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:22,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755954292] [2021-08-21 13:06:22,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755954292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:22,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190386654] [2021-08-21 13:06:22,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:06:22,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:22,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:22,235 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) [2021-08-21 13:06:22,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 13:06:22,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:06:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:06:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:22,557 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 13 [2021-08-21 13:06:22,595 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 11 [2021-08-21 13:06:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190386654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:22,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:22,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:22,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790246274] [2021-08-21 13:06:22,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:22,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:22,670 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 13:06:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:22,791 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2021-08-21 13:06:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:06:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2021-08-21 13:06:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:22,798 INFO L225 Difference]: With dead ends: 2570 [2021-08-21 13:06:22,798 INFO L226 Difference]: Without dead ends: 2491 [2021-08-21 13:06:22,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-08-21 13:06:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2021-08-21 13:06:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-08-21 13:06:22,836 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-08-21 13:06:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:22,836 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-08-21 13:06:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 13:06:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-08-21 13:06:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:22,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:22,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:22,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:23,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 13:06:23,055 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2021-08-21 13:06:23,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:23,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930910439] [2021-08-21 13:06:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:23,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:23,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:23,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930910439] [2021-08-21 13:06:23,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930910439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:23,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518625188] [2021-08-21 13:06:23,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:06:23,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:23,229 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) [2021-08-21 13:06:23,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 13:06:23,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:06:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:06:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:23,546 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 13 [2021-08-21 13:06:23,563 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 11 [2021-08-21 13:06:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518625188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:23,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:23,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:23,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284456515] [2021-08-21 13:06:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:23,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:23,684 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-08-21 13:06:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:23,860 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2021-08-21 13:06:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:06:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 29 [2021-08-21 13:06:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:23,870 INFO L225 Difference]: With dead ends: 3006 [2021-08-21 13:06:23,870 INFO L226 Difference]: Without dead ends: 2927 [2021-08-21 13:06:23,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:06:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-08-21 13:06:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2021-08-21 13:06:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-08-21 13:06:23,916 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-08-21 13:06:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-08-21 13:06:23,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-08-21 13:06:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-08-21 13:06:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:23,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:23,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:23,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:24,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:24,139 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2021-08-21 13:06:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:24,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208388927] [2021-08-21 13:06:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:24,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:24,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:24,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208388927] [2021-08-21 13:06:24,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208388927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:24,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970045183] [2021-08-21 13:06:24,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:06:24,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:24,268 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) [2021-08-21 13:06:24,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 13:06:24,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:06:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:06:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:24,587 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 13 [2021-08-21 13:06:24,666 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 11 [2021-08-21 13:06:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:24,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970045183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:24,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:24,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:24,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774456093] [2021-08-21 13:06:24,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:24,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:24,762 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 13:06:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:24,927 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2021-08-21 13:06:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:06:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2021-08-21 13:06:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:24,935 INFO L225 Difference]: With dead ends: 2784 [2021-08-21 13:06:24,935 INFO L226 Difference]: Without dead ends: 2705 [2021-08-21 13:06:24,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:06:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-08-21 13:06:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2021-08-21 13:06:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-08-21 13:06:24,971 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-08-21 13:06:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:24,971 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-08-21 13:06:24,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 13:06:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-08-21 13:06:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:06:24,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:24,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:25,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:25,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:25,189 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2021-08-21 13:06:25,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:25,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792781982] [2021-08-21 13:06:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:25,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:25,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:25,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792781982] [2021-08-21 13:06:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792781982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:25,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661439067] [2021-08-21 13:06:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:06:25,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:25,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:25,332 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) [2021-08-21 13:06:25,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 13:06:25,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:06:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:06:25,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:25,730 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 11 [2021-08-21 13:06:25,753 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 11 [2021-08-21 13:06:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:25,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661439067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:25,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:25,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 13:06:25,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399591979] [2021-08-21 13:06:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:25,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:25,870 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-21 13:06:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:26,067 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2021-08-21 13:06:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:06:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 29 [2021-08-21 13:06:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:26,075 INFO L225 Difference]: With dead ends: 2657 [2021-08-21 13:06:26,076 INFO L226 Difference]: Without dead ends: 2578 [2021-08-21 13:06:26,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:06:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-08-21 13:06:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2021-08-21 13:06:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-08-21 13:06:26,113 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-08-21 13:06:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:26,114 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-08-21 13:06:26,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2021-08-21 13:06:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-08-21 13:06:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 13:06:26,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:26,119 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:26,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:26,338 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,SelfDestructingSolverStorable14 [2021-08-21 13:06:26,338 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2021-08-21 13:06:26,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:26,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802416786] [2021-08-21 13:06:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:26,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:26,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:26,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802416786] [2021-08-21 13:06:26,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802416786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:26,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644879899] [2021-08-21 13:06:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:06:26,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:26,381 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) [2021-08-21 13:06:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 13:06:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 13:06:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:26,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644879899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:26,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:26,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 13:06:26,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914242104] [2021-08-21 13:06:26,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:06:26,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:06:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:06:26,725 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:26,803 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-08-21 13:06:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:06:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 13:06:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:26,812 INFO L225 Difference]: With dead ends: 3472 [2021-08-21 13:06:26,812 INFO L226 Difference]: Without dead ends: 3318 [2021-08-21 13:06:26,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:06:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-08-21 13:06:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-08-21 13:06:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-08-21 13:06:26,866 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-08-21 13:06:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:26,866 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-08-21 13:06:26,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-08-21 13:06:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 13:06:26,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:26,871 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:26,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:27,087 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,SelfDestructingSolverStorable15 [2021-08-21 13:06:27,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2021-08-21 13:06:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:27,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667645809] [2021-08-21 13:06:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:27,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:27,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:27,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667645809] [2021-08-21 13:06:27,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667645809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:27,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:06:27,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:06:27,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937350191] [2021-08-21 13:06:27,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:06:27,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:06:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:27,109 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-08-21 13:06:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:27,143 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-08-21 13:06:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:06:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-08-21 13:06:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:27,158 INFO L225 Difference]: With dead ends: 5761 [2021-08-21 13:06:27,158 INFO L226 Difference]: Without dead ends: 5510 [2021-08-21 13:06:27,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-08-21 13:06:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-08-21 13:06:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-08-21 13:06:27,244 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-08-21 13:06:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:27,245 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-08-21 13:06:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-08-21 13:06:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-08-21 13:06:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:27,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:27,254 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:27,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 13:06:27,254 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2021-08-21 13:06:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:27,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073751032] [2021-08-21 13:06:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:27,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:06:27,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:27,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073751032] [2021-08-21 13:06:27,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073751032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:27,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133094929] [2021-08-21 13:06:27,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:06:27,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:27,282 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) [2021-08-21 13:06:27,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 13:06:27,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:06:27,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:06:27,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133094929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:27,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:27,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 13:06:27,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235626420] [2021-08-21 13:06:27,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:27,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:27,758 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:28,058 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-08-21 13:06:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:06:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:28,101 INFO L225 Difference]: With dead ends: 17927 [2021-08-21 13:06:28,101 INFO L226 Difference]: Without dead ends: 15301 [2021-08-21 13:06:28,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:06:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-08-21 13:06:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-08-21 13:06:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-08-21 13:06:28,361 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-08-21 13:06:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:28,361 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-08-21 13:06:28,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-08-21 13:06:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:28,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:28,379 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:28,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:28,596 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,SelfDestructingSolverStorable17 [2021-08-21 13:06:28,597 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2021-08-21 13:06:28,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:28,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815945194] [2021-08-21 13:06:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:28,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:28,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:28,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815945194] [2021-08-21 13:06:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815945194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:28,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526060930] [2021-08-21 13:06:28,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:06:28,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:28,633 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) [2021-08-21 13:06:28,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 13:06:28,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:06:28,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:29,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526060930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:29,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:29,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 13:06:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535969562] [2021-08-21 13:06:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:29,062 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:29,438 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-08-21 13:06:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:06:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:29,497 INFO L225 Difference]: With dead ends: 21371 [2021-08-21 13:06:29,497 INFO L226 Difference]: Without dead ends: 20932 [2021-08-21 13:06:29,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:06:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-08-21 13:06:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-08-21 13:06:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-08-21 13:06:29,966 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-08-21 13:06:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:29,966 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-08-21 13:06:29,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-08-21 13:06:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:29,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:29,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:30,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:30,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:30,217 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2021-08-21 13:06:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:30,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744961770] [2021-08-21 13:06:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:30,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:30,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:30,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744961770] [2021-08-21 13:06:30,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744961770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:30,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287860797] [2021-08-21 13:06:30,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:06:30,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:30,247 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) [2021-08-21 13:06:30,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 13:06:30,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:06:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:30,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287860797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:30,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:30,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 13:06:30,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146451191] [2021-08-21 13:06:30,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:06:30,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:06:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:06:30,717 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:31,088 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-08-21 13:06:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:06:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:31,145 INFO L225 Difference]: With dead ends: 20596 [2021-08-21 13:06:31,145 INFO L226 Difference]: Without dead ends: 20518 [2021-08-21 13:06:31,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:06:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-08-21 13:06:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-08-21 13:06:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-08-21 13:06:31,620 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-08-21 13:06:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:31,620 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-08-21 13:06:31,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-08-21 13:06:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:31,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:31,659 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:31,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:31,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:31,873 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2021-08-21 13:06:31,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:31,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640810522] [2021-08-21 13:06:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:31,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:31,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:31,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640810522] [2021-08-21 13:06:31,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640810522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:31,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816168707] [2021-08-21 13:06:31,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:06:31,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:31,948 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) [2021-08-21 13:06:31,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 13:06:32,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:06:32,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816168707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:32,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 13:06:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950040428] [2021-08-21 13:06:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:06:32,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:06:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:06:32,438 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:32,805 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-08-21 13:06:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:06:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:32,864 INFO L225 Difference]: With dead ends: 22733 [2021-08-21 13:06:32,865 INFO L226 Difference]: Without dead ends: 21028 [2021-08-21 13:06:32,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:06:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-08-21 13:06:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-08-21 13:06:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-08-21 13:06:33,346 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-08-21 13:06:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-08-21 13:06:33,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-08-21 13:06:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:33,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:33,378 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:33,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:33,579 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,SelfDestructingSolverStorable20 [2021-08-21 13:06:33,579 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2021-08-21 13:06:33,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:33,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662713837] [2021-08-21 13:06:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:33,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:33,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:33,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662713837] [2021-08-21 13:06:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662713837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:33,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793728091] [2021-08-21 13:06:33,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:06:33,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:33,632 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) [2021-08-21 13:06:33,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 13:06:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793728091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:34,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:34,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 13:06:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068495126] [2021-08-21 13:06:34,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:06:34,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:06:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:06:34,177 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:34,605 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-08-21 13:06:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:06:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:34,775 INFO L225 Difference]: With dead ends: 31402 [2021-08-21 13:06:34,775 INFO L226 Difference]: Without dead ends: 31094 [2021-08-21 13:06:34,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:06:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-08-21 13:06:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-08-21 13:06:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-08-21 13:06:35,272 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-08-21 13:06:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:35,272 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-08-21 13:06:35,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-08-21 13:06:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:35,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:35,315 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:35,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:35,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:35,516 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2021-08-21 13:06:35,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:35,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824679768] [2021-08-21 13:06:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:35,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:35,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:35,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824679768] [2021-08-21 13:06:35,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824679768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:35,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346190539] [2021-08-21 13:06:35,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:06:35,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:35,556 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) [2021-08-21 13:06:35,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 13:06:36,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:06:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:36,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346190539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:36,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:36,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 13:06:36,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454110243] [2021-08-21 13:06:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:06:36,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:06:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:06:36,235 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:36,699 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-08-21 13:06:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:06:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:36,816 INFO L225 Difference]: With dead ends: 33709 [2021-08-21 13:06:36,816 INFO L226 Difference]: Without dead ends: 32656 [2021-08-21 13:06:36,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:06:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-08-21 13:06:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-08-21 13:06:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-08-21 13:06:37,658 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-08-21 13:06:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:37,658 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-08-21 13:06:37,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-08-21 13:06:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:06:37,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:37,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:37,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:37,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:37,923 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2021-08-21 13:06:37,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:37,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673021276] [2021-08-21 13:06:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:37,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:06:37,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:37,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673021276] [2021-08-21 13:06:37,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673021276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:37,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919968806] [2021-08-21 13:06:37,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:06:37,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:37,960 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) [2021-08-21 13:06:37,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 13:06:38,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:06:38,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:06:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:06:38,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919968806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:38,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 13:06:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723191913] [2021-08-21 13:06:38,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:06:38,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:06:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:06:38,572 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:38,976 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-08-21 13:06:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:06:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 13:06:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:39,079 INFO L225 Difference]: With dead ends: 31214 [2021-08-21 13:06:39,080 INFO L226 Difference]: Without dead ends: 31106 [2021-08-21 13:06:39,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:06:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-08-21 13:06:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-08-21 13:06:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-08-21 13:06:39,858 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-08-21 13:06:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:39,858 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-08-21 13:06:39,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-08-21 13:06:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 13:06:39,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:39,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:39,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:40,112 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,SelfDestructingSolverStorable23 [2021-08-21 13:06:40,112 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2021-08-21 13:06:40,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:40,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723399147] [2021-08-21 13:06:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:40,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-21 13:06:40,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:40,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723399147] [2021-08-21 13:06:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723399147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:40,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352088992] [2021-08-21 13:06:40,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:06:40,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:40,149 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) [2021-08-21 13:06:40,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 13:06:40,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:06:40,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:06:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 13:06:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352088992] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:40,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 13:06:40,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-21 13:06:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896789517] [2021-08-21 13:06:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:06:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:06:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:40,599 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2021-08-21 13:06:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:40,860 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-08-21 13:06:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:06:40,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 37 [2021-08-21 13:06:40,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:40,951 INFO L225 Difference]: With dead ends: 29524 [2021-08-21 13:06:40,952 INFO L226 Difference]: Without dead ends: 29524 [2021-08-21 13:06:40,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:06:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-08-21 13:06:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-08-21 13:06:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-08-21 13:06:41,569 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-08-21 13:06:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:41,569 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-08-21 13:06:41,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2021-08-21 13:06:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-08-21 13:06:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 13:06:41,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:41,619 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:41,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:41,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:41,819 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2021-08-21 13:06:41,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:41,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83901689] [2021-08-21 13:06:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:41,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 13:06:41,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:41,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83901689] [2021-08-21 13:06:41,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83901689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:41,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038820154] [2021-08-21 13:06:41,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:06:41,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:41,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:41,853 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) [2021-08-21 13:06:41,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 13:06:42,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:06:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:42,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:06:42,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 13:06:42,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038820154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:06:42,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 13:06:42,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-08-21 13:06:42,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312249836] [2021-08-21 13:06:42,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:06:42,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:06:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:06:42,506 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-08-21 13:06:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:42,676 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-08-21 13:06:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:06:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 37 [2021-08-21 13:06:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:42,769 INFO L225 Difference]: With dead ends: 30000 [2021-08-21 13:06:42,769 INFO L226 Difference]: Without dead ends: 30000 [2021-08-21 13:06:42,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:06:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-08-21 13:06:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-08-21 13:06:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-08-21 13:06:43,488 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-08-21 13:06:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:43,489 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-08-21 13:06:43,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-08-21 13:06:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-08-21 13:06:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 13:06:43,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:43,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:43,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:43,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:43,741 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2021-08-21 13:06:43,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:43,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090986380] [2021-08-21 13:06:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:43,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 13:06:43,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090986380] [2021-08-21 13:06:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090986380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230679650] [2021-08-21 13:06:43,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:06:43,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:43,765 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) [2021-08-21 13:06:43,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 13:06:44,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:06:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:06:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 13:06:44,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230679650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:44,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:44,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 13:06:44,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147105480] [2021-08-21 13:06:44,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:06:44,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:06:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:06:44,228 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:44,588 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-08-21 13:06:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:06:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 13:06:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:44,729 INFO L225 Difference]: With dead ends: 37294 [2021-08-21 13:06:44,729 INFO L226 Difference]: Without dead ends: 37294 [2021-08-21 13:06:44,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:06:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-08-21 13:06:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-08-21 13:06:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-08-21 13:06:45,738 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-08-21 13:06:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:45,738 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-08-21 13:06:45,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-08-21 13:06:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:06:45,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:45,824 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:45,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:46,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:46,025 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2021-08-21 13:06:46,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:46,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766588899] [2021-08-21 13:06:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:46,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:46,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:46,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766588899] [2021-08-21 13:06:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766588899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:46,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204098995] [2021-08-21 13:06:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:06:46,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:46,718 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) [2021-08-21 13:06:46,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 13:06:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:06:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:47,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:06:47,594 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 28 treesize of output 16 [2021-08-21 13:06:47,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:06:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:47,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204098995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:47,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:47,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:06:47,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985234640] [2021-08-21 13:06:47,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:06:47,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:06:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:06:47,929 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:49,684 INFO L93 Difference]: Finished difference Result 62289 states and 254360 transitions. [2021-08-21 13:06:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:06:49,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:06:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:49,923 INFO L225 Difference]: With dead ends: 62289 [2021-08-21 13:06:49,923 INFO L226 Difference]: Without dead ends: 62097 [2021-08-21 13:06:49,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1273.2ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:06:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62097 states. [2021-08-21 13:06:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62097 to 34913. [2021-08-21 13:06:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2021-08-21 13:06:51,206 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2021-08-21 13:06:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:51,207 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2021-08-21 13:06:51,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2021-08-21 13:06:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:06:51,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:51,287 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:51,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:06:51,488 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,SelfDestructingSolverStorable27 [2021-08-21 13:06:51,489 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2021-08-21 13:06:51,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:51,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913264726] [2021-08-21 13:06:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:51,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:52,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:52,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913264726] [2021-08-21 13:06:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913264726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:52,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281092558] [2021-08-21 13:06:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:06:52,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:52,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:52,152 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) [2021-08-21 13:06:52,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 13:06:52,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:06:52,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:06:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:53,122 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:06:53,122 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 28 treesize of output 16 [2021-08-21 13:06:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:06:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:53,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281092558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:53,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:53,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:06:53,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238908457] [2021-08-21 13:06:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:06:53,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:06:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:06:53,474 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:55,545 INFO L93 Difference]: Finished difference Result 63409 states and 258944 transitions. [2021-08-21 13:06:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:06:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:06:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:55,813 INFO L225 Difference]: With dead ends: 63409 [2021-08-21 13:06:55,814 INFO L226 Difference]: Without dead ends: 63193 [2021-08-21 13:06:55,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:06:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63193 states. [2021-08-21 13:06:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63193 to 35063. [2021-08-21 13:06:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2021-08-21 13:06:57,117 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2021-08-21 13:06:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:57,117 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2021-08-21 13:06:57,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2021-08-21 13:06:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:06:57,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:57,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:57,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 13:06:57,396 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,SelfDestructingSolverStorable28 [2021-08-21 13:06:57,397 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:06:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2021-08-21 13:06:57,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:57,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443961482] [2021-08-21 13:06:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:57,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:57,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:57,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443961482] [2021-08-21 13:06:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443961482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325571613] [2021-08-21 13:06:57,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:06:57,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:57,814 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) [2021-08-21 13:06:57,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 13:06:58,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:06:58,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 13:06:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:58,973 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 13:06:58,973 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 38 treesize of output 44 [2021-08-21 13:06:59,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:06:59,311 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 32 treesize of output 40 [2021-08-21 13:06:59,577 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 13:06:59,577 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 41 treesize of output 47 [2021-08-21 13:06:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:59,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325571613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:59,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:59,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 13:06:59,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356421705] [2021-08-21 13:06:59,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:06:59,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:06:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:06:59,897 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:02,485 INFO L93 Difference]: Finished difference Result 61244 states and 248903 transitions. [2021-08-21 13:07:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:07:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:02,856 INFO L225 Difference]: With dead ends: 61244 [2021-08-21 13:07:02,856 INFO L226 Difference]: Without dead ends: 61134 [2021-08-21 13:07:02,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1923.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:07:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61134 states. [2021-08-21 13:07:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61134 to 35258. [2021-08-21 13:07:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35258 states, 35257 states have (on average 4.134583203335508) internal successors, (145773), 35257 states have internal predecessors, (145773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35258 states to 35258 states and 145773 transitions. [2021-08-21 13:07:04,151 INFO L78 Accepts]: Start accepts. Automaton has 35258 states and 145773 transitions. Word has length 39 [2021-08-21 13:07:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:04,151 INFO L470 AbstractCegarLoop]: Abstraction has 35258 states and 145773 transitions. [2021-08-21 13:07:04,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 35258 states and 145773 transitions. [2021-08-21 13:07:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:04,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:04,273 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:04,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 13:07:04,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:04,486 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2021-08-21 13:07:04,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:04,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788729658] [2021-08-21 13:07:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:04,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:04,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:04,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788729658] [2021-08-21 13:07:04,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788729658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:04,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131404789] [2021-08-21 13:07:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:07:04,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:04,916 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) [2021-08-21 13:07:04,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 13:07:05,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:07:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:07:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:06,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:07:06,023 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 28 treesize of output 16 [2021-08-21 13:07:06,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 13:07:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:06,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131404789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:06,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:06,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:07:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297058192] [2021-08-21 13:07:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:07:06,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:07:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:07:06,299 INFO L87 Difference]: Start difference. First operand 35258 states and 145773 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:08,316 INFO L93 Difference]: Finished difference Result 81375 states and 332127 transitions. [2021-08-21 13:07:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:07:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:08,674 INFO L225 Difference]: With dead ends: 81375 [2021-08-21 13:07:08,674 INFO L226 Difference]: Without dead ends: 81320 [2021-08-21 13:07:08,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:07:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81320 states. [2021-08-21 13:07:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81320 to 35753. [2021-08-21 13:07:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35753 states, 35752 states have (on average 4.141138957261132) internal successors, (148054), 35752 states have internal predecessors, (148054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35753 states to 35753 states and 148054 transitions. [2021-08-21 13:07:10,410 INFO L78 Accepts]: Start accepts. Automaton has 35753 states and 148054 transitions. Word has length 39 [2021-08-21 13:07:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:10,410 INFO L470 AbstractCegarLoop]: Abstraction has 35753 states and 148054 transitions. [2021-08-21 13:07:10,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 35753 states and 148054 transitions. [2021-08-21 13:07:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:10,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:10,496 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:10,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 13:07:10,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:10,701 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2021-08-21 13:07:10,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:10,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530441189] [2021-08-21 13:07:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:10,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:11,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:11,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530441189] [2021-08-21 13:07:11,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530441189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:11,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797337841] [2021-08-21 13:07:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:07:11,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:11,168 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) [2021-08-21 13:07:11,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 13:07:12,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:07:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:12,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:07:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:12,436 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:07:12,437 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 38 treesize of output 54 [2021-08-21 13:07:12,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:07:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797337841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:12,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:12,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 13:07:12,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034223121] [2021-08-21 13:07:12,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:07:12,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:07:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:07:12,944 INFO L87 Difference]: Start difference. First operand 35753 states and 148054 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:15,141 INFO L93 Difference]: Finished difference Result 61389 states and 250239 transitions. [2021-08-21 13:07:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:07:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:15,389 INFO L225 Difference]: With dead ends: 61389 [2021-08-21 13:07:15,389 INFO L226 Difference]: Without dead ends: 61187 [2021-08-21 13:07:15,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1569.2ms TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:07:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61187 states. [2021-08-21 13:07:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61187 to 36168. [2021-08-21 13:07:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36168 states, 36167 states have (on average 4.135427323250477) internal successors, (149566), 36167 states have internal predecessors, (149566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36168 states to 36168 states and 149566 transitions. [2021-08-21 13:07:16,648 INFO L78 Accepts]: Start accepts. Automaton has 36168 states and 149566 transitions. Word has length 39 [2021-08-21 13:07:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:16,648 INFO L470 AbstractCegarLoop]: Abstraction has 36168 states and 149566 transitions. [2021-08-21 13:07:16,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 36168 states and 149566 transitions. [2021-08-21 13:07:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:16,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:16,740 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:16,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 13:07:16,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:16,945 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2021-08-21 13:07:16,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:16,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072863658] [2021-08-21 13:07:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:16,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:17,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:17,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072863658] [2021-08-21 13:07:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072863658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:17,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598787582] [2021-08-21 13:07:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:07:17,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:17,659 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) [2021-08-21 13:07:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 13:07:18,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:07:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 13:07:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:18,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:07:18,929 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 34 treesize of output 52 [2021-08-21 13:07:19,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-21 13:07:19,308 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 13:07:19,308 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 18 treesize of output 17 [2021-08-21 13:07:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:19,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598787582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:19,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:19,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-21 13:07:19,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332407105] [2021-08-21 13:07:19,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:07:19,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:07:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:07:19,372 INFO L87 Difference]: Start difference. First operand 36168 states and 149566 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:21,924 INFO L93 Difference]: Finished difference Result 62363 states and 254195 transitions. [2021-08-21 13:07:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:07:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:22,191 INFO L225 Difference]: With dead ends: 62363 [2021-08-21 13:07:22,191 INFO L226 Difference]: Without dead ends: 62235 [2021-08-21 13:07:22,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1666.1ms TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:07:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62235 states. [2021-08-21 13:07:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62235 to 36362. [2021-08-21 13:07:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36362 states, 36361 states have (on average 4.133439674376392) internal successors, (150296), 36361 states have internal predecessors, (150296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36362 states to 36362 states and 150296 transitions. [2021-08-21 13:07:23,438 INFO L78 Accepts]: Start accepts. Automaton has 36362 states and 150296 transitions. Word has length 39 [2021-08-21 13:07:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:23,438 INFO L470 AbstractCegarLoop]: Abstraction has 36362 states and 150296 transitions. [2021-08-21 13:07:23,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36362 states and 150296 transitions. [2021-08-21 13:07:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:23,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:23,521 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:23,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 13:07:23,724 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,SelfDestructingSolverStorable32 [2021-08-21 13:07:23,725 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 25 times [2021-08-21 13:07:23,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:23,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339030904] [2021-08-21 13:07:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:23,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:24,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:24,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339030904] [2021-08-21 13:07:24,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339030904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:24,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492662015] [2021-08-21 13:07:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:07:24,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:24,314 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) [2021-08-21 13:07:24,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:07:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:07:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:25,568 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:07:25,568 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 28 treesize of output 16 [2021-08-21 13:07:25,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 13:07:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492662015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:25,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:25,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:07:25,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318808224] [2021-08-21 13:07:25,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:07:25,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:07:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:07:25,832 INFO L87 Difference]: Start difference. First operand 36362 states and 150296 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:27,194 INFO L93 Difference]: Finished difference Result 68551 states and 281963 transitions. [2021-08-21 13:07:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:07:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:27,464 INFO L225 Difference]: With dead ends: 68551 [2021-08-21 13:07:27,464 INFO L226 Difference]: Without dead ends: 68496 [2021-08-21 13:07:27,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:07:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68496 states. [2021-08-21 13:07:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68496 to 36296. [2021-08-21 13:07:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36296 states, 36295 states have (on average 4.135087477613997) internal successors, (150083), 36295 states have internal predecessors, (150083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36296 states to 36296 states and 150083 transitions. [2021-08-21 13:07:28,883 INFO L78 Accepts]: Start accepts. Automaton has 36296 states and 150083 transitions. Word has length 39 [2021-08-21 13:07:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:28,883 INFO L470 AbstractCegarLoop]: Abstraction has 36296 states and 150083 transitions. [2021-08-21 13:07:28,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 36296 states and 150083 transitions. [2021-08-21 13:07:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:28,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:28,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:28,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:07:29,188 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,SelfDestructingSolverStorable33 [2021-08-21 13:07:29,189 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 847258595, now seen corresponding path program 26 times [2021-08-21 13:07:29,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:29,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275321561] [2021-08-21 13:07:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:29,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:29,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:29,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275321561] [2021-08-21 13:07:29,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275321561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:29,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934481869] [2021-08-21 13:07:29,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:07:29,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:29,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:29,864 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) [2021-08-21 13:07:29,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:07:30,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:07:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:07:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:31,213 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:07:31,213 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 28 treesize of output 16 [2021-08-21 13:07:31,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:07:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934481869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:31,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:07:31,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009621800] [2021-08-21 13:07:31,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:07:31,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:07:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:07:31,518 INFO L87 Difference]: Start difference. First operand 36296 states and 150083 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:33,347 INFO L93 Difference]: Finished difference Result 78071 states and 316818 transitions. [2021-08-21 13:07:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:07:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:33,645 INFO L225 Difference]: With dead ends: 78071 [2021-08-21 13:07:33,645 INFO L226 Difference]: Without dead ends: 77887 [2021-08-21 13:07:33,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1105.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:07:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77887 states. [2021-08-21 13:07:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77887 to 36268. [2021-08-21 13:07:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36268 states, 36267 states have (on average 4.135688091102104) internal successors, (149989), 36267 states have internal predecessors, (149989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36268 states to 36268 states and 149989 transitions. [2021-08-21 13:07:35,047 INFO L78 Accepts]: Start accepts. Automaton has 36268 states and 149989 transitions. Word has length 39 [2021-08-21 13:07:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 36268 states and 149989 transitions. [2021-08-21 13:07:35,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 36268 states and 149989 transitions. [2021-08-21 13:07:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:35,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:35,135 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:35,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 13:07:35,335 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,SelfDestructingSolverStorable34 [2021-08-21 13:07:35,336 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash -275859033, now seen corresponding path program 27 times [2021-08-21 13:07:35,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:35,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028270402] [2021-08-21 13:07:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:35,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:35,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:35,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028270402] [2021-08-21 13:07:35,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028270402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:35,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123507636] [2021-08-21 13:07:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:07:35,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:36,000 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) [2021-08-21 13:07:36,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:07:36,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:07:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:07:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:37,458 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 13:07:37,459 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 38 treesize of output 44 [2021-08-21 13:07:37,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:07:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:37,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123507636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:37,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:37,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-21 13:07:37,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80287479] [2021-08-21 13:07:37,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:07:37,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:07:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:07:37,885 INFO L87 Difference]: Start difference. First operand 36268 states and 149989 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:40,651 INFO L93 Difference]: Finished difference Result 76669 states and 310629 transitions. [2021-08-21 13:07:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:07:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:41,138 INFO L225 Difference]: With dead ends: 76669 [2021-08-21 13:07:41,139 INFO L226 Difference]: Without dead ends: 76397 [2021-08-21 13:07:41,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1615.4ms TimeCoverageRelationStatistics Valid=485, Invalid=2707, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:07:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76397 states. [2021-08-21 13:07:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76397 to 35787. [2021-08-21 13:07:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35787 states, 35786 states have (on average 4.1410048622366284) internal successors, (148190), 35786 states have internal predecessors, (148190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35787 states to 35787 states and 148190 transitions. [2021-08-21 13:07:42,645 INFO L78 Accepts]: Start accepts. Automaton has 35787 states and 148190 transitions. Word has length 39 [2021-08-21 13:07:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:42,645 INFO L470 AbstractCegarLoop]: Abstraction has 35787 states and 148190 transitions. [2021-08-21 13:07:42,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35787 states and 148190 transitions. [2021-08-21 13:07:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:42,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:42,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:42,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 13:07:42,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:42,936 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 28 times [2021-08-21 13:07:42,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:42,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326576040] [2021-08-21 13:07:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:42,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:43,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:43,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326576040] [2021-08-21 13:07:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326576040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:43,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682118646] [2021-08-21 13:07:43,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:07:43,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:43,356 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) [2021-08-21 13:07:43,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:07:44,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:07:44,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:07:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:44,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:07:44,991 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 33 treesize of output 21 [2021-08-21 13:07:45,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:07:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:45,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682118646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:45,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:45,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:07:45,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882233970] [2021-08-21 13:07:45,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:07:45,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:07:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:07:45,212 INFO L87 Difference]: Start difference. First operand 35787 states and 148190 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:46,772 INFO L93 Difference]: Finished difference Result 62909 states and 257374 transitions. [2021-08-21 13:07:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:07:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:47,019 INFO L225 Difference]: With dead ends: 62909 [2021-08-21 13:07:47,019 INFO L226 Difference]: Without dead ends: 62717 [2021-08-21 13:07:47,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:07:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62717 states. [2021-08-21 13:07:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62717 to 35811. [2021-08-21 13:07:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35811 states, 35810 states have (on average 4.140575258307735) internal successors, (148274), 35810 states have internal predecessors, (148274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35811 states to 35811 states and 148274 transitions. [2021-08-21 13:07:48,230 INFO L78 Accepts]: Start accepts. Automaton has 35811 states and 148274 transitions. Word has length 39 [2021-08-21 13:07:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:48,230 INFO L470 AbstractCegarLoop]: Abstraction has 35811 states and 148274 transitions. [2021-08-21 13:07:48,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 35811 states and 148274 transitions. [2021-08-21 13:07:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:48,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:48,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:48,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 13:07:48,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:07:48,514 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1514365043, now seen corresponding path program 29 times [2021-08-21 13:07:48,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:48,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944963660] [2021-08-21 13:07:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:48,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:49,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:49,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944963660] [2021-08-21 13:07:49,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944963660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:49,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653342500] [2021-08-21 13:07:49,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:07:49,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:49,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:49,163 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) [2021-08-21 13:07:49,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 13:07:50,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:07:50,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:07:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:50,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:07:50,853 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 39 treesize of output 57 [2021-08-21 13:07:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:07:51,076 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:07:51,076 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 31 treesize of output 47 [2021-08-21 13:07:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:51,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653342500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:51,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 13:07:51,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801979051] [2021-08-21 13:07:51,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:07:51,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:07:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:07:51,195 INFO L87 Difference]: Start difference. First operand 35811 states and 148274 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:07:54,722 INFO L93 Difference]: Finished difference Result 65491 states and 266916 transitions. [2021-08-21 13:07:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:07:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:07:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:07:54,987 INFO L225 Difference]: With dead ends: 65491 [2021-08-21 13:07:54,987 INFO L226 Difference]: Without dead ends: 65150 [2021-08-21 13:07:54,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2598.8ms TimeCoverageRelationStatistics Valid=805, Invalid=4451, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 13:07:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65150 states. [2021-08-21 13:07:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65150 to 36256. [2021-08-21 13:07:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36256 states, 36255 states have (on average 4.134933112674114) internal successors, (149912), 36255 states have internal predecessors, (149912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36256 states to 36256 states and 149912 transitions. [2021-08-21 13:07:56,169 INFO L78 Accepts]: Start accepts. Automaton has 36256 states and 149912 transitions. Word has length 39 [2021-08-21 13:07:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:07:56,169 INFO L470 AbstractCegarLoop]: Abstraction has 36256 states and 149912 transitions. [2021-08-21 13:07:56,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:07:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 36256 states and 149912 transitions. [2021-08-21 13:07:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:07:56,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:07:56,246 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:07:56,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 13:07:56,447 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,SelfDestructingSolverStorable37 [2021-08-21 13:07:56,447 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:07:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:07:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1604148193, now seen corresponding path program 30 times [2021-08-21 13:07:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:07:56,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883855364] [2021-08-21 13:07:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:07:56,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:07:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:57,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:57,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883855364] [2021-08-21 13:07:57,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883855364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:57,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118377394] [2021-08-21 13:07:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:07:57,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:57,127 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) [2021-08-21 13:07:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 13:07:58,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:07:58,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 13:07:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:07:58,913 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 13:07:58,914 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 43 treesize of output 32 [2021-08-21 13:07:58,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:07:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:59,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118377394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:59,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:07:59,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:07:59,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014423626] [2021-08-21 13:07:59,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:07:59,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:07:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:07:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:07:59,047 INFO L87 Difference]: Start difference. First operand 36256 states and 149912 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:01,036 INFO L93 Difference]: Finished difference Result 78346 states and 317655 transitions. [2021-08-21 13:08:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:08:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:01,334 INFO L225 Difference]: With dead ends: 78346 [2021-08-21 13:08:01,334 INFO L226 Difference]: Without dead ends: 78178 [2021-08-21 13:08:01,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:08:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78178 states. [2021-08-21 13:08:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78178 to 35997. [2021-08-21 13:08:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35997 states, 35996 states have (on average 4.138626514057117) internal successors, (148974), 35996 states have internal predecessors, (148974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35997 states to 35997 states and 148974 transitions. [2021-08-21 13:08:02,950 INFO L78 Accepts]: Start accepts. Automaton has 35997 states and 148974 transitions. Word has length 39 [2021-08-21 13:08:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:02,950 INFO L470 AbstractCegarLoop]: Abstraction has 35997 states and 148974 transitions. [2021-08-21 13:08:02,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35997 states and 148974 transitions. [2021-08-21 13:08:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:03,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:03,039 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:03,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 13:08:03,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:08:03,240 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:03,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1838065757, now seen corresponding path program 31 times [2021-08-21 13:08:03,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:03,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370073143] [2021-08-21 13:08:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:03,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:03,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:03,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370073143] [2021-08-21 13:08:03,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370073143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:03,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085973035] [2021-08-21 13:08:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:08:03,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:03,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:03,654 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) [2021-08-21 13:08:03,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 13:08:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:08:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:05,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:08:05,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:05,572 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 39 treesize of output 27 [2021-08-21 13:08:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:05,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085973035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:05,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:05,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:05,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281292730] [2021-08-21 13:08:05,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:05,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:05,662 INFO L87 Difference]: Start difference. First operand 35997 states and 148974 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:07,438 INFO L93 Difference]: Finished difference Result 79840 states and 324547 transitions. [2021-08-21 13:08:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:08:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:07,923 INFO L225 Difference]: With dead ends: 79840 [2021-08-21 13:08:07,924 INFO L226 Difference]: Without dead ends: 79688 [2021-08-21 13:08:07,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 994.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:08:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79688 states. [2021-08-21 13:08:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79688 to 36067. [2021-08-21 13:08:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36067 states, 36066 states have (on average 4.13946653357733) internal successors, (149294), 36066 states have internal predecessors, (149294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36067 states to 36067 states and 149294 transitions. [2021-08-21 13:08:09,346 INFO L78 Accepts]: Start accepts. Automaton has 36067 states and 149294 transitions. Word has length 39 [2021-08-21 13:08:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:09,346 INFO L470 AbstractCegarLoop]: Abstraction has 36067 states and 149294 transitions. [2021-08-21 13:08:09,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36067 states and 149294 transitions. [2021-08-21 13:08:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:09,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:09,428 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 13:08:09,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:08:09,633 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 32 times [2021-08-21 13:08:09,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:09,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923223473] [2021-08-21 13:08:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:09,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:10,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923223473] [2021-08-21 13:08:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923223473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332798523] [2021-08-21 13:08:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:08:10,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:10,081 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) [2021-08-21 13:08:10,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 13:08:11,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:08:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:11,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:08:11,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:12,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:08:12,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:12,094 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 39 treesize of output 27 [2021-08-21 13:08:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332798523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:12,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:12,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044187399] [2021-08-21 13:08:12,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:12,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:12,193 INFO L87 Difference]: Start difference. First operand 36067 states and 149294 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:13,669 INFO L93 Difference]: Finished difference Result 66515 states and 271677 transitions. [2021-08-21 13:08:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:08:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:14,090 INFO L225 Difference]: With dead ends: 66515 [2021-08-21 13:08:14,090 INFO L226 Difference]: Without dead ends: 66425 [2021-08-21 13:08:14,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:08:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66425 states. [2021-08-21 13:08:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66425 to 36065. [2021-08-21 13:08:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36065 states, 36064 states have (on average 4.142413487133984) internal successors, (149392), 36064 states have internal predecessors, (149392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36065 states to 36065 states and 149392 transitions. [2021-08-21 13:08:15,458 INFO L78 Accepts]: Start accepts. Automaton has 36065 states and 149392 transitions. Word has length 39 [2021-08-21 13:08:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:15,470 INFO L470 AbstractCegarLoop]: Abstraction has 36065 states and 149392 transitions. [2021-08-21 13:08:15,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 36065 states and 149392 transitions. [2021-08-21 13:08:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:15,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:15,578 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:15,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 13:08:15,779 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,SelfDestructingSolverStorable40 [2021-08-21 13:08:15,779 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1560500787, now seen corresponding path program 33 times [2021-08-21 13:08:15,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:15,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127001711] [2021-08-21 13:08:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:15,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:16,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:16,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127001711] [2021-08-21 13:08:16,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127001711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:16,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702017709] [2021-08-21 13:08:16,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:08:16,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:16,208 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) [2021-08-21 13:08:16,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 13:08:17,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:08:17,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 13:08:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:08:18,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:08:18,253 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 32 treesize of output 40 [2021-08-21 13:08:18,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:08:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-08-21 13:08:18,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:08:18,577 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 25 treesize of output 29 [2021-08-21 13:08:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702017709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:18,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-21 13:08:18,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062527790] [2021-08-21 13:08:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 13:08:18,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 13:08:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:08:18,855 INFO L87 Difference]: Start difference. First operand 36065 states and 149392 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:23,662 INFO L93 Difference]: Finished difference Result 62921 states and 254607 transitions. [2021-08-21 13:08:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 13:08:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:23,904 INFO L225 Difference]: With dead ends: 62921 [2021-08-21 13:08:23,904 INFO L226 Difference]: Without dead ends: 62773 [2021-08-21 13:08:23,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 3522.7ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 13:08:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62773 states. [2021-08-21 13:08:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62773 to 36501. [2021-08-21 13:08:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36501 states, 36500 states have (on average 4.138684931506849) internal successors, (151062), 36500 states have internal predecessors, (151062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36501 states to 36501 states and 151062 transitions. [2021-08-21 13:08:25,126 INFO L78 Accepts]: Start accepts. Automaton has 36501 states and 151062 transitions. Word has length 39 [2021-08-21 13:08:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:25,126 INFO L470 AbstractCegarLoop]: Abstraction has 36501 states and 151062 transitions. [2021-08-21 13:08:25,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36501 states and 151062 transitions. [2021-08-21 13:08:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:25,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:25,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:25,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 13:08:25,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:25,417 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1052629599, now seen corresponding path program 34 times [2021-08-21 13:08:25,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:25,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207206162] [2021-08-21 13:08:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:25,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:26,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207206162] [2021-08-21 13:08:26,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207206162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732499626] [2021-08-21 13:08:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:08:26,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:26,087 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) [2021-08-21 13:08:26,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 13:08:27,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:08:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:08:27,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:28,006 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:28,006 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 28 treesize of output 16 [2021-08-21 13:08:28,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:08:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:28,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732499626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:28,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:28,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:28,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177723512] [2021-08-21 13:08:28,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:28,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:28,235 INFO L87 Difference]: Start difference. First operand 36501 states and 151062 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:30,204 INFO L93 Difference]: Finished difference Result 78456 states and 318871 transitions. [2021-08-21 13:08:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:08:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:30,691 INFO L225 Difference]: With dead ends: 78456 [2021-08-21 13:08:30,691 INFO L226 Difference]: Without dead ends: 78240 [2021-08-21 13:08:30,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1163.9ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:08:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78240 states. [2021-08-21 13:08:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78240 to 36339. [2021-08-21 13:08:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36339 states, 36338 states have (on average 4.140899334030491) internal successors, (150472), 36338 states have internal predecessors, (150472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36339 states to 36339 states and 150472 transitions. [2021-08-21 13:08:32,235 INFO L78 Accepts]: Start accepts. Automaton has 36339 states and 150472 transitions. Word has length 39 [2021-08-21 13:08:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:32,235 INFO L470 AbstractCegarLoop]: Abstraction has 36339 states and 150472 transitions. [2021-08-21 13:08:32,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 36339 states and 150472 transitions. [2021-08-21 13:08:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:32,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:32,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:32,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 13:08:32,527 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,SelfDestructingSolverStorable42 [2021-08-21 13:08:32,527 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 251354829, now seen corresponding path program 35 times [2021-08-21 13:08:32,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:32,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525727413] [2021-08-21 13:08:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:32,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:32,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:32,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525727413] [2021-08-21 13:08:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525727413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:32,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298853734] [2021-08-21 13:08:32,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:08:32,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:32,913 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) [2021-08-21 13:08:32,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:08:34,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:08:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:34,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 13:08:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:34,938 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:08:34,938 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 38 treesize of output 54 [2021-08-21 13:08:35,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 13:08:35,151 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:08:35,152 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 31 treesize of output 47 [2021-08-21 13:08:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:35,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298853734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:35,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:35,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 13:08:35,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649999768] [2021-08-21 13:08:35,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:08:35,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:08:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:08:35,253 INFO L87 Difference]: Start difference. First operand 36339 states and 150472 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:38,132 INFO L93 Difference]: Finished difference Result 66197 states and 270596 transitions. [2021-08-21 13:08:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 13:08:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:38,513 INFO L225 Difference]: With dead ends: 66197 [2021-08-21 13:08:38,513 INFO L226 Difference]: Without dead ends: 66087 [2021-08-21 13:08:38,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1784.5ms TimeCoverageRelationStatistics Valid=632, Invalid=4060, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 13:08:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66087 states. [2021-08-21 13:08:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66087 to 36697. [2021-08-21 13:08:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36697 states, 36696 states have (on average 4.138761717898409) internal successors, (151876), 36696 states have internal predecessors, (151876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36697 states to 36697 states and 151876 transitions. [2021-08-21 13:08:39,801 INFO L78 Accepts]: Start accepts. Automaton has 36697 states and 151876 transitions. Word has length 39 [2021-08-21 13:08:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:39,801 INFO L470 AbstractCegarLoop]: Abstraction has 36697 states and 151876 transitions. [2021-08-21 13:08:39,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 36697 states and 151876 transitions. [2021-08-21 13:08:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:39,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:39,918 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:39,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 13:08:40,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:40,118 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash -475176097, now seen corresponding path program 36 times [2021-08-21 13:08:40,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:40,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466329007] [2021-08-21 13:08:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:40,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:40,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:40,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466329007] [2021-08-21 13:08:40,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466329007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:40,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387699687] [2021-08-21 13:08:40,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:08:40,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:40,502 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) [2021-08-21 13:08:40,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:08:42,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:08:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 13:08:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:42,609 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:42,609 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 28 treesize of output 16 [2021-08-21 13:08:42,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 13:08:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:42,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387699687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:42,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:42,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:42,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964159479] [2021-08-21 13:08:42,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:42,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:42,755 INFO L87 Difference]: Start difference. First operand 36697 states and 151876 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:44,241 INFO L93 Difference]: Finished difference Result 83068 states and 339285 transitions. [2021-08-21 13:08:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:08:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:44,721 INFO L225 Difference]: With dead ends: 83068 [2021-08-21 13:08:44,721 INFO L226 Difference]: Without dead ends: 83013 [2021-08-21 13:08:44,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:08:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83013 states. [2021-08-21 13:08:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83013 to 36189. [2021-08-21 13:08:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36189 states, 36188 states have (on average 4.142257101801702) internal successors, (149900), 36188 states have internal predecessors, (149900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36189 states to 36189 states and 149900 transitions. [2021-08-21 13:08:46,161 INFO L78 Accepts]: Start accepts. Automaton has 36189 states and 149900 transitions. Word has length 39 [2021-08-21 13:08:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:46,161 INFO L470 AbstractCegarLoop]: Abstraction has 36189 states and 149900 transitions. [2021-08-21 13:08:46,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 36189 states and 149900 transitions. [2021-08-21 13:08:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:46,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:46,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:46,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 13:08:46,440 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,SelfDestructingSolverStorable44 [2021-08-21 13:08:46,440 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash 892867017, now seen corresponding path program 37 times [2021-08-21 13:08:46,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:46,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14854749] [2021-08-21 13:08:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:46,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:46,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:46,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14854749] [2021-08-21 13:08:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14854749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:46,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232096758] [2021-08-21 13:08:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:08:46,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:46,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:46,927 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) [2021-08-21 13:08:46,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:08:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:08:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:49,103 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-08-21 13:08:49,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:08:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232096758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:49,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575533665] [2021-08-21 13:08:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:49,262 INFO L87 Difference]: Start difference. First operand 36189 states and 149900 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:50,757 INFO L93 Difference]: Finished difference Result 64715 states and 264452 transitions. [2021-08-21 13:08:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:08:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:51,150 INFO L225 Difference]: With dead ends: 64715 [2021-08-21 13:08:51,150 INFO L226 Difference]: Without dead ends: 64467 [2021-08-21 13:08:51,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:08:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64467 states. [2021-08-21 13:08:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64467 to 36375. [2021-08-21 13:08:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36375 states, 36374 states have (on average 4.1403200087974925) internal successors, (150600), 36374 states have internal predecessors, (150600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36375 states to 36375 states and 150600 transitions. [2021-08-21 13:08:52,442 INFO L78 Accepts]: Start accepts. Automaton has 36375 states and 150600 transitions. Word has length 39 [2021-08-21 13:08:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:52,443 INFO L470 AbstractCegarLoop]: Abstraction has 36375 states and 150600 transitions. [2021-08-21 13:08:52,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 36375 states and 150600 transitions. [2021-08-21 13:08:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:52,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:52,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:52,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:08:52,752 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,SelfDestructingSolverStorable45 [2021-08-21 13:08:52,752 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash 255706527, now seen corresponding path program 38 times [2021-08-21 13:08:52,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:52,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851320692] [2021-08-21 13:08:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:52,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:53,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:53,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851320692] [2021-08-21 13:08:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851320692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:53,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9504661] [2021-08-21 13:08:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:08:53,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:53,191 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) [2021-08-21 13:08:53,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:08:54,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:08:54,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:08:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:08:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:55,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:08:55,506 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:08:55,506 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 39 treesize of output 27 [2021-08-21 13:08:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9504661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:55,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:08:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:08:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471798729] [2021-08-21 13:08:55,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:08:55,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:08:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:08:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:08:55,585 INFO L87 Difference]: Start difference. First operand 36375 states and 150600 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:08:57,284 INFO L93 Difference]: Finished difference Result 80659 states and 327927 transitions. [2021-08-21 13:08:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:08:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:08:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:08:57,754 INFO L225 Difference]: With dead ends: 80659 [2021-08-21 13:08:57,755 INFO L226 Difference]: Without dead ends: 80491 [2021-08-21 13:08:57,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1004.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:08:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80491 states. [2021-08-21 13:08:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80491 to 36445. [2021-08-21 13:08:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36445 states, 36444 states have (on average 4.141148062781253) internal successors, (150920), 36444 states have internal predecessors, (150920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36445 states to 36445 states and 150920 transitions. [2021-08-21 13:08:59,182 INFO L78 Accepts]: Start accepts. Automaton has 36445 states and 150920 transitions. Word has length 39 [2021-08-21 13:08:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:08:59,182 INFO L470 AbstractCegarLoop]: Abstraction has 36445 states and 150920 transitions. [2021-08-21 13:08:59,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:08:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36445 states and 150920 transitions. [2021-08-21 13:08:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:08:59,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:08:59,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:08:59,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 13:08:59,462 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,SelfDestructingSolverStorable46 [2021-08-21 13:08:59,462 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:08:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:08:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash 459627273, now seen corresponding path program 39 times [2021-08-21 13:08:59,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:08:59,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514565457] [2021-08-21 13:08:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:08:59,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:08:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:08:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:08:59,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:08:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514565457] [2021-08-21 13:08:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514565457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:08:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452075058] [2021-08-21 13:08:59,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:08:59,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:08:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:08:59,873 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) [2021-08-21 13:08:59,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:09:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 13:09:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 13:09:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:02,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:02,422 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 37 treesize of output 45 [2021-08-21 13:09:02,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:02,489 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 60 treesize of output 46 [2021-08-21 13:09:02,545 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 13:09:02,545 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 5 [2021-08-21 13:09:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:02,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452075058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:02,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:02,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 13:09:02,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444251926] [2021-08-21 13:09:02,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:09:02,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:09:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:09:02,743 INFO L87 Difference]: Start difference. First operand 36445 states and 150920 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:04,884 INFO L93 Difference]: Finished difference Result 59731 states and 242803 transitions. [2021-08-21 13:09:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:09:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:05,129 INFO L225 Difference]: With dead ends: 59731 [2021-08-21 13:09:05,129 INFO L226 Difference]: Without dead ends: 59583 [2021-08-21 13:09:05,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1388.4ms TimeCoverageRelationStatistics Valid=476, Invalid=2176, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:09:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59583 states. [2021-08-21 13:09:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59583 to 36467. [2021-08-21 13:09:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36467 states, 36466 states have (on average 4.140953216695004) internal successors, (151004), 36466 states have internal predecessors, (151004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36467 states to 36467 states and 151004 transitions. [2021-08-21 13:09:06,362 INFO L78 Accepts]: Start accepts. Automaton has 36467 states and 151004 transitions. Word has length 39 [2021-08-21 13:09:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:06,363 INFO L470 AbstractCegarLoop]: Abstraction has 36467 states and 151004 transitions. [2021-08-21 13:09:06,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36467 states and 151004 transitions. [2021-08-21 13:09:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:06,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:06,453 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:06,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 13:09:06,653 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,SelfDestructingSolverStorable47 [2021-08-21 13:09:06,653 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -18199585, now seen corresponding path program 40 times [2021-08-21 13:09:06,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:06,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058214172] [2021-08-21 13:09:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:06,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:07,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:07,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058214172] [2021-08-21 13:09:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058214172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:07,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477382722] [2021-08-21 13:09:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:09:07,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:07,371 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) [2021-08-21 13:09:07,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:09:09,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:09:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:09:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:09,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:09:09,761 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:09,761 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 39 treesize of output 27 [2021-08-21 13:09:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:09,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477382722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:09,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:09,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:09:09,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977962541] [2021-08-21 13:09:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:09:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:09:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:09:09,846 INFO L87 Difference]: Start difference. First operand 36467 states and 151004 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:11,651 INFO L93 Difference]: Finished difference Result 80846 states and 329167 transitions. [2021-08-21 13:09:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:09:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:12,141 INFO L225 Difference]: With dead ends: 80846 [2021-08-21 13:09:12,141 INFO L226 Difference]: Without dead ends: 80764 [2021-08-21 13:09:12,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:09:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80764 states. [2021-08-21 13:09:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80764 to 36189. [2021-08-21 13:09:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36189 states, 36188 states have (on average 4.142257101801702) internal successors, (149900), 36188 states have internal predecessors, (149900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36189 states to 36189 states and 149900 transitions. [2021-08-21 13:09:13,670 INFO L78 Accepts]: Start accepts. Automaton has 36189 states and 149900 transitions. Word has length 39 [2021-08-21 13:09:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:13,670 INFO L470 AbstractCegarLoop]: Abstraction has 36189 states and 149900 transitions. [2021-08-21 13:09:13,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 36189 states and 149900 transitions. [2021-08-21 13:09:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:13,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:13,754 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:13,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:13,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 13:09:13,954 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:13,954 INFO L82 PathProgramCache]: Analyzing trace with hash -249818799, now seen corresponding path program 41 times [2021-08-21 13:09:13,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:13,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412077237] [2021-08-21 13:09:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:13,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:14,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:14,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412077237] [2021-08-21 13:09:14,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412077237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:14,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216805058] [2021-08-21 13:09:14,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:09:14,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:14,335 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) [2021-08-21 13:09:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:09:16,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:09:16,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 13:09:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:16,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:16,951 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 47 treesize of output 55 [2021-08-21 13:09:17,072 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:09:17,072 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 67 treesize of output 79 [2021-08-21 13:09:17,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:17,312 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 20 treesize of output 24 [2021-08-21 13:09:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:17,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216805058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:17,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:17,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:09:17,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259243377] [2021-08-21 13:09:17,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:09:17,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:09:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:09:17,424 INFO L87 Difference]: Start difference. First operand 36189 states and 149900 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:20,412 INFO L93 Difference]: Finished difference Result 63950 states and 261211 transitions. [2021-08-21 13:09:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:09:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:20,680 INFO L225 Difference]: With dead ends: 63950 [2021-08-21 13:09:20,680 INFO L226 Difference]: Without dead ends: 63840 [2021-08-21 13:09:20,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1954.4ms TimeCoverageRelationStatistics Valid=599, Invalid=3561, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 13:09:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63840 states. [2021-08-21 13:09:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63840 to 36725. [2021-08-21 13:09:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36725 states, 36724 states have (on average 4.139636205206404) internal successors, (152024), 36724 states have internal predecessors, (152024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36725 states to 36725 states and 152024 transitions. [2021-08-21 13:09:21,869 INFO L78 Accepts]: Start accepts. Automaton has 36725 states and 152024 transitions. Word has length 39 [2021-08-21 13:09:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:21,869 INFO L470 AbstractCegarLoop]: Abstraction has 36725 states and 152024 transitions. [2021-08-21 13:09:21,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 36725 states and 152024 transitions. [2021-08-21 13:09:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:22,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:22,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:22,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:22,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:09:22,441 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1092504985, now seen corresponding path program 42 times [2021-08-21 13:09:22,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:22,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979681025] [2021-08-21 13:09:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:22,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:22,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:22,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979681025] [2021-08-21 13:09:22,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979681025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:22,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343198939] [2021-08-21 13:09:22,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:09:22,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:22,836 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) [2021-08-21 13:09:22,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:09:24,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:09:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 13:09:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:25,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:09:25,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:25,274 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 34 treesize of output 22 [2021-08-21 13:09:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343198939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:25,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:25,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:09:25,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321044899] [2021-08-21 13:09:25,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:09:25,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:09:25,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:09:25,371 INFO L87 Difference]: Start difference. First operand 36725 states and 152024 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:27,030 INFO L93 Difference]: Finished difference Result 87115 states and 355898 transitions. [2021-08-21 13:09:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:09:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:27,397 INFO L225 Difference]: With dead ends: 87115 [2021-08-21 13:09:27,397 INFO L226 Difference]: Without dead ends: 87060 [2021-08-21 13:09:27,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:09:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87060 states. [2021-08-21 13:09:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87060 to 36637. [2021-08-21 13:09:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36637 states, 36636 states have (on average 4.145103177202752) internal successors, (151860), 36636 states have internal predecessors, (151860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36637 states to 36637 states and 151860 transitions. [2021-08-21 13:09:29,133 INFO L78 Accepts]: Start accepts. Automaton has 36637 states and 151860 transitions. Word has length 39 [2021-08-21 13:09:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:29,133 INFO L470 AbstractCegarLoop]: Abstraction has 36637 states and 151860 transitions. [2021-08-21 13:09:29,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36637 states and 151860 transitions. [2021-08-21 13:09:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:29,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:29,220 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:29,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:29,421 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,SelfDestructingSolverStorable50 [2021-08-21 13:09:29,421 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1106922573, now seen corresponding path program 43 times [2021-08-21 13:09:29,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:29,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659547845] [2021-08-21 13:09:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:29,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:29,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:29,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659547845] [2021-08-21 13:09:29,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659547845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:29,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310675978] [2021-08-21 13:09:29,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:09:29,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:29,799 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) [2021-08-21 13:09:29,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:09:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:31,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:09:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:09:32,401 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:32,401 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 39 treesize of output 27 [2021-08-21 13:09:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:32,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310675978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:32,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:32,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:09:32,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211101002] [2021-08-21 13:09:32,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:09:32,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:09:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:09:32,483 INFO L87 Difference]: Start difference. First operand 36637 states and 151860 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:33,890 INFO L93 Difference]: Finished difference Result 70281 states and 289003 transitions. [2021-08-21 13:09:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:09:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:34,191 INFO L225 Difference]: With dead ends: 70281 [2021-08-21 13:09:34,191 INFO L226 Difference]: Without dead ends: 70226 [2021-08-21 13:09:34,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:09:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70226 states. [2021-08-21 13:09:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70226 to 36885. [2021-08-21 13:09:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36885 states, 36884 states have (on average 4.146730289556447) internal successors, (152948), 36884 states have internal predecessors, (152948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36885 states to 36885 states and 152948 transitions. [2021-08-21 13:09:35,628 INFO L78 Accepts]: Start accepts. Automaton has 36885 states and 152948 transitions. Word has length 39 [2021-08-21 13:09:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 36885 states and 152948 transitions. [2021-08-21 13:09:35,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 36885 states and 152948 transitions. [2021-08-21 13:09:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:35,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:35,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:35,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:35,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:35,919 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1698692599, now seen corresponding path program 44 times [2021-08-21 13:09:35,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:35,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120043119] [2021-08-21 13:09:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:35,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:36,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:36,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120043119] [2021-08-21 13:09:36,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120043119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:36,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95912537] [2021-08-21 13:09:36,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:09:36,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:36,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:36,308 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) [2021-08-21 13:09:36,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:09:38,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:09:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:09:38,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:09:39,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:39,023 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 39 treesize of output 27 [2021-08-21 13:09:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:39,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95912537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:39,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:39,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:09:39,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068769467] [2021-08-21 13:09:39,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:09:39,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:09:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:09:39,106 INFO L87 Difference]: Start difference. First operand 36885 states and 152948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:40,500 INFO L93 Difference]: Finished difference Result 69491 states and 285830 transitions. [2021-08-21 13:09:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:09:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:40,755 INFO L225 Difference]: With dead ends: 69491 [2021-08-21 13:09:40,756 INFO L226 Difference]: Without dead ends: 69436 [2021-08-21 13:09:40,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:09:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69436 states. [2021-08-21 13:09:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69436 to 37017. [2021-08-21 13:09:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37017 states, 37016 states have (on average 4.149719040414956) internal successors, (153606), 37016 states have internal predecessors, (153606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37017 states to 37017 states and 153606 transitions. [2021-08-21 13:09:41,990 INFO L78 Accepts]: Start accepts. Automaton has 37017 states and 153606 transitions. Word has length 39 [2021-08-21 13:09:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:41,990 INFO L470 AbstractCegarLoop]: Abstraction has 37017 states and 153606 transitions. [2021-08-21 13:09:41,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 37017 states and 153606 transitions. [2021-08-21 13:09:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:42,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:42,070 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:42,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:42,271 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,SelfDestructingSolverStorable52 [2021-08-21 13:09:42,271 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2139636749, now seen corresponding path program 45 times [2021-08-21 13:09:42,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:42,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484590618] [2021-08-21 13:09:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:42,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:43,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:43,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484590618] [2021-08-21 13:09:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484590618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:43,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968458645] [2021-08-21 13:09:43,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:09:43,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:43,005 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) [2021-08-21 13:09:43,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:09:45,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:09:45,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 13:09:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:45,622 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 13:09:45,623 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 32 treesize of output 16 [2021-08-21 13:09:45,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:45,869 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 35 treesize of output 43 [2021-08-21 13:09:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968458645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:46,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:46,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 13:09:46,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400339697] [2021-08-21 13:09:46,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:09:46,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:09:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:09:46,053 INFO L87 Difference]: Start difference. First operand 37017 states and 153606 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:47,387 INFO L93 Difference]: Finished difference Result 65045 states and 265134 transitions. [2021-08-21 13:09:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:09:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:47,783 INFO L225 Difference]: With dead ends: 65045 [2021-08-21 13:09:47,783 INFO L226 Difference]: Without dead ends: 64955 [2021-08-21 13:09:47,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1124.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1235, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:09:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64955 states. [2021-08-21 13:09:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64955 to 37326. [2021-08-21 13:09:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37326 states, 37325 states have (on average 4.14569323509712) internal successors, (154738), 37325 states have internal predecessors, (154738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37326 states to 37326 states and 154738 transitions. [2021-08-21 13:09:48,889 INFO L78 Accepts]: Start accepts. Automaton has 37326 states and 154738 transitions. Word has length 39 [2021-08-21 13:09:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 37326 states and 154738 transitions. [2021-08-21 13:09:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37326 states and 154738 transitions. [2021-08-21 13:09:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:49,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:49,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:49,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:49,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:49,411 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash 457799839, now seen corresponding path program 46 times [2021-08-21 13:09:49,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:49,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53954703] [2021-08-21 13:09:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:49,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:49,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:49,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53954703] [2021-08-21 13:09:49,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53954703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:49,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917644543] [2021-08-21 13:09:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:09:49,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:49,891 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) [2021-08-21 13:09:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:09:52,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:09:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:09:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:09:52,536 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:09:52,537 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 28 treesize of output 16 [2021-08-21 13:09:52,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:09:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917644543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:52,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:09:52,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:09:52,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996467769] [2021-08-21 13:09:52,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:09:52,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:09:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:09:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:09:52,808 INFO L87 Difference]: Start difference. First operand 37326 states and 154738 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:09:54,563 INFO L93 Difference]: Finished difference Result 79198 states and 322175 transitions. [2021-08-21 13:09:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:09:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:09:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:09:54,908 INFO L225 Difference]: With dead ends: 79198 [2021-08-21 13:09:54,908 INFO L226 Difference]: Without dead ends: 79014 [2021-08-21 13:09:54,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1079.0ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:09:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79014 states. [2021-08-21 13:09:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79014 to 37136. [2021-08-21 13:09:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37136 states, 37135 states have (on average 4.148916116870876) internal successors, (154070), 37135 states have internal predecessors, (154070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37136 states to 37136 states and 154070 transitions. [2021-08-21 13:09:56,346 INFO L78 Accepts]: Start accepts. Automaton has 37136 states and 154070 transitions. Word has length 39 [2021-08-21 13:09:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:09:56,346 INFO L470 AbstractCegarLoop]: Abstraction has 37136 states and 154070 transitions. [2021-08-21 13:09:56,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:09:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37136 states and 154070 transitions. [2021-08-21 13:09:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:09:56,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:09:56,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:09:56,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:09:56,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:56,888 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:09:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:09:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1905719185, now seen corresponding path program 47 times [2021-08-21 13:09:56,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:09:56,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231767801] [2021-08-21 13:09:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:09:56,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:09:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:09:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:09:57,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:09:57,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231767801] [2021-08-21 13:09:57,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231767801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:09:57,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639752093] [2021-08-21 13:09:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:09:57,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:09:57,317 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) [2021-08-21 13:09:57,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:09:59,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:09:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:09:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 13:09:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:00,137 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:10:00,137 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 46 treesize of output 62 [2021-08-21 13:10:00,650 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:10:00,650 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 50 treesize of output 45 [2021-08-21 13:10:00,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:00,699 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 25 treesize of output 29 [2021-08-21 13:10:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:00,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639752093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:00,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:00,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:10:00,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651995152] [2021-08-21 13:10:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:10:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:10:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:10:00,819 INFO L87 Difference]: Start difference. First operand 37136 states and 154070 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:05,114 INFO L93 Difference]: Finished difference Result 72350 states and 295681 transitions. [2021-08-21 13:10:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:10:05,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:05,413 INFO L225 Difference]: With dead ends: 72350 [2021-08-21 13:10:05,413 INFO L226 Difference]: Without dead ends: 72129 [2021-08-21 13:10:05,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2376.8ms TimeCoverageRelationStatistics Valid=660, Invalid=3630, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:10:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72129 states. [2021-08-21 13:10:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72129 to 37649. [2021-08-21 13:10:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37649 states, 37648 states have (on average 4.143115172120697) internal successors, (155980), 37648 states have internal predecessors, (155980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37649 states to 37649 states and 155980 transitions. [2021-08-21 13:10:06,827 INFO L78 Accepts]: Start accepts. Automaton has 37649 states and 155980 transitions. Word has length 39 [2021-08-21 13:10:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:06,827 INFO L470 AbstractCegarLoop]: Abstraction has 37649 states and 155980 transitions. [2021-08-21 13:10:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37649 states and 155980 transitions. [2021-08-21 13:10:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:07,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:07,146 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:07,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:10:07,368 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,SelfDestructingSolverStorable55 [2021-08-21 13:10:07,368 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash -577392495, now seen corresponding path program 48 times [2021-08-21 13:10:07,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:07,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946101722] [2021-08-21 13:10:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:07,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:07,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946101722] [2021-08-21 13:10:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946101722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15979801] [2021-08-21 13:10:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:10:07,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:07,795 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) [2021-08-21 13:10:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:10:10,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:10:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 13:10:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:10,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:10,630 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 34 treesize of output 52 [2021-08-21 13:10:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 13:10:10,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:10,861 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 20 treesize of output 24 [2021-08-21 13:10:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:10,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15979801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:10,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:10,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 13:10:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002185647] [2021-08-21 13:10:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:10:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:10:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:10:10,955 INFO L87 Difference]: Start difference. First operand 37649 states and 155980 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:13,478 INFO L93 Difference]: Finished difference Result 61811 states and 252390 transitions. [2021-08-21 13:10:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:10:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:13,717 INFO L225 Difference]: With dead ends: 61811 [2021-08-21 13:10:13,717 INFO L226 Difference]: Without dead ends: 61701 [2021-08-21 13:10:13,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1533.9ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:10:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61701 states. [2021-08-21 13:10:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61701 to 37978. [2021-08-21 13:10:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37978 states, 37977 states have (on average 4.139426494983806) internal successors, (157203), 37977 states have internal predecessors, (157203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37978 states to 37978 states and 157203 transitions. [2021-08-21 13:10:15,000 INFO L78 Accepts]: Start accepts. Automaton has 37978 states and 157203 transitions. Word has length 39 [2021-08-21 13:10:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:15,000 INFO L470 AbstractCegarLoop]: Abstraction has 37978 states and 157203 transitions. [2021-08-21 13:10:15,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 37978 states and 157203 transitions. [2021-08-21 13:10:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:15,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:15,298 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:15,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:10:15,518 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,SelfDestructingSolverStorable56 [2021-08-21 13:10:15,518 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash 825565731, now seen corresponding path program 49 times [2021-08-21 13:10:15,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:15,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511054319] [2021-08-21 13:10:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:15,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:15,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:15,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511054319] [2021-08-21 13:10:15,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511054319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:15,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247021159] [2021-08-21 13:10:15,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:10:15,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:15,999 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) [2021-08-21 13:10:16,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:10:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:10:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:18,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:10:18,847 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 28 treesize of output 16 [2021-08-21 13:10:19,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:10:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247021159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:19,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:19,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:10:19,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337534764] [2021-08-21 13:10:19,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:10:19,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:10:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:10:19,159 INFO L87 Difference]: Start difference. First operand 37978 states and 157203 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:21,386 INFO L93 Difference]: Finished difference Result 80310 states and 326452 transitions. [2021-08-21 13:10:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:10:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:21,871 INFO L225 Difference]: With dead ends: 80310 [2021-08-21 13:10:21,871 INFO L226 Difference]: Without dead ends: 80118 [2021-08-21 13:10:21,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1269.4ms TimeCoverageRelationStatistics Valid=428, Invalid=2122, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:10:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80118 states. [2021-08-21 13:10:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80118 to 37636. [2021-08-21 13:10:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37636 states, 37635 states have (on average 4.143722598644878) internal successors, (155949), 37635 states have internal predecessors, (155949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37636 states to 37636 states and 155949 transitions. [2021-08-21 13:10:23,365 INFO L78 Accepts]: Start accepts. Automaton has 37636 states and 155949 transitions. Word has length 39 [2021-08-21 13:10:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:23,365 INFO L470 AbstractCegarLoop]: Abstraction has 37636 states and 155949 transitions. [2021-08-21 13:10:23,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 37636 states and 155949 transitions. [2021-08-21 13:10:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:23,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:23,461 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:23,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 13:10:23,683 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,SelfDestructingSolverStorable57 [2021-08-21 13:10:23,684 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1657545949, now seen corresponding path program 50 times [2021-08-21 13:10:23,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:23,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357824980] [2021-08-21 13:10:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:23,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:24,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:24,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357824980] [2021-08-21 13:10:24,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357824980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:24,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621202852] [2021-08-21 13:10:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:10:24,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:24,134 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) [2021-08-21 13:10:24,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:10:26,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:10:26,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:10:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:27,104 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:10:27,104 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 28 treesize of output 16 [2021-08-21 13:10:27,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 13:10:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621202852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:27,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:27,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:10:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877563234] [2021-08-21 13:10:27,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:10:27,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:10:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:10:27,360 INFO L87 Difference]: Start difference. First operand 37636 states and 155949 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:28,978 INFO L93 Difference]: Finished difference Result 84015 states and 343511 transitions. [2021-08-21 13:10:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:10:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:29,484 INFO L225 Difference]: With dead ends: 84015 [2021-08-21 13:10:29,485 INFO L226 Difference]: Without dead ends: 83960 [2021-08-21 13:10:29,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 932.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:10:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83960 states. [2021-08-21 13:10:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83960 to 37097. [2021-08-21 13:10:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37097 states, 37096 states have (on average 4.149234418805262) internal successors, (153920), 37096 states have internal predecessors, (153920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37097 states to 37097 states and 153920 transitions. [2021-08-21 13:10:31,002 INFO L78 Accepts]: Start accepts. Automaton has 37097 states and 153920 transitions. Word has length 39 [2021-08-21 13:10:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:31,002 INFO L470 AbstractCegarLoop]: Abstraction has 37097 states and 153920 transitions. [2021-08-21 13:10:31,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 37097 states and 153920 transitions. [2021-08-21 13:10:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:31,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:31,086 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:31,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 13:10:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 13:10:31,289 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1732244979, now seen corresponding path program 51 times [2021-08-21 13:10:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:31,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480870565] [2021-08-21 13:10:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:31,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:31,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:31,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480870565] [2021-08-21 13:10:31,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480870565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:31,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136851380] [2021-08-21 13:10:31,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:10:31,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:31,755 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) [2021-08-21 13:10:31,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:10:34,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:10:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:34,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:10:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:34,981 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 13:10:34,982 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 37 treesize of output 21 [2021-08-21 13:10:35,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:35,171 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 35 treesize of output 43 [2021-08-21 13:10:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136851380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:35,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:35,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 13:10:35,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486071120] [2021-08-21 13:10:35,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:10:35,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:10:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:10:35,373 INFO L87 Difference]: Start difference. First operand 37097 states and 153920 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:36,926 INFO L93 Difference]: Finished difference Result 65028 states and 265115 transitions. [2021-08-21 13:10:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:10:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:37,325 INFO L225 Difference]: With dead ends: 65028 [2021-08-21 13:10:37,325 INFO L226 Difference]: Without dead ends: 64938 [2021-08-21 13:10:37,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:10:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64938 states. [2021-08-21 13:10:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64938 to 37311. [2021-08-21 13:10:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37311 states, 37310 states have (on average 4.145590994371482) internal successors, (154672), 37310 states have internal predecessors, (154672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37311 states to 37311 states and 154672 transitions. [2021-08-21 13:10:38,665 INFO L78 Accepts]: Start accepts. Automaton has 37311 states and 154672 transitions. Word has length 39 [2021-08-21 13:10:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:38,665 INFO L470 AbstractCegarLoop]: Abstraction has 37311 states and 154672 transitions. [2021-08-21 13:10:38,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37311 states and 154672 transitions. [2021-08-21 13:10:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:38,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:38,758 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:38,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 13:10:38,958 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,SelfDestructingSolverStorable59 [2021-08-21 13:10:38,959 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 50408069, now seen corresponding path program 52 times [2021-08-21 13:10:38,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:38,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656629641] [2021-08-21 13:10:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:38,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:39,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:39,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656629641] [2021-08-21 13:10:39,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656629641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:39,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394262965] [2021-08-21 13:10:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:10:39,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:39,413 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) [2021-08-21 13:10:39,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:10:42,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:10:42,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 13:10:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:42,626 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:10:42,626 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 33 treesize of output 21 [2021-08-21 13:10:42,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 13:10:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394262965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:42,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:42,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 13:10:42,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140208142] [2021-08-21 13:10:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:10:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:10:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:10:42,829 INFO L87 Difference]: Start difference. First operand 37311 states and 154672 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:44,555 INFO L93 Difference]: Finished difference Result 78790 states and 320538 transitions. [2021-08-21 13:10:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:10:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:45,029 INFO L225 Difference]: With dead ends: 78790 [2021-08-21 13:10:45,029 INFO L226 Difference]: Without dead ends: 78606 [2021-08-21 13:10:45,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1113.1ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:10:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78606 states. [2021-08-21 13:10:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78606 to 37121. [2021-08-21 13:10:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37121 states, 37120 states have (on average 4.148814655172414) internal successors, (154004), 37120 states have internal predecessors, (154004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37121 states to 37121 states and 154004 transitions. [2021-08-21 13:10:46,484 INFO L78 Accepts]: Start accepts. Automaton has 37121 states and 154004 transitions. Word has length 39 [2021-08-21 13:10:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:46,484 INFO L470 AbstractCegarLoop]: Abstraction has 37121 states and 154004 transitions. [2021-08-21 13:10:46,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37121 states and 154004 transitions. [2021-08-21 13:10:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:46,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:46,564 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:46,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:10:46,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:46,765 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:10:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash -412940279, now seen corresponding path program 53 times [2021-08-21 13:10:46,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:46,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504602553] [2021-08-21 13:10:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:46,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:47,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504602553] [2021-08-21 13:10:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504602553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529498777] [2021-08-21 13:10:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:10:47,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:47,216 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) [2021-08-21 13:10:47,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:10:50,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:10:50,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 13:10:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:50,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:50,603 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 39 treesize of output 57 [2021-08-21 13:10:50,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-08-21 13:10:50,845 INFO L354 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2021-08-21 13:10:50,845 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 36 treesize of output 50 [2021-08-21 13:10:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:50,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529498777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:50,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:50,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 13:10:50,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448047079] [2021-08-21 13:10:50,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:10:50,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:10:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:10:50,963 INFO L87 Difference]: Start difference. First operand 37121 states and 154004 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:54,638 INFO L93 Difference]: Finished difference Result 70951 states and 290114 transitions. [2021-08-21 13:10:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:10:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:10:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:54,917 INFO L225 Difference]: With dead ends: 70951 [2021-08-21 13:10:54,917 INFO L226 Difference]: Without dead ends: 70610 [2021-08-21 13:10:54,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2621.3ms TimeCoverageRelationStatistics Valid=835, Invalid=4277, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 13:10:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70610 states. [2021-08-21 13:10:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70610 to 37547. [2021-08-21 13:10:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37547 states, 37546 states have (on average 4.143690406434773) internal successors, (155579), 37546 states have internal predecessors, (155579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37547 states to 37547 states and 155579 transitions. [2021-08-21 13:10:56,230 INFO L78 Accepts]: Start accepts. Automaton has 37547 states and 155579 transitions. Word has length 39 [2021-08-21 13:10:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:56,230 INFO L470 AbstractCegarLoop]: Abstraction has 37547 states and 155579 transitions. [2021-08-21 13:10:56,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37547 states and 155579 transitions. [2021-08-21 13:10:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:10:56,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:56,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]