/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:45:12,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:45:12,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:45:12,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:45:12,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:45:12,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:45:12,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:45:12,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:45:12,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:45:12,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:45:12,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:45:12,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:45:12,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:45:12,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:45:12,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:45:12,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:45:12,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:45:12,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:45:12,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:45:12,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:45:12,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:45:12,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:45:12,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:45:12,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:45:12,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:45:12,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:45:12,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:45:12,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:45:12,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 17:45:12,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:45:12,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:45:12,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:45:12,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:45:12,236 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:45:12,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:45:12,236 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:45:12,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:45:12,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:45:12,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:45:12,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:45:12,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:45:12,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:45:12,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:45:12,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:45:12,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:45:12,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:45:12,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:45:12,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:45:12,241 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:45:12,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:45:12,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:45:12,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:45:12,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:45:12,572 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:45:12,573 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:45:12,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl [2021-08-21 17:45:12,574 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl' [2021-08-21 17:45:12,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:45:12,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:45:12,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:45:12,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:45:12,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:45:12,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:45:12,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:45:12,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:45:12,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:45:12,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:45:12,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:45:12,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:45:12,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:45:12,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/1) ... [2021-08-21 17:45:12,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:45:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:12,682 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 17:45:12,703 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 17:45:12,720 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:45:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:45:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:45:12,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:45:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:45:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:45:12,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:45:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:45:12,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:45:12,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:45:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:45:12,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:45:12,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 17:45:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 17:45:12,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 17:45:12,723 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 17:45:12,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:45:12,958 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:45:12,960 INFO L202 PluginConnector]: Adding new model exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:45:12 BoogieIcfgContainer [2021-08-21 17:45:12,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:45:12,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:45:12,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:45:12,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:45:12,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:12" (1/2) ... [2021-08-21 17:45:12,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3513fb and model type exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:45:12, skipping insertion in model container [2021-08-21 17:45:12,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:45:12" (2/2) ... [2021-08-21 17:45:12,966 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x9.wvr.bpl [2021-08-21 17:45:12,970 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:45:12,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:45:12,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:45:12,971 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:45:13,017 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 17:45:13,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:45:13,083 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 17:45:13,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 17:45:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 12225 states, 10214 states have (on average 1.3176032896025063) internal successors, (13458), 12224 states have internal predecessors, (13458), 0 states have call successors, (0), 0 states 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 17:45:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:14,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:14,156 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 17:45:14,156 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 17:45:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash -357571630, now seen corresponding path program 1 times [2021-08-21 17:45:14,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:14,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123577342] [2021-08-21 17:45:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:14,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:14,327 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 17:45:14,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:14,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123577342] [2021-08-21 17:45:14,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123577342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:14,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:14,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:45:14,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525819603] [2021-08-21 17:45:14,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:45:14,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:45:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:45:14,401 INFO L87 Difference]: Start difference. First operand has 12225 states, 10214 states have (on average 1.3176032896025063) internal successors, (13458), 12224 states have internal predecessors, (13458), 0 states have call successors, (0), 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 17:45:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:14,605 INFO L93 Difference]: Finished difference Result 12650 states and 13994 transitions. [2021-08-21 17:45:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:45:14,607 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 17:45:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:14,655 INFO L225 Difference]: With dead ends: 12650 [2021-08-21 17:45:14,656 INFO L226 Difference]: Without dead ends: 5916 [2021-08-21 17:45:14,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:45:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2021-08-21 17:45:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 5868. [2021-08-21 17:45:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 1.1457303562297596) internal successors, (6722), 5867 states have internal predecessors, (6722), 0 states have call successors, (0), 0 states 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 17:45:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 6722 transitions. [2021-08-21 17:45:14,914 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 6722 transitions. Word has length 19 [2021-08-21 17:45:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:14,915 INFO L470 AbstractCegarLoop]: Abstraction has 5868 states and 6722 transitions. [2021-08-21 17:45:14,915 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 17:45:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 6722 transitions. [2021-08-21 17:45:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:14,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:14,933 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 17:45:14,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:45:14,933 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 17:45:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1657457193, now seen corresponding path program 1 times [2021-08-21 17:45:14,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:14,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602934406] [2021-08-21 17:45:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:14,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:14,994 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 17:45:14,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:14,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602934406] [2021-08-21 17:45:14,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602934406] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:14,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:14,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:14,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940837095] [2021-08-21 17:45:14,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:14,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:14,998 INFO L87 Difference]: Start difference. First operand 5868 states and 6722 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 17:45:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:15,253 INFO L93 Difference]: Finished difference Result 8328 states and 9536 transitions. [2021-08-21 17:45:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:15,253 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 17:45:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:15,282 INFO L225 Difference]: With dead ends: 8328 [2021-08-21 17:45:15,283 INFO L226 Difference]: Without dead ends: 8328 [2021-08-21 17:45:15,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2021-08-21 17:45:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 6524. [2021-08-21 17:45:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6524 states, 6523 states have (on average 1.1462517246665644) internal successors, (7477), 6523 states have internal predecessors, (7477), 0 states have call successors, (0), 0 states 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 17:45:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 7477 transitions. [2021-08-21 17:45:15,459 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 7477 transitions. Word has length 27 [2021-08-21 17:45:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:15,459 INFO L470 AbstractCegarLoop]: Abstraction has 6524 states and 7477 transitions. [2021-08-21 17:45:15,460 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 17:45:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 7477 transitions. [2021-08-21 17:45:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:15,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:15,478 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 17:45:15,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:45:15,480 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 17:45:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1200702697, now seen corresponding path program 1 times [2021-08-21 17:45:15,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:15,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278894350] [2021-08-21 17:45:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:15,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:15,534 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 17:45:15,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:15,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278894350] [2021-08-21 17:45:15,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278894350] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:15,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:15,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:15,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994711816] [2021-08-21 17:45:15,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:15,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:15,537 INFO L87 Difference]: Start difference. First operand 6524 states and 7477 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 17:45:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:15,731 INFO L93 Difference]: Finished difference Result 7796 states and 9312 transitions. [2021-08-21 17:45:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:15,732 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 17:45:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:15,780 INFO L225 Difference]: With dead ends: 7796 [2021-08-21 17:45:15,781 INFO L226 Difference]: Without dead ends: 7796 [2021-08-21 17:45:15,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-08-21 17:45:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 7414. [2021-08-21 17:45:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 1.1920949682989344) internal successors, (8837), 7413 states have internal predecessors, (8837), 0 states have call successors, (0), 0 states 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 17:45:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 8837 transitions. [2021-08-21 17:45:15,950 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 8837 transitions. Word has length 27 [2021-08-21 17:45:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 7414 states and 8837 transitions. [2021-08-21 17:45:15,950 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 17:45:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 8837 transitions. [2021-08-21 17:45:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:15,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:15,970 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 17:45:15,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:45:15,970 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 17:45:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -937915369, now seen corresponding path program 1 times [2021-08-21 17:45:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:15,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359059084] [2021-08-21 17:45:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:15,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:16,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:16,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359059084] [2021-08-21 17:45:16,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359059084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:16,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147855349] [2021-08-21 17:45:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:16,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:16,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:16,042 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 17:45:16,077 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 17:45:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:16,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:45:16,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:16,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147855349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:16,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:45:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981316330] [2021-08-21 17:45:16,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:16,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:16,260 INFO L87 Difference]: Start difference. First operand 7414 states and 8837 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 17:45:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:16,404 INFO L93 Difference]: Finished difference Result 8932 states and 10683 transitions. [2021-08-21 17:45:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:16,404 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 17:45:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:16,474 INFO L225 Difference]: With dead ends: 8932 [2021-08-21 17:45:16,474 INFO L226 Difference]: Without dead ends: 8932 [2021-08-21 17:45:16,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2021-08-21 17:45:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8224. [2021-08-21 17:45:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 1.1978596619238722) internal successors, (9850), 8223 states have internal predecessors, (9850), 0 states have call successors, (0), 0 states 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 17:45:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 9850 transitions. [2021-08-21 17:45:16,672 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 9850 transitions. Word has length 27 [2021-08-21 17:45:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:16,673 INFO L470 AbstractCegarLoop]: Abstraction has 8224 states and 9850 transitions. [2021-08-21 17:45:16,673 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 17:45:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 9850 transitions. [2021-08-21 17:45:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:16,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:16,692 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 17:45:16,717 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 17:45:16,904 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 17:45:16,905 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 17:45:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -486830867, now seen corresponding path program 2 times [2021-08-21 17:45:16,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:16,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508768979] [2021-08-21 17:45:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:16,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:16,944 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 17:45:16,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:16,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508768979] [2021-08-21 17:45:16,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508768979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:16,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:16,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:16,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585337338] [2021-08-21 17:45:16,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:16,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:16,948 INFO L87 Difference]: Start difference. First operand 8224 states and 9850 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 17:45:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:17,049 INFO L93 Difference]: Finished difference Result 8786 states and 10505 transitions. [2021-08-21 17:45:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:17,049 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 17:45:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:17,069 INFO L225 Difference]: With dead ends: 8786 [2021-08-21 17:45:17,069 INFO L226 Difference]: Without dead ends: 8786 [2021-08-21 17:45:17,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2021-08-21 17:45:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 8368. [2021-08-21 17:45:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8368 states, 8367 states have (on average 1.1968447472212262) internal successors, (10014), 8367 states have internal predecessors, (10014), 0 states have call successors, (0), 0 states 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 17:45:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8368 states to 8368 states and 10014 transitions. [2021-08-21 17:45:17,240 INFO L78 Accepts]: Start accepts. Automaton has 8368 states and 10014 transitions. Word has length 27 [2021-08-21 17:45:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:17,240 INFO L470 AbstractCegarLoop]: Abstraction has 8368 states and 10014 transitions. [2021-08-21 17:45:17,240 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 17:45:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 8368 states and 10014 transitions. [2021-08-21 17:45:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:17,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:17,263 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 17:45:17,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:45:17,267 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 17:45:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:17,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1966965609, now seen corresponding path program 1 times [2021-08-21 17:45:17,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:17,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150054706] [2021-08-21 17:45:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:17,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:17,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150054706] [2021-08-21 17:45:17,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150054706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170815983] [2021-08-21 17:45:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:17,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:17,317 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 17:45:17,318 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 17:45:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:45:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170815983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:17,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:17,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:45:17,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974890336] [2021-08-21 17:45:17,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:17,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:17,491 INFO L87 Difference]: Start difference. First operand 8368 states and 10014 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 17:45:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:17,580 INFO L93 Difference]: Finished difference Result 9596 states and 12298 transitions. [2021-08-21 17:45:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:17,581 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 17:45:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:17,599 INFO L225 Difference]: With dead ends: 9596 [2021-08-21 17:45:17,600 INFO L226 Difference]: Without dead ends: 9596 [2021-08-21 17:45:17,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9596 states. [2021-08-21 17:45:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9596 to 9192. [2021-08-21 17:45:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 9191 states have (on average 1.2826678272222827) internal successors, (11789), 9191 states have internal predecessors, (11789), 0 states have call successors, (0), 0 states 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 17:45:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 11789 transitions. [2021-08-21 17:45:17,788 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 11789 transitions. Word has length 27 [2021-08-21 17:45:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:17,789 INFO L470 AbstractCegarLoop]: Abstraction has 9192 states and 11789 transitions. [2021-08-21 17:45:17,789 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 17:45:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 11789 transitions. [2021-08-21 17:45:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:45:17,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:17,807 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 17:45:17,830 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 17:45:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 17:45:18,021 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 17:45:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 197351533, now seen corresponding path program 2 times [2021-08-21 17:45:18,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:18,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967201707] [2021-08-21 17:45:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:18,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:18,055 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 17:45:18,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:18,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967201707] [2021-08-21 17:45:18,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967201707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:18,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:18,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:45:18,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183851167] [2021-08-21 17:45:18,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:18,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:18,057 INFO L87 Difference]: Start difference. First operand 9192 states and 11789 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 17:45:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:18,134 INFO L93 Difference]: Finished difference Result 9594 states and 12292 transitions. [2021-08-21 17:45:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:18,134 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 17:45:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:18,156 INFO L225 Difference]: With dead ends: 9594 [2021-08-21 17:45:18,156 INFO L226 Difference]: Without dead ends: 9592 [2021-08-21 17:45:18,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2021-08-21 17:45:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 9194. [2021-08-21 17:45:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 1.2824975524855868) internal successors, (11790), 9193 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states 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 17:45:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 11790 transitions. [2021-08-21 17:45:18,338 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 11790 transitions. Word has length 27 [2021-08-21 17:45:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:18,338 INFO L470 AbstractCegarLoop]: Abstraction has 9194 states and 11790 transitions. [2021-08-21 17:45:18,338 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 17:45:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 11790 transitions. [2021-08-21 17:45:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:45:18,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:18,355 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, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:18,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 17:45:18,356 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 17:45:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash -159250148, now seen corresponding path program 1 times [2021-08-21 17:45:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:18,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953576098] [2021-08-21 17:45:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:18,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:18,708 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 17:45:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:18,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953576098] [2021-08-21 17:45:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953576098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:18,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795809047] [2021-08-21 17:45:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:18,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:18,713 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 17:45:18,745 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 17:45:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:45:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:20,531 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-21 17:45:20,557 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 17:45:20,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:20,746 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_135 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:588) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:576) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:489) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:215) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:588) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:576) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:489) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:412) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:202) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:186) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:131) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-21 17:45:20,750 INFO L168 Benchmark]: Toolchain (without parser) took 8153.94 ms. Allocated memory was 188.7 MB in the beginning and 1.1 GB in the end (delta: 885.0 MB). Free memory was 169.7 MB in the beginning and 796.4 MB in the end (delta: -626.8 MB). Peak memory consumption was 259.2 MB. Max. memory is 8.0 GB. [2021-08-21 17:45:20,751 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 188.7 MB. Free memory is still 170.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:45:20,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.80 ms. Allocated memory is still 188.7 MB. Free memory was 169.7 MB in the beginning and 168.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:45:20,751 INFO L168 Benchmark]: Boogie Preprocessor took 30.40 ms. Allocated memory is still 188.7 MB. Free memory was 168.1 MB in the beginning and 167.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:45:20,752 INFO L168 Benchmark]: RCFGBuilder took 306.30 ms. Allocated memory is still 188.7 MB. Free memory was 167.0 MB in the beginning and 152.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 17:45:20,752 INFO L168 Benchmark]: TraceAbstraction took 7787.37 ms. Allocated memory was 188.7 MB in the beginning and 1.1 GB in the end (delta: 885.0 MB). Free memory was 152.2 MB in the beginning and 796.4 MB in the end (delta: -644.3 MB). Peak memory consumption was 241.3 MB. Max. memory is 8.0 GB. [2021-08-21 17:45:20,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 188.7 MB. Free memory is still 170.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.80 ms. Allocated memory is still 188.7 MB. Free memory was 169.7 MB in the beginning and 168.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.40 ms. Allocated memory is still 188.7 MB. Free memory was 168.1 MB in the beginning and 167.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 306.30 ms. Allocated memory is still 188.7 MB. Free memory was 167.0 MB in the beginning and 152.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7787.37 ms. Allocated memory was 188.7 MB in the beginning and 1.1 GB in the end (delta: 885.0 MB). Free memory was 152.2 MB in the beginning and 796.4 MB in the end (delta: -644.3 MB). Peak memory consumption was 241.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 39974, positive: 38740, positive conditional: 38740, positive unconditional: 0, negative: 1234, negative conditional: 1234, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 38740, positive: 38740, positive conditional: 0, positive unconditional: 38740, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 720, positive: 720, positive conditional: 0, positive unconditional: 720, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 720, positive: 720, positive conditional: 0, positive unconditional: 720, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 38740, positive: 38020, positive conditional: 0, positive unconditional: 38020, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 720, unknown conditional: 0, unknown unconditional: 720] , Statistics on independence cache: Total cache size (in pairs): 720, Positive cache size: 720, Positive conditional cache size: 0, Positive unconditional cache size: 720, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 1234 - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_135 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_135 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-21 17:45:20,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...